> ## Documentation Index > Fetch the complete documentation index at: https://ramps-docs-sync-20260519.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Reject a pending incoming payment > Reject a pending incoming payment that was previously acknowledged with a 202 response. This endpoint allows platforms to asynchronously reject payments after additional processing. ## OpenAPI ````yaml https://app.stainless.com/api/spec/documented/grid/openapi.documented.yml post /transactions/{transactionId}/reject 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://grid.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: 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`. paths: /transactions/{transactionId}/reject: post: tags: - Transactions summary: Reject a pending incoming payment description: > Reject a pending incoming payment that was previously acknowledged with a 202 response. This endpoint allows platforms to asynchronously reject payments after additional processing. operationId: rejectPendingPayment parameters: - name: transactionId in: path description: Unique identifier of the transaction to reject required: true schema: type: string requestBody: required: false content: application/json: schema: $ref: '#/components/schemas/RejectPaymentRequest' responses: '200': description: Payment rejected successfully content: application/json: schema: $ref: '#/components/schemas/IncomingTransaction' '400': description: Bad request - Invalid parameters or payment cannot be rejected content: application/json: schema: $ref: '#/components/schemas/Error400' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error401' '404': description: Transaction not found content: application/json: schema: $ref: '#/components/schemas/Error404' '409': description: >- Conflict - Payment is not in a pending state or has already been processed or timed out. content: application/json: schema: $ref: '#/components/schemas/Error409' '500': description: Internal service error content: application/json: schema: $ref: '#/components/schemas/Error500' security: - BasicAuth: [] x-codeSamples: - lang: JavaScript source: >- import LightsparkGrid from '@lightsparkdev/grid'; const client = new LightsparkGrid({ username: process.env['GRID_CLIENT_ID'], // This is the default and can be omitted password: process.env['GRID_CLIENT_SECRET'], // This is the default and can be omitted }); const incomingTransaction = await client.transactions.reject('transactionId'); console.log(incomingTransaction.id); - lang: Python source: |- import os from grid import LightsparkGrid client = LightsparkGrid( username=os.environ.get("GRID_CLIENT_ID"), # This is the default and can be omitted password=os.environ.get("GRID_CLIENT_SECRET"), # This is the default and can be omitted ) incoming_transaction = client.transactions.reject( transaction_id="transactionId", ) print(incoming_transaction.id) - lang: Go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/stainless-sdks/grid-go\"\n\t\"github.com/stainless-sdks/grid-go/option\"\n)\n\nfunc main() {\n\tclient := grid.NewClient(\n\t\toption.WithUsername(\"My Username\"),\n\t\toption.WithPassword(\"My Password\"),\n\t)\n\tincomingTransaction, err := client.Transactions.Reject(\n\t\tcontext.TODO(),\n\t\t\"transactionId\",\n\t\tgrid.TransactionRejectParams{},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", incomingTransaction.ID)\n}\n" - lang: Kotlin source: >- package com.lightspark.grid.example import com.lightspark.grid.client.LightsparkGridClient import com.lightspark.grid.client.okhttp.LightsparkGridOkHttpClient import com.lightspark.grid.models.transactions.IncomingTransaction import com.lightspark.grid.models.transactions.TransactionRejectParams fun main() { val client: LightsparkGridClient = LightsparkGridOkHttpClient.fromEnv() val incomingTransaction: IncomingTransaction = client.transactions().reject("transactionId") } - lang: Ruby source: >- require "grid" lightspark_grid = Grid::Client.new(username: "My Username", password: "My Password") incoming_transaction = lightspark_grid.transactions.reject("transactionId") puts(incoming_transaction) - lang: PHP source: |- transactions->reject( 'transactionId', reason: 'RESTRICTED_JURISDICTION' ); var_dump($incomingTransaction); } catch (APIException $e) { echo $e->getMessage(); } - lang: C# source: >- using System; using Grid; using Grid.Models.Transactions; LightsparkGridClient client = new(); TransactionRejectParams parameters = new() { TransactionID = "transactionId" }; var incomingTransaction = await client.Transactions.Reject(parameters); Console.WriteLine(incomingTransaction); - lang: CLI source: |- grid transactions reject \ --username 'My Username' \ --password 'My Password' \ --transaction-id transactionId components: schemas: RejectPaymentRequest: type: object properties: reason: type: string description: >- Optional reason for rejecting the payment. This is just for debugging purposes or can be used for a platform's own purposes. example: RESTRICTED_JURISDICTION IncomingTransaction: title: Incoming Transaction allOf: - $ref: '#/components/schemas/Transaction' - type: object required: - type - receivedAmount properties: type: type: string enum: - INCOMING source: $ref: '#/components/schemas/TransactionSourceOneOf' receivedAmount: $ref: '#/components/schemas/CurrencyAmount' description: Amount received in the recipient's currency reconciliationInstructions: $ref: '#/components/schemas/ReconciliationInstructions' description: Included for all transactions except those with "CREATED" status rateDetails: $ref: '#/components/schemas/IncomingRateDetails' description: Details about the rate and fees for the transaction. failureReason: $ref: '#/components/schemas/IncomingTransactionFailureReason' description: >- If the transaction failed, this field provides the reason for failure. 