Brex · AsyncAPI Specification

Brex Webhooks API

Version 0.1

AsyncAPI 2.6 description of the Brex Webhooks surface. Brex uses webhooks to deliver real-time notifications when events happen in the accounts that you manage. Subscribers register an HTTPS callback URL via the Webhooks API (Subscriptions endpoints) and select one or more event types from the `WebhookEventType` enum. Brex POSTs JSON payloads to the registered URL when matching events occur; subscribers respond with a 200 status code to confirm receipt. Incoming requests can be validated using the secrets returned from `GET /v1/webhooks/secrets`.

View Spec View on GitHub Bill PayCorporate CardsExpensesReimbursementsSpendingAsyncAPIWebhooksEvents

Channels

accountingRecordReadyForExport
publish onAccountingRecordReadyForExport
Accounting Record Ready For Export Event
Fired when a list of accounting records is ready for export. Sent to the subscriber callback URL via HTTPS POST.
expensePaymentUpdated
publish onExpensePaymentUpdated
Expense Payment Updated Event
Fired when an expense payment changes status on a Brex Card. Subscription must be registered with a user with the CARD_ADMIN role.
referralActivated
publish onReferralActivated
Referral Activated Event
Fired when a user signs up with the referral link.
referralApplicationStatusChanged
publish onReferralApplicationStatusChanged
Referral Application Status Changed Event
Fired when the application status of a referral changes.
referralCreated
publish onReferralCreated
Referral Created Event
Fired when a referral is created.
transferFailed
publish onTransferFailed
Transfer Failed Event
Fired when a transfer fails. Covers incoming and outgoing Brex Cash transactions and supports ACH, DOMESTIC_WIRE, CHEQUE, INTERNATIONAL_WIRE, BOOK_TRANSFER, STABLECOIN, and the ACH_RETURN / WIRE_RETURN / CHEQUE_RETURN return types.
transferProcessed
publish onTransferProcessed
Transfer Processed Event
Fired when a transfer is processed. Covers incoming and outgoing Brex Cash transactions across the same payment types as `transferFailed`.
userUpdated
publish onUserUpdated
User Updated Event
Fired when a Brex user is updated. The payload lists which user attributes changed (STATUS, MANAGER_ID, DEPARTMENT_ID, LOCATION_ID).

Messages

✉
AccountingRecordReadyForExport
Accounting Record Ready For Export
A list of accounting records are ready for export.
✉
ExpensePaymentUpdated
Expense Payment Updated
An expense payment changed status on a Brex Card.
✉
ReferralActivated
Referral Activated
A user signed up with a referral link.
✉
ReferralApplicationStatusChanged
Referral Application Status Changed
A referral's application status changed.
✉
ReferralCreated
Referral Created
A referral was created.
✉
TransferFailed
Transfer Failed
A Brex Cash transfer failed.
✉
TransferProcessed
Transfer Processed
A Brex Cash transfer was processed.
✉
UserUpdated
User Updated
A Brex user was updated.

Servers

https
subscriber {webhookUrl}
The HTTPS endpoint that the subscriber registers with Brex via `POST /v1/webhooks`. Brex delivers webhook events by sending HTTPS POST requests to this URL. Must be a valid HTTPS URL.

