> ## 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. # Reveal card details > Mint a signed, short-lived URL for the card processor's iframe that displays the card's full PAN, CVV, and expiry to the cardholder. This is the only way to obtain a reveal URL — the `Card` resource never carries one. Request the reveal right before rendering the iframe and render the returned `panEmbedUrl` immediately; it expires at `expiresAt` (within minutes). Never store, cache, or log the URL — it is a bearer secret for the full card details. The card data renders inside the processor's iframe and never crosses Grid's or your servers. Every reveal is audit-logged with the requesting actor. ## OpenAPI ````yaml https://app.stainless.com/api/spec/documented/grid/openapi.documented.yml post /cards/{id}/reveal 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: '2026-06-29' 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: 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: /cards/{id}/reveal: parameters: - name: id in: path description: System-generated unique card identifier required: true schema: type: string post: tags: - Cards summary: Reveal card details description: >- Mint a signed, short-lived URL for the card processor's iframe that displays the card's full PAN, CVV, and expiry to the cardholder. This is the only way to obtain a reveal URL — the `Card` resource never carries one. Request the reveal right before rendering the iframe and render the returned `panEmbedUrl` immediately; it expires at `expiresAt` (within minutes). Never store, cache, or log the URL — it is a bearer secret for the full card details. The card data renders inside the processor's iframe and never crosses Grid's or your servers. Every reveal is audit-logged with the requesting actor. operationId: revealCard responses: '200': description: Reveal URL minted. content: application/json: schema: $ref: '#/components/schemas/CardRevealResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error401' '403': description: >- Forbidden. The session has no attributable actor to audit the reveal against (for example, an impersonated dashboard session). content: application/json: schema: $ref: '#/components/schemas/Error403' '404': description: Card not found content: application/json: schema: $ref: '#/components/schemas/Error404' '500': description: Internal service error content: application/json: schema: $ref: '#/components/schemas/Error500' '501': description: >- Not implemented in this environment. Cards are not enabled for every Grid deployment; environments without a configured card issuer return `501 NOT_IMPLEMENTED`. content: application/json: schema: $ref: '#/components/schemas/Error501' security: - BasicAuth: [] components: schemas: CardRevealResponse: type: object required: - panEmbedUrl - expiresAt properties: panEmbedUrl: type: string format: uri description: >- Signed URL of the card processor's iframe that securely displays the PAN, CVV, and expiry to the cardholder. The full PAN and CVV never cross Grid's servers — render this URL in an iframe in your client to reveal card details. The URL is a short-lived bearer secret: render it immediately and never store, cache, or log it. example: https://embed.lithic.com/iframe/...?t=... expiresAt: type: string format: date-time description: >- When the signed URL stops loading. Request a new reveal rather than re-rendering an expired URL. example: '2026-05-08T14:16:00Z' 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 Error501: type: object required: - message - status - code properties: status: type: integer enum: - 501 description: HTTP status code code: type: string description: > | Error Code | Description | |------------|-------------| | UNRECOGNIZED_MANDATORY_PAYEE_DATA_KEY | Unrecognized mandatory payee data key | | NOT_IMPLEMENTED | Feature not implemented | enum: - UNRECOGNIZED_MANDATORY_PAYEE_DATA_KEY - NOT_IMPLEMENTED 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. ````