> ## Documentation Index > Fetch the complete documentation index at: https://docs.lightspark.com/llms.txt > Use this file to discover all available pages before exploring further. # Add an administrator credential > Add a credential for an additional administrator of a `BUSINESS` customer's Embedded Wallet. The new administrator gets their own `EMAIL_OTP` or `PASSKEY` credential, tagged with `adminReference`, and signs for the wallet with it as the owner does. The wallet stays non-custodial: Grid never adds an administrator on its own, and every step is authorised by a signature from an existing verified credential on the account (the owner's, or another administrator's). This is the only way an administrator adds a credential. An administrator's session cannot sign `POST /auth/credentials`, which Grid refuses with `403 FORBIDDEN`, so every credential belonging to an administrator carries their `adminReference` and removing them revokes it. An administrator added with another administrator's signature has their own `adminReference` and is removed separately. It takes two signed steps. The first call returns `202` with a `payloadToSign` that creates the administrator's wallet user; the signed retry returns another `202` whose payload grants that user the authority to sign for the wallet; the second signed retry returns `201` with the new `AuthMethod`. The administrator then signs in with `POST /auth/credentials/{id}/challenge` and `POST /auth/credentials/{id}/verify`. ## OpenAPI ````yaml /openapi.yaml post /auth/admin-credentials openapi: 3.1.0 info: title: Grid API description: > API for managing global payments on the open Money Grid. Built by Lightspark. See the full documentation at https://docs.lightspark.com/. version: '2025-10-13' contact: name: Lightspark Support email: support@lightspark.com license: name: Proprietary url: https://lightspark.com/terms servers: - url: https://api.lightspark.com/grid/2025-10-13 description: Production server security: - BasicAuth: [] - AgentAuth: [] tags: - name: Platform Configuration description: >- Platform configuration endpoints for managing global settings. You can also configure these settings in the Grid dashboard. - name: Customers description: >- Customer management endpoints for creating and updating customer information - name: Contact Verification description: >- Endpoints for verifying a customer's email and phone via one-time codes. Required only for customers whose payment provider mandates contact verification (e.g. EU customers); other providers return 409. - name: Strong Customer Authentication description: >- Endpoints for authorizing money-movement operations that require Strong Customer Authentication. Relevant only for customers in a region where SCA is required (e.g. EU); customers outside SCA-regulated regions never see an SCA challenge and these endpoints return 409. - name: KYC/KYB Verifications description: >- Endpoints for Know Your Customer (KYC) and Know Your Business (KYB) verification, including managing beneficial owners and triggering verification for customers. - name: Documents description: >- Endpoints for uploading and managing verification documents for customers and beneficial owners. Supports KYC and KYB document requirements. - name: Internal Accounts description: >- Internal account management endpoints for creating and managing internal accounts - name: Periodic Statements description: > Build, deliver, and evidence a Regulation E periodic statement for a customer's internal account. A statement period is a calendar month in US Central time (`America/Chicago`). A statement is issued for each customer's own USD internal account and covers their whole balance. Money received through a rule-based account appears on its owner's statement; rule-based, bulk settlement and platform-owned accounts have no statement of their own. **1. The statement — `GET /internal-accounts/{id}/balance-changes?startDate=&endDate=`** One row per change to the balance, in the order the money moved, with the opening and closing balances for the window in the same response. Page until `hasMore` is false, then assert this identity across every page before you render anything: ``` openingBalance + Σ(data[].amount) == closingBalance ``` If it does not hold, do not send the statement; contact support instead. `startDate` and `endDate` bound a half-open window `[startDate, endDate)`: for a monthly statement, pass the first instant of the month and the first instant of the following month, both in US Central time (for August 2026, `2026-08-01T00:00:00-05:00` and `2026-09-01T00:00:00-05:00`). Grid records a statement as fetched only for a window that is exactly one such month. **2. The receipt — `POST /internal-accounts/{id}/confirm-statement`** Once a month, after you have pulled and issued a period's statement, send a receipt with the `statementMonth` it covers. Grid stores it as the delivery record for that account and period. Sending it again is harmless: the first receipt's time is kept. **Timing** A window whose card settlement has not closed is refused with `409 NOT_YET_AVAILABLE` rather than answered with figures that could still change; retry once it has settled. - name: External Accounts description: >- External account management endpoints for creating and managing external bank accounts - name: Same-Currency Transfers description: >- Deprecated endpoints for transferring funds between internal and external accounts with the same currency. Use the quote endpoints under Cross-Currency Transfers instead, which now serve same-currency transfers as well. - name: Cross-Currency Transfers description: >- Endpoints for creating and confirming quotes for transfers, both same-currency and cross-currency - name: Transactions description: Endpoints for retrieving transaction information - name: Webhooks description: Webhook endpoints and configuration for receiving notifications - name: Invitations description: Endpoints for creating, claiming and managing UMA invitations - name: Sandbox description: Endpoints to trigger test cases in sandbox - name: API Tokens description: Endpoints to programmatically manage API tokens - name: Exchange Rates description: >- Endpoints for retrieving cached foreign exchange rates. Rates are cached for approximately 5 minutes and include platform-specific fees. - name: Discoveries description: >- Endpoints for discovering available payment rails, banks, and providers for a given country and currency corridor. - name: Embedded Wallet Auth description: >- Endpoints for registering and verifying end-user authentication credentials (email OTP, OAuth, passkey) used to sign Embedded Wallet actions. - name: Agent Management description: >- Endpoints for creating and managing agents (experimental), called by the partner's backend using platform credentials. Covers the full agent lifecycle: creation, policy configuration, pausing, deletion, the device code installation flow, and approving or rejecting transactions initiated by agents. - name: Agent Operations description: >- Experimental endpoints called by the agent itself using its own credentials (obtained via device code redemption). Scoped to the agent's associated customer — all requests automatically operate on behalf of that customer and are subject to the agent's policy. When an action requires approval, the resulting transaction enters a pending state and must be approved by the platform via `POST /transactions/{transactionId}/approve`. - name: Claimable Payouts description: >- Endpoints the platform's claim page calls for a claimable payout an agent sent to a person by phone number or email: issue the claim token for the recipient's link, look the payout up by it, list how Grid can pay her, lock a quote to her account and confirm it. - name: Cards description: >- Card management endpoints. Issue debit cards against an internal account, freeze / unfreeze, close, manage a card's funding source, and list card transactions. - name: Stablecoins description: >- Stablecoin issuance endpoints. Link provider accounts, register provider-created stablecoins, create direct mint/burn issuer operations, and track operation status. - name: Embedded Care description: | A support chat between the cardholder and Lightspark's care agent, driven from the partner's own app. The platform calls with its ordinary Grid credential, but the person typing is the cardholder rather than the caller, so reaching that cardholder's account takes a second proof: an SMS code they send into the chat, after which the partner carries a session token in the `X-Ls-Care-Session` header. **The surface is two routes, and verification happens inside the conversation.** 1. **Open the chat.** `POST /care/chats/{chatId}/messages` with an empty `message`, addressed to the cardholder as `Customer:`. Returns the chat's id and the agent's opening line in `reply`, which is what a chat window renders before anybody has typed. Sends no SMS, needs no `Idempotency-Key` and consumes none, and is safe to call again: a widget that reloaded gets the same chat back, this time without a `reply`. 2. **Send the cardholder's first message.** The same route with their text and an `Idempotency-Key` header. One turn runs synchronously and the agent's answer comes back in `reply`. On a chat that cannot yet reach the account this call also texts the cardholder a code, and the agent's `reply` asks for it. 3. **The cardholder sends the code as an ordinary message.** When it is correct, the response to that turn carries `sessionToken` and `expiresAt`. Send that token as the `X-Ls-Care-Session` header on every message from then on. A code that does not match is answered in `reply`, and the cardholder can simply send it again. 4. **Close the chat** with `DELETE /care/chats/{chatId}` when the cardholder is done. Every response also carries `chatEnded`, and the agent can end the chat itself: when `chatEnded` is true, the closing line is in `reply` and the chat takes no further messages, so stop sending to it. An opening addressed to that `CareChat:` answers `409 CARE_CHAT_ENDED`; address the cardholder as `Customer:` to open a new chat. **Render `redactedCustomerMessage` if present, then `reply` if present.** That one rule covers an opening, a resume and a turn. **A cardholder whose code never arrived asks the agent for another one.** The agent sends a new code to the number on file and says so in its `reply`. There is no separate route for it. **The verification fields are optional hints.** `verificationRequired` and `codeLength` let an app show a dedicated one-time-code input of the right length, marked as a one-time code so iOS and Android offer to fill it from the SMS. A partner can ignore them, since the agent asks for the code in its reply and says where it went, and the app still sends the code as an ordinary message. Step 1 is optional. A message addressed to a `Customer:` id opens that cardholder's chat if they have none, so a partner whose cardholder has just typed something spends one call rather than two. A cardholder who has not verified yet is never a `401`, because the first message from every new cardholder is unverified and a `401` there would be indistinguishable from a bad credential. On these endpoints a `401` means the platform's Grid credential is wrong, the session token presented is malformed, or a replay lacks the session token its original request required. **Verification expires, and a lost session is recoverable in the chat.** A chat reaches the cardholder's account only while its verification is newer than the session lifetime, fifteen minutes in the default deployment, which is also how long a session token lives. Past that window a message gets a fresh code, and the agent asks the cardholder to send it back inside the conversation, which hands the partner the next session token. A new message sent with no `X-Ls-Care-Session` header, or with a token past its expiry, on a chat whose verification is still current is treated the same way: the verification is cancelled before the turn runs, a new code is sent, and the agent asks for it. So a client that lost its token, or held one too long, simply keeps sending messages. Only a token that is malformed, or that was minted for another platform, chat or cardholder, is refused. Two things an integration has to get right: - **Render `redactedCustomerMessage`, never your own copy of what was typed.