> ## 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. # Simulate a card authorization advice > Simulate an `AUTHORIZATION_ADVICE` that re-sizes an existing open authorization on a `CardTransaction` in the sandbox environment. The `amount` is the new *total* authorized amount the advice re-sizes to. The parent transaction must be in `AUTHORIZED` or `PARTIALLY_SETTLED` state. The resulting card operation is delivered asynchronously via the issuer's events webhook. Production returns `404` on this path. ## OpenAPI ````yaml https://app.stainless.com/api/spec/documented/grid/openapi.documented.yml post /sandbox/cards/{id}/simulate/authorization_advice 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: External Accounts description: >- External account management endpoints for creating and managing external bank accounts - name: Same-Currency Transfers description: >- Endpoints for transferring funds between internal and external accounts with the same currency - name: Cross-Currency Transfers description: Endpoints for creating and confirming quotes for cross-currency transfers - 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: >- 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: Cards description: >- Card management endpoints. Issue debit cards against an internal account, freeze / unfreeze, close, manage card funding sources, and list card transactions. - name: Stablecoins description: >- Stablecoin issuance endpoints. Link provider accounts, register provider-created stablecoins, create mint/burn quotes, execute them, and track the resulting operations. paths: /sandbox/cards/{id}/simulate/authorization_advice: post: tags: - Sandbox summary: Simulate a card authorization advice description: > Simulate an `AUTHORIZATION_ADVICE` that re-sizes an existing open authorization on a `CardTransaction` in the sandbox environment. The `amount` is the new *total* authorized amount the advice re-sizes to. The parent transaction must be in `AUTHORIZED` or `PARTIALLY_SETTLED` state. The resulting card operation is delivered asynchronously via the issuer's events webhook. Production returns `404` on this path. operationId: sandboxSimulateCardAuthorizationAdvice parameters: - name: id in: path required: true description: The id of the card the advice applies to. schema: type: string example: Card:019542f5-b3e7-1d02-0000-000000000010 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/SandboxCardAuthorizationAdviceRequest' examples: resizeUp: summary: Re-size an open auth up to a new total of $20.00 value: cardTransactionId: CardTransaction:019542f5-b3e7-1d02-0000-000000000100 amount: 2000 responses: '202': description: >- Simulation accepted. The resulting card operation is delivered asynchronously via the issuer's events webhook. Returns the issuer transaction token that correlates the simulated event. content: application/json: schema: $ref: '#/components/schemas/SandboxCardSimulationResponse' '400': description: Bad request - Invalid parameters content: application/json: schema: $ref: '#/components/schemas/Error400' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error401' '403': description: Forbidden - request was made with a production platform token content: application/json: schema: $ref: '#/components/schemas/Error403' '404': description: Card or card transaction 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: SandboxCardAuthorizationAdviceRequest: type: object required: - cardTransactionId - amount description: >- Sandbox-only request body for `POST /sandbox/cards/{id}/simulate/authorization_advice`. Drives an `AUTHORIZATION_ADVICE` that re-sizes an existing open authorization. properties: cardTransactionId: type: string description: >- The id of the `CardTransaction` the advice re-sizes. Must be in `AUTHORIZED` or `PARTIALLY_SETTLED` state. example: CardTransaction:019542f5-b3e7-1d02-0000-000000000100 amount: type: integer format: int64 description: >- The new *total* authorized amount, in the smallest unit of the transaction's currency, that the advice re-sizes the authorization to. exclusiveMinimum: 0 example: 2000 SandboxCardSimulationResponse: type: object required: - issuerTransactionToken description: >- Response body for the sandbox card-event simulators. The simulate call pokes the card issuer's sandbox; the resulting card operation is delivered asynchronously via the issuer's events webhook, never synchronously in this response. properties: issuerTransactionToken: type: string description: >- The card issuer's transaction token for the simulated event. Correlates the eventual webhook-delivered card operation back to this simulate call. example: f3a1c2d4-5b6e-7890-abcd-ef0123456789 Error400: type: object required: - message - status - code properties: status: type: integer enum: - 400 description: HTTP status code code: type: string description: > | Error Code | Description | |------------|-------------| | INVALID_INPUT | Invalid input provided | | 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 | | QUOTE_REQUEST_FAILED | An issue occurred during the quote process; this is retryable | | INVALID_PAYREQ_RESPONSE | Counterparty Payreq response was invalid | | 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 | Sender is not accepted | | 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 | | LOOKUP_REQUEST_FAILED | Lookup request failed | | 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 | An EMAIL_OTP credential is already registered on the target internal account; only one email OTP credential is supported per internal account at this time | | 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 | | 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 | enum: - INVALID_INPUT - MISSING_MANDATORY_USER_INFO - INVITATION_ALREADY_CLAIMED - INVITATIONS_NOT_CONFIGURED - INVALID_UMA_ADDRESS - INVITATION_CANCELLED - QUOTE_REQUEST_FAILED - INVALID_PAYREQ_RESPONSE - 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 - LOOKUP_REQUEST_FAILED - 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 - STABLECOIN_PROVIDER_ACCOUNT_INVALID - STABLECOIN_PROVIDER_ACCOUNT_REVOKED - STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error401: type: object required: - message - status - code properties: status: type: integer enum: - 401 description: HTTP status code 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 message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error403: type: object required: - message - status - code properties: status: type: integer enum: - 403 description: HTTP status code code: type: string description: > | Error Code | Description | |------------|-------------| | FORBIDDEN | Insufficient permissions | | USER_NOT_READY | Customer exists but is not ready for operation | | COUNTERPARTY_NOT_ALLOWED | Counterparty has not been enabled for your account | | VELOCITY_LIMIT_EXCEEDED | Counterparty has exceeded velocity limits | enum: - FORBIDDEN - USER_NOT_READY - COUNTERPARTY_NOT_ALLOWED - VELOCITY_LIMIT_EXCEEDED message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error404: type: object required: - message - status - code properties: status: type: integer enum: - 404 description: HTTP status code 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 | 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 message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error500: type: object required: - message - status - code properties: status: type: integer enum: - 500 description: HTTP status code 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 message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true 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/{code}/redeem`. Agent credentials are user-scoped: all requests are automatically bound to the agent's associated customer and subject to the agent's policy. ````