AsyncAPI Specification

Raw ↑ 
asyncapi: '2.6.0'
id: 'urn:com:brex:webhooks'
info:
  title: Brex Webhooks API
  version: '0.1'
  description: >
    AsyncAPI 2.6 description of the Brex Webhooks surface. Brex uses webhooks to
    deliver real-time notifications when events happen in the accounts that you
    manage. Subscribers register an HTTPS callback URL via the Webhooks API
    (Subscriptions endpoints) and select one or more event types from the
    `WebhookEventType` enum. Brex POSTs JSON payloads to the registered URL when
    matching events occur; subscribers respond with a 200 status code to confirm
    receipt. Incoming requests can be validated using the secrets returned from
    `GET /v1/webhooks/secrets`.
  contact:
    name: Brex Developer Support
    url: https://developer.brex.com/
    email: [email protected]
  license:
    name: Proprietary
  x-generated-from: https://developer.brex.com/openapi/webhooks_api/
  x-source-bundle: https://developer.brex.com/_bundle/openapi/webhooks_api.yaml
  x-generated-by: claude-crawl-2026-05-30
  x-api-evangelist:
    aid: brex:brex-webhooks
    note: >
      Only the event types and payload schemas that are explicitly documented in
      the Brex Webhooks OpenAPI bundle are modeled here. The WebhookEventType
      enum contains additional values used by the Brex Embedded program
      (EMBEDDED_* and PARTNERSHIP_INTEGRATION_CONNECTION_UPDATED) for which Brex
      does not publish public payload schemas; those values are kept in the enum
      but not bound to dedicated channels.
defaultContentType: application/json
servers:
  subscriber:
    url: '{webhookUrl}'
    protocol: https
    description: >
      The HTTPS endpoint that the subscriber registers with Brex via
      `POST /v1/webhooks`. Brex delivers webhook events by sending HTTPS POST
      requests to this URL. Must be a valid HTTPS URL.
    variables:
      webhookUrl:
        default: https://example.com/webhook
        description: The subscriber-controlled HTTPS callback URL.
channels:
  accountingRecordReadyForExport:
    description: >-
      Fired when a list of accounting records is ready for export. Sent to the
      subscriber callback URL via HTTPS POST.
    publish:
      operationId: onAccountingRecordReadyForExport
      summary: Accounting Record Ready For Export Event
      description: A list of accounting records are ready for export.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/AccountingRecordReadyForExport'
  expensePaymentUpdated:
    description: >-
      Fired when an expense payment changes status on a Brex Card. Subscription
      must be registered with a user with the CARD_ADMIN role.
    publish:
      operationId: onExpensePaymentUpdated
      summary: Expense Payment Updated Event
      description: Expense activity on Brex Cards.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/ExpensePaymentUpdated'
  referralActivated:
    description: Fired when a user signs up with the referral link.
    publish:
      operationId: onReferralActivated
      summary: Referral Activated Event
      description: A referral was activated.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/ReferralActivated'
  referralApplicationStatusChanged:
    description: Fired when the application status of a referral changes.
    publish:
      operationId: onReferralApplicationStatusChanged
      summary: Referral Application Status Changed Event
      description: A referral's application status changed.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/ReferralApplicationStatusChanged'
  referralCreated:
    description: Fired when a referral is created.
    publish:
      operationId: onReferralCreated
      summary: Referral Created Event
      description: A referral was created.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/ReferralCreated'
  transferFailed:
    description: >-
      Fired when a transfer fails. Covers incoming and outgoing Brex Cash
      transactions and supports ACH, DOMESTIC_WIRE, CHEQUE, INTERNATIONAL_WIRE,
      BOOK_TRANSFER, STABLECOIN, and the ACH_RETURN / WIRE_RETURN /
      CHEQUE_RETURN return types.
    publish:
      operationId: onTransferFailed
      summary: Transfer Failed Event
      description: >-
        Transfer failed events for both incoming and outgoing Brex Cash
        transactions.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/TransferFailed'
  transferProcessed:
    description: >-
      Fired when a transfer is processed. Covers incoming and outgoing Brex Cash
      transactions across the same payment types as `transferFailed`.
    publish:
      operationId: onTransferProcessed
      summary: Transfer Processed Event
      description: >-
        Transfer processed events for both incoming and outgoing Brex Cash
        transactions.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/TransferProcessed'
  userUpdated:
    description: >-
      Fired when a Brex user is updated. The payload lists which user attributes
      changed (STATUS, MANAGER_ID, DEPARTMENT_ID, LOCATION_ID).
    publish:
      operationId: onUserUpdated
      summary: User Updated Event
      description: Updates on Brex users.
      bindings:
        http:
          type: request
          method: POST
          bindingVersion: '0.3.0'
      message:
        $ref: '#/components/messages/UserUpdated'
components:
  messages:
    AccountingRecordReadyForExport:
      name: AccountingRecordReadyForExport
      title: Accounting Record Ready For Export
      summary: A list of accounting records are ready for export.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/AccountingRecordReadyForExport'
    ExpensePaymentUpdated:
      name: ExpensePaymentUpdated
      title: Expense Payment Updated
      summary: An expense payment changed status on a Brex Card.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/ExpensePaymentUpdated'
    ReferralActivated:
      name: ReferralActivated
      title: Referral Activated
      summary: A user signed up with a referral link.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/ReferralActivated'
    ReferralApplicationStatusChanged:
      name: ReferralApplicationStatusChanged
      title: Referral Application Status Changed
      summary: A referral's application status changed.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/ReferralApplicationStatusChanged'
    ReferralCreated:
      name: ReferralCreated
      title: Referral Created
      summary: A referral was created.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/ReferralCreated'
    TransferFailed:
      name: TransferFailed
      title: Transfer Failed
      summary: A Brex Cash transfer failed.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/TransferFailed'
    TransferProcessed:
      name: TransferProcessed
      title: Transfer Processed
      summary: A Brex Cash transfer was processed.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/TransferProcessed'
    UserUpdated:
      name: UserUpdated
      title: User Updated
      summary: A Brex user was updated.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/UserUpdated'
  schemas:
    WebhookEventType:
      type: string
      description: >-
        The full set of webhook event type identifiers recognized by Brex. The
        Brex Embedded program (EMBEDDED_* and
        PARTNERSHIP_INTEGRATION_CONNECTION_UPDATED) extends this enum but does
        not publish public payload schemas.
      enum:
        - REFERRAL_CREATED
        - REFERRAL_ACTIVATED
        - REFERRAL_APPLICATION_STATUS_CHANGED
        - TRANSFER_PROCESSED
        - TRANSFER_FAILED
        - EXPENSE_PAYMENT_UPDATED
        - USER_UPDATED
        - EMBEDDED_CARD_TRANSACTION_UPDATED
        - EMBEDDED_CARD_UPDATED
        - EMBEDDED_ACCOUNT_UPDATED
        - EMBEDDED_CARD_SHIPPING_UPDATED
        - EMBEDDED_DISPUTE_UPDATED
        - PARTNERSHIP_INTEGRATION_CONNECTION_UPDATED
        - EMBEDDED_CARD_AUTHORIZATION
        - EMBEDDED_FRAUD_ALERT
        - EMBEDDED_BILLING_GROUP_UPDATED
        - EMBEDDED_LEGAL_ENTITY_UPDATED
        - EMBEDDED_BILLING_STATEMENT_UPDATED
        - EMBEDDED_USER_STATUS_UPDATED
        - ACCOUNTING_RECORD_READY_FOR_EXPORT
    ApplicationStatus:
      type: string
      description: >
        Application status of a product.