** Grid masks card numbers and other sensitive digit strings in it. A UI that renders its own copy of the input instead puts a card number the cardholder pasted back on their screen unmasked, and into your logs. - **The session token is returned once and is never re-readable.** No endpoint hands it back, it cannot be revoked, and it is short-lived by design. Hold it for the life of the cardholder's session. It arrives on the message response to the turn in which the cardholder sent their code, and on no other. Losing it costs the cardholder a new code, never access to the chat. Some things are absent by construction, so no integration can come to depend on them: nothing returns a transcript or an earlier turn's reply (retrying under the original `Idempotency-Key` is how an answer that was produced but not delivered is recovered; a replay requires the same session token its original request required and never carries a `sessionToken`, so a lost token is recovered by sending the cardholder's next message as a new message, which verifies them again), nothing sets a verification state, and nothing changes the number a code is sent to. Errors from these endpoints carry `code` and `reason` only (see the `CareError` schema), unlike the `Error4xx` schemas used elsewhere in this specification. paths: /auth/admin-credentials: post: tags: - Embedded Wallet Auth summary: Add an administrator credential description: > Add a credential for an additional administrator of a `BUSINESS` customer's Embedded Wallet. The new administrator gets their own `EMAIL_OTP` or `PASSKEY` credential, tagged with `adminReference`, and signs for the wallet with it as the owner does. The wallet stays non-custodial: Grid never adds an administrator on its own, and every step is authorised by a signature from an existing verified credential on the account (the owner's, or another administrator's). This is the only way an administrator adds a credential. An administrator's session cannot sign `POST /auth/credentials`, which Grid refuses with `403 FORBIDDEN`, so every credential belonging to an administrator carries their `adminReference` and removing them revokes it. An administrator added with another administrator's signature has their own `adminReference` and is removed separately. It takes two signed steps. The first call returns `202` with a `payloadToSign` that creates the administrator's wallet user; the signed retry returns another `202` whose payload grants that user the authority to sign for the wallet; the second signed retry returns `201` with the new `AuthMethod`. The administrator then signs in with `POST /auth/credentials/{id}/challenge` and `POST /auth/credentials/{id}/verify`. operationId: createAdminCredential parameters: - name: Grid-Wallet-Signature in: header required: false description: >- Full API-key stamp built over the prior `payloadToSign` with the session API keypair of an existing verified credential on the same internal account. Required on each signed retry. schema: type: string example: >- eyJwdWJsaWNLZXkiOiIwMmExYjIuLi4iLCJzY2hlbWUiOiJTSUdOQVRVUkVfU0NIRU1FX1RLX0FQSV9QMjU2Iiwic2lnbmF0dXJlIjoiMzA0NTAyMjEwMC4uLiJ9 - name: Request-Id in: header required: false description: >- The `requestId` of the `202` being answered, echoed back exactly on the signed retry. Must be paired with `Grid-Wallet-Signature`. schema: type: string example: Request:7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AdminCredentialCreateRequestOneOf' responses: '201': description: The administrator's credential was added. content: application/json: schema: $ref: '#/components/schemas/AuthMethodResponse' '202': description: >- A signature is needed: stamp `payloadToSign` with the session key of an existing verified credential on the account and retry with `Grid-Wallet-Signature` and `Request-Id`. content: application/json: schema: $ref: '#/components/schemas/AuthSignedRequestChallenge' '400': description: >- Bad request, including a customer that is not a business or an email already on the account content: application/json: schema: $ref: '#/components/schemas/Error400' '401': description: Unauthorized, including a signature that does not verify content: application/json: schema: $ref: '#/components/schemas/Error401' '404': description: Internal account not found content: application/json: schema: $ref: '#/components/schemas/Error404' '500': description: Internal service error content: application/json: schema: $ref: '#/components/schemas/Error500' security: - BasicAuth: [] components: schemas: AdminCredentialCreateRequestOneOf: oneOf: - $ref: '#/components/schemas/EmailOtpAdminCredentialCreateRequest' - $ref: '#/components/schemas/PasskeyAdminCredentialCreateRequest' discriminator: propertyName: type mapping: EMAIL_OTP: '#/components/schemas/EmailOtpAdminCredentialCreateRequest' PASSKEY: '#/components/schemas/PasskeyAdminCredentialCreateRequest' AuthMethodResponse: title: Auth Method Response description: >- Strict wrapper around `AuthMethod`. Used directly as the registration response on `POST /auth/credentials` and inside `AuthCredentialResponseOneOf` for the `EMAIL_OTP` / `SMS_OTP` branches of `POST /auth/credentials/{id}/challenge`. The only difference from `AuthMethod` is `unevaluatedProperties: false`, which disambiguates the oneOf against `PasskeyAuthChallenge` — without the strictness, an `AuthMethod` with extra fields would ambiguously match both branches. For `EMAIL_OTP` and `SMS_OTP` credentials, responses that initiate or reissue an OTP challenge carry `otpEncryptionTargetBundle` so the client can HPKE-encrypt the OTP code in the subsequent `POST /auth/credentials/{id}/verify` call without the plaintext code ever transiting the server. First-time EMAIL_OTP wallet bootstrap registration can omit it; call `POST /auth/credentials/{id}/challenge` if it is absent. allOf: - $ref: '#/components/schemas/AuthMethod' - type: object properties: otpEncryptionTargetBundle: type: string description: >- HPKE encryption target bundle for a freshly initiated OTP challenge. Returned only on `EMAIL_OTP` and `SMS_OTP` responses that initiate or reissue an OTP challenge, such as `POST /auth/credentials/{id}/challenge` and signed-retry add responses. It is omitted from first-time EMAIL_OTP wallet bootstrap registration; call `POST /auth/credentials/{id}/challenge` for the new credential if it is absent. The client generates an ephemeral P-256 keypair (the Target Encryption Key, or TEK) and uses this bundle as the recipient when HPKE-encrypting `{otp_code, public_key}`, where `public_key` is the compressed TEK public key; the encrypted payload is submitted as `encryptedOtpBundle` on `POST /auth/credentials/{id}/verify`. The bundle is one-time-use per OTP issuance — re-issue via `POST /auth/credentials/{id}/challenge` to obtain a fresh bundle. The matching TEK private key must remain on the client and is used to stamp the exact UTF-8 bytes of the `payloadToSign` string returned by the first verify call. Preserve that string unchanged on the signed retry. Treat the bundle as opaque and pass it to your HPKE library; the Global Accounts client-keys guide shows how. example: >- {"version":"v1.0.0","data":"7b227461726765745075626c6963...","dataSignature":"30450221...","enclaveQuorumPublic":"04a1b2c3..."} unevaluatedProperties: false AuthSignedRequestChallenge: title: Authentication Signed Request Challenge description: >- 202 response returned from Embedded Wallet Auth endpoints that require a signed retry — `POST /auth/credentials` (adding an additional credential), `DELETE /auth/credentials/{id}` (revoking a credential), `DELETE /auth/sessions/{id}` (revoking a session), and the `EMAIL_OTP` / `SMS_OTP` branch of `POST /auth/credentials/{id}/verify` (the secure OTP login flow, where the client submits an `encryptedOtpBundle` and receives a login signing message as `payloadToSign` to stamp for session issuance). Carries the signing fields from `SignedRequestChallenge` plus the `type` of the authentication credential involved (being added, revoked, that issued the session being revoked, or being authenticated). The client already knows the target resource id from the request path / body it just sent, so nothing beyond `type` is echoed in the response. The keypair used to compute the stamp depends on the operation. For credential / session management retries, sign with the session API keypair of an existing verified credential on the same internal account. For OTP verify retries, sign with the ephemeral Target Encryption Key (TEK) the client generated for this login — its public key is the one carried inside the `encryptedOtpBundle` and bound into the `verificationToken`, and it becomes the client's session API key on successful completion. allOf: - $ref: '#/components/schemas/SignedRequestChallenge' - type: object required: - type properties: type: $ref: '#/components/schemas/AuthMethodType' description: >- Credential type relevant to this challenge: the credential type being added (`POST /auth/credentials`), revoked (`DELETE /auth/credentials/{id}`), or authenticated (`EMAIL_OTP` / `SMS_OTP` branch of `POST /auth/credentials/{id}/verify`). For session revocation, this is the type of credential that issued the session (`DELETE /auth/sessions/{id}`). Error400: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | INVALID_INPUT | Invalid input provided. When Grid knows the cause, `details.refusalReason` names it. When a card cannot be issued because the customer record lacks fields, it is `CARDHOLDER_INFO_MISSING` and `details.missingFields` lists them | | END_USER_TERMS_VERSION_NOT_FOUND | The submitted version is not supported for the agreement it was sent for | | MISSING_MANDATORY_USER_INFO | Required customer information is missing | | INVITATION_ALREADY_CLAIMED | Invitation has already been claimed | | INVITATIONS_NOT_CONFIGURED | Invitations are not configured | | INVALID_UMA_ADDRESS | UMA address format is invalid | | INVITATION_CANCELLED | Invitation has been cancelled | | INVALID_RECEIVER | Receiver is invalid | | PARSE_PAYREQ_RESPONSE_ERROR | Error parsing receiver PayReq response | | CERT_CHAIN_INVALID | Counterparty certificate chain is invalid | | CERT_CHAIN_EXPIRED | Counterparty certificate chain has expired | | INVALID_PUBKEY_FORMAT | Counterparty Public key format is invalid | | MISSING_REQUIRED_UMA_PARAMETERS | Counterparty required UMA parameters are missing | | SENDER_NOT_ACCEPTED | The receiving institution declined this sender. Final; a retry returns the same answer | | AMOUNT_OUT_OF_RANGE | Amount is out of range | | INVALID_CURRENCY | Currency is invalid | | INVALID_TIMESTAMP | Timestamp is invalid | | INVALID_NONCE | Nonce is invalid | | INVALID_REQUEST_FORMAT | Request format is invalid | | INVALID_BANK_ACCOUNT | Bank account is invalid | | SELF_PAYMENT | Self payment not allowed | | PARSE_LNURLP_RESPONSE_ERROR | Error parsing LNURLP response | | INVALID_AMOUNT | Amount is invalid | | WEBHOOK_ENDPOINT_NOT_SET | Webhook endpoint is not set | | WEBHOOK_DELIVERY_ERROR | Webhook delivery error | | LOW_QUALITY | Document quality too low to process | | DATA_MISMATCH | Document details don't match provided information | | EXPIRED | Document has expired | | SUSPECTED_FRAUD | Document suspected of being forged or edited | | UNSUITABLE_DOCUMENT | Document type is not accepted or not supported | | INCOMPLETE | Document is missing pages or sides | | EMAIL_OTP_CREDENTIAL_ALREADY_EXISTS | The account holder already has an EMAIL_OTP credential on the target internal account; the holder may have one. Administrators' credentials, added with `POST /auth/admin-credentials`, are not counted | | SMS_OTP_CREDENTIAL_ALREADY_EXISTS | An SMS_OTP credential is already registered on the target internal account; only one SMS OTP credential is supported per internal account at this time | | PASSKEY_CREDENTIAL_ALREADY_EXISTS | A PASSKEY credential with the same WebAuthn credentialId is already registered on the target