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 | | PASSKEY_CREDENTIAL_ALREADY_EXISTS | A PASSKEY credential is already registered on the target internal account; only one passkey credential is supported per internal account in v1 | 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 - PASSKEY_CREDENTIAL_ALREADY_EXISTS 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 | enum: - UNAUTHORIZED - INVALID_SIGNATURE 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 | 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 message: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error409: type: object required: - message - status - code properties: status: type: integer enum: - 409 description: HTTP status code code: type: string description: > | Error Code | Description | |------------|-------------| | TRANSACTION_NOT_PENDING_PLATFORM_APPROVAL | Transaction is not pending platform approval | | UMA_ADDRESS_EXISTS | UMA address already exists | | EMAIL_OTP_EMAIL_ALREADY_EXISTS | Email address is already associated with an EMAIL_OTP credential | | EMAIL_OTP_CREDENTIAL_SET_CHANGED | Tied EMAIL_OTP credential set changed after the signed-retry challenge was issued | enum: - TRANSACTION_NOT_PENDING_PLATFORM_APPROVAL - UMA_ADDRESS_EXISTS - EMAIL_OTP_EMAIL_ALREADY_EXISTS - EMAIL_OTP_CREDENTIAL_SET_CHANGED 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 Transaction: type: object required: - id - status - type - destination - customerId - platformCustomerId properties: id: type: string description: Unique identifier for the transaction example: Transaction:019542f5-b3e7-1d02-0000-000000000004 status: $ref: '#/components/schemas/TransactionStatus' type: $ref: '#/components/schemas/TransactionType' destination: $ref: '#/components/schemas/TransactionDestinationOneOf' customerId: type: string description: >- System ID of the customer (sender for outgoing, recipient for incoming) example: Customer:019542f5-b3e7-1d02-0000-000000000001 platformCustomerId: type: string description: >- Platform-specific ID of the customer (sender for outgoing, recipient for incoming) example: 18d3e5f7b4a9c2 settledAt: type: string format: date-time description: When the payment was or will be settled example: '2025-08-15T14:30:00Z' createdAt: type: string format: date-time description: When the transaction was created example: '2025-08-15T14:25:18Z' updatedAt: type: string format: date-time description: When the transaction was last updated example: '2025-08-15T14:30:00Z' agentId: type: string description: >- If this transaction was initiated by an agent, the system-generated ID of that agent. Absent for platform-initiated transactions. example: Agent:019542f5-b3e7-1d02-0000-000000000042 description: type: string description: Optional memo or description for the payment example: 'Payment for invoice #1234' counterpartyInformation: $ref: '#/components/schemas/CounterpartyInformation' TransactionSourceOneOf: oneOf: - $ref: '#/components/schemas/AccountTransactionSource' - $ref: '#/components/schemas/UmaAddressTransactionSource' - $ref: '#/components/schemas/RealtimeFundingTransactionSource' discriminator: propertyName: sourceType mapping: ACCOUNT: $ref: '#/components/schemas/AccountTransactionSource' UMA_ADDRESS: $ref: '#/components/schemas/UmaAddressTransactionSource' REALTIME_FUNDING: $ref: '#/components/schemas/RealtimeFundingTransactionSource' CurrencyAmount: type: object required: - amount - currency properties: amount: type: integer format: int64 description: >- Amount in the smallest unit of the currency (e.g., cents for USD/EUR, satoshis for BTC) example: 12550 currency: $ref: '#/components/schemas/Currency' ReconciliationInstructions: type: object required: - reference properties: reference: type: string description: >- Unique reference code that must be included with the payment to match it with the correct incoming transaction example: UMA-Q12345-REF IncomingRateDetails: description: >- Details about the rate and fees for an incoming transaction. Note: `gridApiFixedFee` is denominated in the receiving currency, so its equivalent value in the sending currency fluctuates with the FX rate. As a result, the total fee on a subsequent quote for the same transfer may differ even if the underlying fee structure is unchanged. type: object required: - gridApiMultiplier - gridApiFixedFee - gridApiVariableFeeRate - gridApiVariableFeeAmount properties: gridApiMultiplier: type: number format: double description: >- The underlying multiplier from the mSATS to the receiving currency, including variable fees. exclusiveMinimum: 0 example: 0.925 gridApiFixedFee: type: integer format: int64 description: >- The fixed fee charged by the Grid product to execute the quote in the smallest unit of the receiving currency (eg. cents). minimum: 0 example: 10 gridApiVariableFeeRate: type: number format: double description: >- The variable fee rate charged by the Grid product to execute the quote as a percentage of the receiving currency amount. minimum: 0 example: 0.003 gridApiVariableFeeAmount: type: number format: int64 description: >- The variable fee amount charged by the Grid product to