Webhooks

Outgoing payment status webhook

Webhook that is called when an outgoing payment's status changes. A side's railDetails carries the rail-level status of that leg; for example, a payout the receiving bank returns arrives as OUTGOING_PAYMENT.FAILED with destination.railDetails.status set to RETURNED, and the payout is refunded to its source. A returned payout stays FAILED even if the originating bank later dishonors the return: the refund has already been posted, so the funds are reconciled manually. The dishonor is still reported: OUTGOING_PAYMENT.FAILED is sent again with railDetails.status set to RETURN_DISHONORED and dishonoredAt set. This endpoint should be implemented by clients of the Grid API.

Authentication

The webhook includes a signature in the X-Grid-Signature header that allows you to verify that the webhook was sent by Grid. To verify the signature:

Get the Grid public key provided to you during integration
Decode the base64 signature from the header
Create a SHA-256 hash of the request body
Verify the signature using the public key and the hash

If the signature verification succeeds, the webhook is authentic. If not, it should be rejected.

This webhook is informational only and is sent when an outgoing payment completes successfully, fails, or is refunded.

postWebhookoutgoing-payment

Payload

idstring required

Unique identifier for this webhook delivery (can be used for idempotency)

Type of webhook event in OBJECT.EVENT dot-notation. The part before the dot identifies the resource, the part after identifies the event. This lets consumers route purely on type without inspecting data.status. CARD_AUTHORIZATION.REQUEST is a synchronous decision request that Grid sends only while cardConfigs.realTimeAuthorization is set.

timestampstring date-time required

ISO 8601 timestamp of when the webhook was sent

Example payload

{
  "id": "Webhook:019542f5-b3e7-1d02-0000-000000000007",
  "timestamp": "2025-08-15T14:32:00Z",
  "data": {
    "id": "Transaction:019542f5-b3e7-1d02-0000-000000000004",
    "destination": {
      "destinationType": "ACCOUNT",
      "currency": "EUR",
      "accountId": "ExternalAccount:a12dcbd6-dced-4ec4-b756-3c3a9ea3d123",
      "railDetails": {
        "transactionHash": "h82pJGF9p7kpzb6eU326EFZf2cDnimbTFVeJtx1qtBmUNJAEqN76R7PwPfHt3oWb8R6cKvhgyxQdDn53jFrK6wFx",
        "network": "SOLANA"
      },
      "onChainTransaction": {
        "transactionHash": "h82pJGF9p7kpzb6eU326EFZf2cDnimbTFVeJtx1qtBmUNJAEqN76R7PwPfHt3oWb8R6cKvhgyxQdDn53jFrK6wFx",
        "network": "SOLANA"
      }
    },
    "ruleBasedAccountId": "InternalAccount:019542f5-b3e7-1d02-0000-000000000011",
    "customerId": "Customer:019542f5-b3e7-1d02-0000-000000000001",
    "platformCustomerId": "18d3e5f7b4a9c2",
    "settledAt": "2025-08-15T14:30:00Z",
    "createdAt": "2025-08-15T14:25:18Z",
    "updatedAt": "2025-08-15T14:30:00Z",
    "receiptDeliveryConfirmedAt": "2025-08-15T14:31:00Z",
    "agentId": "Agent:019542f5-b3e7-1d02-0000-000000000042",
    "description": "Payment for invoice #1234",
    "sentAmount": {
      "amount": 12550,
      "currency": {
        "code": "USD",
        "name": "United States Dollar",
        "symbol": "$",
        "decimals": 2
      }
    },
    "exchangeRate": 1.08,
    "quoteId": "Quote:019542f5-b3e7-1d02-0000-000000000006",
    "refund": {
      "reference": "UMA-Q12345-REFUND",
      "initiatedAt": "2025-08-15T14:30:00Z",
      "settledAt": "2025-08-15T14:35:00Z",
      "status": "COMPLETED",
      "reason": "TRANSACTION_FAILED"
    },
    "counterpartyInformation": {
      "FULL_NAME": "John Sender",
      "BIRTH_DATE": "1985-06-15",
      "NATIONALITY": "DE"
    },
    "source": {
      "sourceType": "ACCOUNT",
      "currency": "USD",
      "accountId": "InternalAccount:e85dcbd6-dced-4ec4-b756-3c3a9ea3d965",
      "railDetails": {
        "transactionHash": "h82pJGF9p7kpzb6eU326EFZf2cDnimbTFVeJtx1qtBmUNJAEqN76R7PwPfHt3oWb8R6cKvhgyxQdDn53jFrK6wFx",
        "network": "SOLANA"
      },
      "onChainTransaction": {
        "transactionHash": "h82pJGF9p7kpzb6eU326EFZf2cDnimbTFVeJtx1qtBmUNJAEqN76R7PwPfHt3oWb8R6cKvhgyxQdDn53jFrK6wFx",
        "network": "SOLANA"
      }
    },
    "receivedAmount": {
      "amount": 12550,
      "currency": {
        "code": "USD",
        "name": "United States Dollar",
        "symbol": "$",
        "decimals": 2
      }
    },
    "fees": 10,
    "platformFees": 5,
    "reconciliationInstructions": {
      "reference": "UMA-Q12345-REF",
      "transactionHash": "0x9f2c6b6f4b6c8f2a8d9e0b1c2d3e4f5061728394a5b6c7d8e9f00112233445566"
    },
    "paymentInstructions": [
      {
        "accountOrWalletInfo": {
          "accountType": "USD_ACCOUNT",
          "paymentRails": [
            "ACH",
            "WIRE"
          ],
          "accountNumber": "1234567890",
          "routingNumber": "021000021",
          "bankName": "Chase Bank",
          "reference": "UMA-Q12345-REF"
        },
        "instructionsNotes": "Include reference UMA-Q12345-REF in memo"
      },
      {
        "accountOrWalletInfo": {
          "accountType": "SPARK_WALLET",
          "assetType": "BTC",
          "address": "spark1pgssyuuuhnrrdjswal5c3s3rafw9w3y5dd4cjy3duxlf7hjzkp0rqx6dj6mrhu",
          "invoice": "lnbc15u1p3xnhl2pp5jptserfk3zk4qy42tlucycrfwxhydvlemu9pqr93tuzlv9cc7g3sdqsvfhkcap3xyhx7un8cqzpgxqzjcsp5f8c52y2stc300gl6s4xswtjpc37hrnnr3c9wvtgjfuvqmpm35evq9qyyssqy4lgd8tj637qcjp05rdpxxykjenthxftej7a2zzmwrmrl70fyj9hvj0rewhzj7jfyuwkwcg9g2jpwtk3wkjtwnkdks84hsnu8xps5vsq4gj5hs"
        }
      }
    ],
    "rateDetails": {
      "counterpartyMultiplier": 1.08,
      "counterpartyFixedFee": 10,
      "gridApiMultiplier": 0.925,
      "gridApiFixedFee": 10,
      "gridApiVariableFeeRate": 0.003,
      "gridApiVariableFeeAmount": 30
    },
    "paymentRail": "ACH",
    "railSelectionMode": "AUTO"
  }
}

Response

Webhook received successfully

Changes

Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.