internal account | | AUTH_CREDENTIAL_VERIFICATION_REQUIRED | The new email or phone number has no verified replacement credential | | AUTH_CREDENTIAL_VERIFICATION_EXPIRED | The replacement credential's verification has expired | | STABLECOIN_PROVIDER_ACCOUNT_INVALID | The stablecoin provider account link is not usable | | STABLECOIN_PROVIDER_ACCOUNT_REVOKED | The stablecoin provider account link has been revoked | | STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED | Multiple active provider account links exist; pass `stablecoinProviderAccountId` to select one | | CARDHOLDER_KYC_NOT_APPROVED | The cardholder's KYC status is not `APPROVED`, so a card cannot be issued | | ACCOUNTHOLDER_AGREEMENT_NOT_ACCEPTED | The customer create request omits an accountholder agreement its accounts require | | CARDHOLDER_AGREEMENT_NOT_ACCEPTED | The customer has not accepted the cardholder agreement the platform requires before a card is issued | | TRANSACTION_SIZE_LIMIT_EXCEEDED | The requested amount exceeds the configured maximum single-transaction amount for this trade corridor or withdrawal currency | | EXTERNAL_ACCOUNT_VERIFICATION_REQUIRED | The destination account's ownership must be verified before this transfer can proceed | | INSUFFICIENT_FUNDS | Insufficient funds for this operation | | QUOTE_EXPIRED | The quote has expired; request a new quote | | QUOTE_RATE_UNAVAILABLE | No exchange rate is available for this corridor right now | | STABLECOIN_AMOUNT_NOT_REPRESENTABLE | The amount cannot be represented at the token's precision | | STABLECOIN_BURN_SOURCE_NOT_SUPPORTED | The burn source account cannot be used for this operation | | STABLECOIN_EXTERNAL_ACCOUNT_LINK_FAILED | Linking the external account for stablecoin operations failed | | STABLECOIN_EXTERNAL_ACCOUNT_LINK_METHOD_REQUIRED | The external account needs a link method before it can be used | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_LINKED | The external account is not linked for stablecoin operations | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_SUPPORTED | This external account type is not supported for stablecoin operations | | STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_FAILED | The provider could not link the external account | | STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_REQUIRED | The external account must be linked with the provider first | | STABLECOIN_GRID_OPERATIONS_NOT_ENABLED | The stablecoin is not enabled for Grid operations | | STABLECOIN_NOT_PROVISIONED | The stablecoin is not provisioned for issuer operations | | STABLECOIN_OPERATION_NOT_SUPPORTED | The stablecoin does not support this operation | | STABLECOIN_PROVIDER_ERROR | The stablecoin provider rejected the operation | | STABLECOIN_PROVIDER_SOURCE_NOT_LINKED | The provider source account is not linked | | STABLECOIN_VERIFICATION_FAILED | The stablecoin could not be verified with the provider | | DOCUMENTS_REQUIRED | The destination requires supporting documents for the quote's `purposeOfPayment` that the request did not supply. `details.missingRequirements` lists the requirement ID of each one | | EXACT_AMOUNT_UNAVAILABLE | The quote cannot deliver exactly the requested receiving amount at the current rate; quote again shortly or lock the sending amount | enum: - INVALID_INPUT - END_USER_TERMS_VERSION_NOT_FOUND - MISSING_MANDATORY_USER_INFO - INVITATION_ALREADY_CLAIMED - INVITATIONS_NOT_CONFIGURED - INVALID_UMA_ADDRESS - INVITATION_CANCELLED - INVALID_RECEIVER - PARSE_PAYREQ_RESPONSE_ERROR - CERT_CHAIN_INVALID - CERT_CHAIN_EXPIRED - INVALID_PUBKEY_FORMAT - MISSING_REQUIRED_UMA_PARAMETERS - SENDER_NOT_ACCEPTED - AMOUNT_OUT_OF_RANGE - INVALID_CURRENCY - INVALID_TIMESTAMP - INVALID_NONCE - INVALID_REQUEST_FORMAT - INVALID_BANK_ACCOUNT - SELF_PAYMENT - PARSE_LNURLP_RESPONSE_ERROR - INVALID_AMOUNT - WEBHOOK_ENDPOINT_NOT_SET - WEBHOOK_DELIVERY_ERROR - LOW_QUALITY - DATA_MISMATCH - EXPIRED - SUSPECTED_FRAUD - UNSUITABLE_DOCUMENT - INCOMPLETE - EMAIL_OTP_CREDENTIAL_ALREADY_EXISTS - SMS_OTP_CREDENTIAL_ALREADY_EXISTS - PASSKEY_CREDENTIAL_ALREADY_EXISTS - AUTH_CREDENTIAL_VERIFICATION_REQUIRED - AUTH_CREDENTIAL_VERIFICATION_EXPIRED - STABLECOIN_PROVIDER_ACCOUNT_INVALID - STABLECOIN_PROVIDER_ACCOUNT_REVOKED - STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED - CARDHOLDER_KYC_NOT_APPROVED - ACCOUNTHOLDER_AGREEMENT_NOT_ACCEPTED - CARDHOLDER_AGREEMENT_NOT_ACCEPTED - TRANSACTION_SIZE_LIMIT_EXCEEDED - EXTERNAL_ACCOUNT_VERIFICATION_REQUIRED - INSUFFICIENT_FUNDS - QUOTE_EXPIRED - QUOTE_RATE_UNAVAILABLE - STABLECOIN_AMOUNT_NOT_REPRESENTABLE - STABLECOIN_BURN_SOURCE_NOT_SUPPORTED - STABLECOIN_EXTERNAL_ACCOUNT_LINK_FAILED - STABLECOIN_EXTERNAL_ACCOUNT_LINK_METHOD_REQUIRED - STABLECOIN_EXTERNAL_ACCOUNT_NOT_LINKED - STABLECOIN_EXTERNAL_ACCOUNT_NOT_SUPPORTED - STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_FAILED - STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_REQUIRED - STABLECOIN_GRID_OPERATIONS_NOT_ENABLED - STABLECOIN_NOT_PROVISIONED - STABLECOIN_OPERATION_NOT_SUPPORTED - STABLECOIN_PROVIDER_ERROR - STABLECOIN_PROVIDER_SOURCE_NOT_LINKED - STABLECOIN_VERIFICATION_FAILED - DOCUMENTS_REQUIRED - EXACT_AMOUNT_UNAVAILABLE reason: type: string description: Error message details: type: object description: >- Additional error details. Shape varies by `code`. For field-validation errors on submit endpoints (e.g. `POST /customers`, `PATCH /customers/{id}`), `details.errors[]` enumerates every invalid field so platforms can render form-field-level UX for the entire request in a single round-trip. properties: errors: type: array description: >- One entry per invalid field. Present on field-validation errors from submit endpoints. items: $ref: '#/components/schemas/FieldError' missingRequirements: type: array description: >- The requirement ID of each required document that the quote request did not supply. Present on `DOCUMENTS_REQUIRED`. items: $ref: '#/components/schemas/PaymentDocumentRequirementId' refusalReason: $ref: '#/components/schemas/RefusalReason' missingFields: type: array description: >- Each customer field the