        `NO_ACCOUNT` - There is no active application, and the product account
        is not provisioned.

        `ACTIVE` - The application is approved, and the product account is
        provisioned.

        `NOT_SUBMITTED` - The application is started but not yet submitted.

        `INFORMATION_PENDING` - The application is submitted and additional
        information is requested.

        `MANUAL_REVIEW` - The application is under manual review.

        `PROCESSING` - The application is submitted and is under review.

        `REJECTED` - The application is rejected.

        `CLOSED` - The product account is closed.
      enum:
        - NO_ACCOUNT
        - ACTIVE
        - NOT_SUBMITTED
        - INFORMATION_PENDING
        - MANUAL_REVIEW
        - PROCESSING
        - REJECTED
        - CLOSED
    ProductApplication:
      type: object
      description: The product application details for the referral.
      required:
        - cash
      properties:
        cash:
          $ref: '#/components/schemas/ApplicationStatus'
    ExpensePaymentStatus:
      type: string
      description: >-
        `PENDING`: The transaction is yet to be captured. It may be approved,
        yet to be approved, or yet to be declined.

        `DECLINED`: The transaction was declined.
      enum:
        - PENDING
        - DECLINED
    ExpensePaymentType:
      type: string
      description: >-
        `PURCHASE`: A pending transaction for making a purchase.

        `REFUND`: A pending transaction for a refund.

        `WITHDRAWAL`: A pending transaction for a withdrawal.