execute the quote in the smallest unit of the receiving currency (eg. cents). This is the receiving amount times gridApiVariableFeeRate. minimum: 0 example: 30 IncomingTransactionFailureReason: type: string enum: - LNURLP_FAILED - PAY_REQUEST_FAILED - PAYMENT_APPROVAL_WEBHOOK_ERROR - PAYMENT_APPROVAL_TIMED_OUT - OFFRAMP_FAILED - MISSING_MANDATORY_PAYEE_DATA - QUOTE_EXPIRED - QUOTE_EXECUTION_FAILED description: >- Reason for failure of an incoming transaction. This is used to provide more context on why a transaction failed. If the transaction is not in a failed state, this field is omitted. TransactionStatus: type: string enum: - CREATED - PENDING - PROCESSING - COMPLETED - REJECTED - FAILED - REFUNDED - EXPIRED description: > Status of a payment transaction. | Status | Description | |--------|-------------| | `CREATED` | Initial lookup has been created | | `PENDING` | Quote has been created | | `PROCESSING` | Funding has been received and payment initiated | | `COMPLETED` | Cross border payment has been received, converted and payment has been sent to the offramp network | | `REJECTED` | Receiving institution or wallet rejected payment, payment has been refunded | | `FAILED` | An error occurred during payment | | `REFUNDED` | Payment was unable to complete and refunded | | `EXPIRED` | Quote has expired | TransactionType: type: string enum: - INCOMING - OUTGOING description: Type of transaction (incoming payment or outgoing payment) TransactionDestinationOneOf: oneOf: - $ref: '#/components/schemas/AccountTransactionDestination' - $ref: '#/components/schemas/UmaAddressTransactionDestination' discriminator: propertyName: destinationType mapping: ACCOUNT: $ref: '#/components/schemas/AccountTransactionDestination' UMA_ADDRESS: $ref: '#/components/schemas/UmaAddressTransactionDestination' CounterpartyInformation: type: object description: >- Additional information about the counterparty, if available and relevant to the transaction and platform. additionalProperties: true example: FULL_NAME: John Sender BIRTH_DATE: '1985-06-15' NATIONALITY: DE AccountTransactionSource: title: Account Source allOf: - $ref: '#/components/schemas/BaseTransactionSource' - type: object required: - accountId - sourceType properties: sourceType: type: string enum: - ACCOUNT accountId: type: string description: Source account identifier example: InternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965 description: Source account details UmaAddressTransactionSource: title: UMA Address Source allOf: - $ref: '#/components/schemas/BaseTransactionSource' - type: object required: - umaAddress - sourceType properties: sourceType: type: string enum: - UMA_ADDRESS umaAddress: type: string description: UMA address of the sender example: $sender@uma.domain.com description: UMA address source details RealtimeFundingTransactionSource: title: Real-time Funding Source allOf: - $ref: '#/components/schemas/BaseTransactionSource' - type: object required: - currency - sourceType properties: sourceType: type: string enum: - REALTIME_FUNDING customerId: type: string description: The customer on whose behalf the transaction was initiated. example: Customer:019542f5-b3e7-1d02-0000-000000000009 currency: type: string description: Currency code for the funding source example: USDC description: >- Transaction was funded using a real-time funding source (RTP, SEPA Instant, Spark, Stables, etc.). Currency: type: object properties: code: type: string description: >- Three-letter currency code (ISO 4217) for fiat currencies. Some cryptocurrencies may use their own ticker symbols (e.g. "BTC" for Bitcoin, "USDC" for USDC, etc.) example: USD name: type: string description: Full name of the currency example: United States Dollar symbol: type: string description: Symbol of the currency example: $ decimals: type: integer description: Number of decimal places for the currency minimum: 0 example: 2 AccountTransactionDestination: title: Account Destination allOf: - $ref: '#/components/schemas/BaseTransactionDestination' - type: object required: - accountId - destinationType properties: destinationType: type: string enum: - ACCOUNT accountId: type: string description: Destination account identifier example: ExternalAccount:a12dcbd6-dced-4ec4-b756-3c3a9ea3d123 description: Destination account details UmaAddressTransactionDestination: title: UMA Address Destination allOf: - $ref: '#/components/schemas/BaseTransactionDestination' - type: object required: - umaAddress - destinationType properties: destinationType: type: string enum: - UMA_ADDRESS umaAddress: type: string description: UMA address of the recipient example: $receiver@uma.domain.com description: UMA address destination details BaseTransactionSource: type: object required: - sourceType properties: sourceType: $ref: '#/components/schemas/TransactionSourceType' currency: type: string description: Currency code for the source example: USD BaseTransactionDestination: type: object required: - destinationType properties: destinationType: $ref: '#/components/schemas/TransactionDestinationType' currency: type: string description: Currency code for the destination example: EUR TransactionSourceType: type: string enum: - ACCOUNT - UMA_ADDRESS - REALTIME_FUNDING description: Type of transaction source example: ACCOUNT TransactionDestinationType: type: string enum: - ACCOUNT - UMA_ADDRESS description: Type of transaction destination example: ACCOUNT 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. ````