request needs but the customer record lacks, named as in `CustomerInfoFieldName` (for example `PHONE_NUMBER`). Present with refusal reason `CARDHOLDER_INFO_MISSING`. Grid may name fields not yet listed there. items: type: string example: PHONE_NUMBER additionalProperties: true Error401: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | UNAUTHORIZED | Issue with API credentials | | INVALID_SIGNATURE | Signature header is invalid | | WALLET_SIGNATURE_MISSING | The `Grid-Wallet-Signature` header is required for this Embedded Wallet action but was not supplied | | WALLET_SIGNATURE_MALFORMED | The `Grid-Wallet-Signature` header could not be parsed (bad encoding, structure, or fields) | | WALLET_SIGNATURE_BODY_MISMATCH | The `Grid-Wallet-Signature` was computed over a different request body than the one received | | WALLET_SIGNATURE_INVALID | The `Grid-Wallet-Signature` failed cryptographic verification against the registered credential | | REQUEST_ID_MISSING | The `Request-Id` header is required on the signed retry but was not supplied (paired with `Grid-Wallet-Signature`) | enum: - UNAUTHORIZED - INVALID_SIGNATURE - WALLET_SIGNATURE_MISSING - WALLET_SIGNATURE_MALFORMED - WALLET_SIGNATURE_BODY_MISMATCH - WALLET_SIGNATURE_INVALID - REQUEST_ID_MISSING reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error404: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | TRANSACTION_NOT_FOUND | Transaction not found | | INVITATION_NOT_FOUND | Invitation not found | | USER_NOT_FOUND | Customer not found | | QUOTE_NOT_FOUND | Quote not found | | LOOKUP_REQUEST_NOT_FOUND | Lookup request not found | | TOKEN_NOT_FOUND | Token not found | | BULK_UPLOAD_JOB_NOT_FOUND | Bulk upload job not found | | REFERENCE_NOT_FOUND | Reference not found | | UMA_NOT_FOUND | The UMA address is well-formed but no receiver exists at the counterparty VASP | | STABLECOIN_PROVIDER_ACCOUNT_NOT_FOUND | Stablecoin provider account link not found | | ACCOUNT_NOT_FOUND | Account not found | | AUTH_METHOD_NOT_FOUND | Authentication credential not found | | CUSTOMER_NOT_FOUND | Customer not found | | DOCUMENT_HOLDER_NOT_FOUND | Document holder not found | | NOT_FOUND | The requested resource was not found | | PAYMENT_URL_NOT_FOUND | Payment URL not found | | PLATFORM_NOT_FOUND | Platform not found | | REQUEST_NOT_FOUND | Pending request not found | | SESSION_NOT_FOUND | Session not found | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_FOUND | Stablecoin external account not found | | STABLECOIN_NOT_FOUND | Stablecoin not found | | STABLECOIN_OPERATION_NOT_FOUND | Stablecoin operation not found | | VERIFICATION_NOT_FOUND | Verification not found | | PAYMENT_DOCUMENT_NOT_FOUND | Payment document not found | enum: - TRANSACTION_NOT_FOUND - INVITATION_NOT_FOUND - USER_NOT_FOUND - QUOTE_NOT_FOUND - LOOKUP_REQUEST_NOT_FOUND - TOKEN_NOT_FOUND - BULK_UPLOAD_JOB_NOT_FOUND - REFERENCE_NOT_FOUND - UMA_NOT_FOUND - STABLECOIN_PROVIDER_ACCOUNT_NOT_FOUND - ACCOUNT_NOT_FOUND - AUTH_METHOD_NOT_FOUND - CUSTOMER_NOT_FOUND - DOCUMENT_HOLDER_NOT_FOUND - NOT_FOUND - PAYMENT_URL_NOT_FOUND - PLATFORM_NOT_FOUND - REQUEST_NOT_FOUND - SESSION_NOT_FOUND - STABLECOIN_EXTERNAL_ACCOUNT_NOT_FOUND - STABLECOIN_NOT_FOUND - STABLECOIN_OPERATION_NOT_FOUND - VERIFICATION_NOT_FOUND - PAYMENT_DOCUMENT_NOT_FOUND reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error500: type: object required: - reason - code properties: code: type: string description: | | Error Code | Description | |------------|-------------| | GRID_SWITCH_ERROR | Grid switch error | | INTERNAL_ERROR | Internal server or UMA error | enum: - GRID_SWITCH_ERROR - INTERNAL_ERROR reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true EmailOtpAdminCredentialCreateRequest: title: Email OTP Admin Credential Create Request allOf: - $ref: '#/components/schemas/AuthCredentialCreateRequest' - $ref: '#/components/schemas/AdminCredentialCreateRequestFields' - type: object required: - type - email properties: type: type: string enum: - EMAIL_OTP description: Discriminator value identifying this as an email OTP credential. email: type: string format: email maxLength: 255 description: >- The administrator's email address, which receives their one-time codes. Must differ from every other email credential on the account. example: admin@example.com PasskeyAdminCredentialCreateRequest: title: Passkey Admin Credential Create Request allOf: - $ref: '#/components/schemas/AuthCredentialCreateRequest' - $ref: '#/components/schemas/AdminCredentialCreateRequestFields' - $ref: '#/components/schemas/PasskeyCredentialCreateRequestFields' AuthMethod: type: object required: - id - accountId - type - nickname - createdAt - updatedAt properties: id: type: string description: >- System-generated unique identifier for the authentication credential. example: AuthMethod:019542f5-b3e7-1d02-0000-000000000001 accountId: type: string description: >- Identifier of the internal account that this credential authenticates. example: InternalAccount:019542f5-b3e7-1d02-0000-000000000002 type: $ref: '#/components/schemas/AuthMethodType' credentialId: type: string description: >- Base64url-encoded WebAuthn credential identifier for this passkey. Present only for `PASSKEY` authentication credentials. Corresponds to `PublicKeyCredential.rawId`; pass this value as `allowCredentials[].id` when requesting a passkey assertion for this auth method. example: >- KEbWNCc7NgaYnUyrNeFGX9_3Y-8oJ3KwzjnaiD1d1LVTxR7v3CaKfCz2Vy_g_MHSh7yJ8yL0Pxg6jo_o0hYiew nickname: type: string description: >- Human-readable identifier for this credential. For EMAIL_OTP credentials this is the email address; for SMS_OTP credentials this is the E.164 phone number; for OAUTH credentials it is typically the email claim from the OIDC token; for PASSKEY credentials it is the validated nickname provided at registration time. example: example@lightspark.com adminReference: type: string description: >- The platform's reference for the administrator this credential belongs to, for a credential added with `POST /auth/admin-credentials`. Absent for the account owner's credentials. example: member_8f2c1a createdAt: type: string format: date-time description: Creation timestamp. example: '2026-04-08T15:30:01Z' updatedAt: type: string format: date-time description: Last update timestamp. example: '2026-04-08T15:35:00Z' SignedRequestChallenge: title: Signed Request Challenge type: object required: - payloadToSign - requestId - expiresAt description: >- Common base for two-step signed-retry challenge responses on Embedded Wallet endpoints (credential registration or revocation, session refresh or revocation, wallet export, customer email updates, and similar). Holds the signing fields shared across every challenge shape; each variant composes this base via `allOf` and adds its own resource `id` (and `type`, when applicable) with variant-specific description and example. properties: payloadToSign: type: string description: >- Payload for the retry authorization stamp. Build an API-key stamp over the exact UTF-8 bytes of this string, without parsing, re-serializing, or trimming it. Use the keypair required by the endpoint: the client's TEK keypair for OTP verification, or an active session API keypair for other signed wallet actions. Send the full base64url-encoded stamp in `Grid-Wallet-Signature` on the retry that completes the original request. example: >- {"organizationId":"org_2m9F...","parameters":{"userId":"user_2m9F..."},"timestampMs":"1775681700000","type":"ACTIVITY_TYPE_EXAMPLE"} requestId: type: string description: >- Grid-issued `Request:` identifier for this pending request. Echo this value exactly in the `Request-Id` header on the signed retry so the server can correlate the retry with the issued challenge. example: Request:7c4a8d09-ca37-4e3e-9e0d-8c2b3e9a1f21 expiresAt: type: string format: date-time description: >- Timestamp after which this challenge is no longer valid. The signed retry must be submitted before this time. example: '2026-04-08T15:35:00Z' AuthMethodType: type: string enum: - OAUTH - EMAIL_OTP - SMS_OTP - PASSKEY description: >- The type of authentication credential. - `OAUTH`: OpenID Connect (OIDC) token issued by an identity provider such as Google or Apple. - `EMAIL_OTP`: A one-time password delivered to the user's email address. - `SMS_OTP`: A one-time password delivered to the user's phone number. - `PASSKEY`: A WebAuthn passkey bound to the user's device. FieldError: type: object required: - field description: >- One field-level validation failure. Field-validation errors on submit endpoints (e.g. `POST /customers`, `PATCH /customers/{id}`) emit an array of these under `details.errors` so platforms can render form-field-level UX for every failure in a single round-trip. properties: field: type: string description: Dot-notation path to the offending field. example: identifier constraint: $ref: '#/components/schemas/FieldConstraint' message: type: string description: Human-readable explanation of what's wrong with this field. example: Value is not one of the allowed enum members. PaymentDocumentRequirementId: type: string description: >- A stable identifier for one required document within a purpose's requirements. The same ID means the same requirement across quotes. It is separate from `PaymentDocumentType`. The requirement ID names the document to supply, and the document type names what a file is. The two differ where a requirement accepts alternatives. For example, a file declared as either `PURCHASE_ORDER` or `DELIVERY_SLIP` fills the `SUPPORTING_PROOF` requirement. [Supporting Documents](https://docs.lightspark.com/payouts-and-b2b/payment-flow/send-payment#supporting-documents) lists the IDs each purpose requires. Treat the ID as an opaque value, not a member of a fixed list. Grid may add new IDs as requirements change. example: SUPPORTING_PROOF RefusalReason: type: string description: > Why Grid refused the request, as `details.refusalReason`. Several refusals share one `code`, and `reason` is a message that may be reworded, so branch on this value rather than on `reason`. Treat it as an open set, not a fixed list: Grid may add values, and an unknown one is a refusal without a known cause. | Refusal reason | Status | Description | |----------------|--------|-------------| | `AGENT_API_DISABLED` | 403 | The agent API is not enabled for the platform | | `AGENT_CUSTOMER_INACTIVE` | 403 | The agent's customer is not active | | `AGENT_INACTIVE` | 403 | The agent is paused or deleted | | `AGENT_NO_DELEGATED_KEY` | 403 | The agent holds no active delegated key for the source wallet | | `AGENT_PERMISSION_REQUIRED` | 403 | The agent's policy lacks a permission this call needs. `details.permission` names it | | `AGENT_ACCOUNT_NOT_ALLOWED` | 403 | The agent's policy does not allow the source account or funding source | | `AGENT_DEPOSIT_ACCOUNT_NOT_ALLOWED` | 403 | The agent's policy does not allow deposits to this account | | `AGENT_POLICY_DENIED` | 403 | The agent's policy denied executing the quote. `details.policyDenialReason` says which rule | | `AGENT_QUOTE_HELD` | 403 | The quote cannot be sent and is held for manual follow-up | | `AGENT_CARDS_DISABLED` | 403 | Agent cards are not enabled for the platform | | `AGENT_CARDS_CUSTOMER_NOT_VERIFIED` | 403 | Agent cards need a verified individual customer | | `AGENT_CARD_HANDOVER_DISABLED` | 403 | Handing an agent's card over to its customer is not enabled for the platform | | `AGENT_PURCHASE_CARDS_DISABLED` | 403 | Agent purchase cards are not enabled for the platform | | `AGENT_RECURRING_PURCHASE_CARDS_DISABLED` | 403 | Agent recurring purchase cards are not enabled for the platform | | `AGENT_PURCHASE_CARD_POLICY_DENIED` | 403 | The agent's policy denied the purchase card. `details.policyDenialReason` says which rule | | `CARDS_DISABLED` | 403 | Cards are not enabled for the platform | | `CARDHOLDER_INFO_MISSING` | 400 | The cardholder record lacks fields a card needs. `details.missingFields` lists them; supply them through the customers API | | `CARDHOLDER_BANK_ACCOUNT_NOT_OPEN` | 400 | The cardholder's USD bank account is not open yet, so no card can be issued until it is | | `CARDHOLDER_COUNTRY_NOT_SUPPORTED` | 400 | The cardholder's address is outside the United States, where agent cards are not offered yet | | `CARDHOLDER_HOLDS_CARD` | 409 | The cardholder already holds a card and the platform allows one per cardholder. Close it before issuing another | | `INVOICE_SUB_SAT_AMOUNT` | 400 | The Lightning invoice's amount is not a whole number of satoshis | | `INVOICE_FUNDS_DEPOSIT` | 400 | The Lightning invoice was issued by Lightspark to fund a deposit and cannot be paid with a send | | `INVOICE_FUNDS_OWN_DEPOSIT` | 400 | The Lightning invoice funds a deposit of the sender's own. Quote a transfer between the customer's accounts instead | example: AGENT_POLICY_DENIED AuthCredentialCreateRequest: type: object required: - type - accountId properties: type: $ref: '#/components/schemas/AuthMethodType' accountId: type: string description: >- Identifier of the internal account that this credential will authenticate. example: InternalAccount:019542f5-b3e7-1d02-0000-000000000002 AdminCredentialCreateRequestFields: type: object required: - adminReference properties: adminReference: type: string minLength: 1 maxLength: 255 description: >- The platform's opaque reference for the administrator the credential belongs to, such as a member id. Grid stores it as given and uses it to revoke all of the administrator's credentials together. example: member_8f2c1a PasskeyCredentialCreateRequestFields: type: object required: - type - nickname - challenge - attestation properties: type: type: string enum: - PASSKEY description: Discriminator value identifying this as a passkey credential. nickname: type: string description: >- Human-readable identifier for the passkey, chosen by the user at registration time (e.g. "iPhone Face-ID", "YubiKey 5C"). Leading and trailing whitespace is ignored. Must be 1-100 characters and may contain Unicode letters, numbers, spaces, and the following separators: period, underscore, hyphen, apostrophe, and parentheses. Shown back on AuthMethod responses and in credential listings. example: iPhone Face-ID challenge: type: string description: >- Base64url-encoded WebAuthn challenge issued by the platform backend and passed to the client before `navigator.credentials.create()`. Grid verifies it matches the challenge embedded in the attestation's `clientDataJson`, binding the attestation to this registration. Must be single-use. example: ArkQi2yAYHPlgnJNFBlneIwchQdWXBOTrdB-AmMUB21Lx attestation: $ref: '#/components/schemas/PasskeyAttestation' FieldConstraint: type: object description: >- Machine-readable validator hint accompanying a 400 `INVALID_INPUT` error. Consumers use it to drive form UI (input types, dropdowns, masking, length limits) and to pre-validate the field client-side before re-submitting. Fields are additive. properties: format: type: string description: >- Named format the value must satisfy — HTML5 input type names (`email`, `tel`, `url`, `date`, ...) or semantic slugs (`iso3166-1-alpha-2`, `bcp47-language-tag`, `us-ssn`, `e.164`). example: email pattern: type: string description: Regular expression the value must match (JavaScript-flavor). example: ^\d{5}(-\d{4})?$ enum: type: array items: type: string description: Allowed values when the field is drawn from a fixed set. example: - SSN - ITIN - NON_US_TAX_ID minLength: type: integer description: Minimum length in characters. example: 1 maxLength: type: integer description: Maximum length in characters. example: 500 PasskeyAttestation: title: Passkey Attestation type: object required: - credentialId - clientDataJson - attestationObject properties: credentialId: type: string description: >- Base64url-encoded credential identifier produced by the authenticator at registration time. Typically the base64url of `PublicKeyCredential.rawId`. example: >- AdKXJEch1aV5Wo7bj7qLHskVY4OoNaj9qu8TPdJ7kSAgUeRxWNngXlcNIGt4gexZGKVGcqZpqqWordXb_he1izY clientDataJson: type: string description: >- Base64url-encoded JSON client data collected by the browser during the WebAuthn `navigator.credentials.create()` call. Corresponds to `AuthenticatorAttestationResponse.clientDataJSON` from the WebAuthn spec — Grid's field name is intentionally camelCased as `clientDataJson` (lowercase JSON) for consistency with the rest of the API; the value is the same bytes the browser returns. Contains the challenge, origin, and `type: "webauthn.create"`. example: >- eyJjaGFsbGVuZ2UiOiJBcktRaTJ5QVlIUGxnbkpORkJsbmVJd2NoUWRXWEJPVHJkQi1BbU1VQjIxTHgiLCJjbGllbnRFeHRlbnNpb25zIjp7fSwiaGFzaEFsZ29yaXRobSI6IlNIQS0yNTYiLCJvcmlnaW4iOiJodHRwczovL2Rldi5kb250bmVlZGEucHciLCJ0eXBlIjoid2ViYXV0aG4uY3JlYXRlIn0 attestationObject: type: string description: >- Base64url-encoded CBOR attestation object produced by the authenticator during registration. Corresponds to `AuthenticatorAttestationResponse.attestationObject`. example: >- o2NmbXRkbm9uZWdhdHRTdG10oGhhdXRoRGF0YVjFPdxHEOnAiLIp26idVjIguzn3Ipr_RlsKZWsa-5qK-KBFAAAAAAAAAAAAAAAAAAAAAAAAAAAAQQHSlyRHIdWleVqO24-6ix7JFWODqDWo_arvEz3Se5EgIFHkcVjZ4F5XDSBreIHsWRilRnKmaaqlqK3V2_4XtYs2pQECAyYgASFYID5PQTZQQg6haZFQWFzqfAOyQ_ENsMH8xxQ4GRiNPsqrIlggU8IVUOV8qpgk_Jh-OTaLuZL52KdX1fTht07X4DiQPow transports: type: array items: type: string enum: - usb - nfc - ble - internal - hybrid description: >- Optional. WebAuthn transports as returned by `AuthenticatorAttestationResponse.getTransports()`. Values follow the W3C `AuthenticatorTransport` enum — pass the raw values through to Grid; provider-specific translation is handled server-side. Some authenticators return an empty array; omit the field or send `[]` in that case. example: - internal - hybrid securitySchemes: BasicAuth: type: http scheme: basic description: >- API token authentication using format `:` AgentAuth: type: http scheme: bearer description: >- Bearer token authentication for agent-scoped endpoints. The token is the `accessToken` returned when redeeming a device code via `POST /agents/device-codes/redeem`. Agent credentials are user-scoped: all requests are automatically bound to the agent's associated customer and subject to the agent's policy. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.