        `DECLINED`: A pending transaction that was declined and will not be
        completed.
      enum:
        - PURCHASE
        - REFUND
        - WITHDRAWAL
        - DECLINED
    PaymentType:
      type: string
      description: >-
        Only ACH, DOMESTIC_WIRE, CHEQUE, INTERNATIONAL_WIRE, BOOK_TRANSFER, and
        STABLECOIN details can be retrieved from the Payments API.
      enum:
        - ACH
        - DOMESTIC_WIRE
        - CHEQUE
        - INTERNATIONAL_WIRE
        - BOOK_TRANSFER
        - STABLECOIN
        - ACH_RETURN
        - WIRE_RETURN
        - CHEQUE_RETURN
    PaymentStatusReason:
      type: string
      description: The reason for the payment's status.
      enum:
        - OTHER
        - APPROVED
        - EXCEEDED_BUDGET_LIMIT
        - BUDGET_EXPIRED
        - NO_BUDGET
        - BUDGET_NOT_YET_STARTED
        - BUDGET_CATEGORY_RESTRICTION
        - BUDGET_MERCHANT_RESTRICTION
        - SUSPECTED_FRAUD
        - EXCEEDED_GLOBAL_LIMIT
        - EXCEEDED_USER_LIMIT
        - EXCEEDED_CARD_LIMIT
        - INVALID_EXPIRATION_DATE
        - CARD_NOT_ACTIVE
        - INVALID_CARD_CREDENTIALS
        - INVALID_BILLING_ADDRESS
        - CARD_SUSPENDED
        - CARD_TERMINATED
        - CARD_EXPIRED
        - MCC_BLOCKED
        - USER_SUSPENDED
        - INVALID_PIN
        - INVALID_CVV
        - EXCEEDED_PIN_ATTEMPTS
        - INSIDE_SANCTIONED_COUNTRY
        - SOFT_EXPIRATION
        - TRANSFERRED_CARD_NEW_MERCHANT
        - EXCEEDED_ANCESTOR_BUDGET_LIMIT
        - EXCEEDED_BUDGET_TRANSACTION_LIMIT
        - TOS_BLOCKED
        - COMPLIANCE_BLOCKED
    UserAttributes:
      type: string
      description: A user attribute that can change and trigger USER_UPDATED.
      enum:
        - STATUS
        - MANAGER_ID
        - DEPARTMENT_ID
        - LOCATION_ID
    Money:
      type: object
      description: >
        Money fields can be signed or unsigned. Fields are signed (an unsigned
        value will be interpreted as positive). The amount of money will be
        represented in the smallest denomination of the currency indicated. For
        example, USD 7.00 will be represented in cents with an amount of 700.
      required:
        - amount
      properties:
        amount:
          type: integer
          format: int64
          description: >-
            The amount of money, in the smallest denomination of the currency
            indicated by currency. For example, when currency is USD, amount is
            in cents.
          example: 700
        currency:
          type: string
          description: The type of currency, in ISO 4217 format.
          default: USD
          example: USD
    Merchant:
      type: object
      required:
        - country
        - mcc
        - raw_descriptor
      properties:
        raw_descriptor:
          type: string
          description: Merchant descriptor, it can be the merchant name.
        mcc:
          type: string
          description: >-
            A four-digit number listed in ISO 18245 for retail financial
            services, e.g. 4121 for Taxicabs and Rideshares.
        country:
          type: string
          description: Merchant's country, in ISO 3166-1 alpha-3 format.
    AccountingRecordReadyForExport:
      type: object
      description: A list of accounting records are ready for export.
      required:
        - accountingRecordIds
        - companyId
        - event_type
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: ACCOUNTING_RECORD_READY_FOR_EXPORT
        accountingRecordIds:
          type: array
          description: List of accounting record IDs ready for export.
          items:
            type: string
        companyId:
          type: string
          description: >-
            The `id` returned by the Get Company endpoint of the Team API. Use
            it to determine which access token to use when fetching details.
    ExpensePaymentUpdated:
      type: object
      description: >-
        Sent when an expense payment changes status. Subscription must be
        registered with a user with the CARD_ADMIN role.
      required:
        - card_id
        - company_id
        - event_type
        - expense_id
        - merchant
        - payment_description
        - payment_status
        - payment_status_reason
        - payment_type
        - version
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: EXPENSE_PAYMENT_UPDATED
        expense_id:
          type: string
          description: Unique ID associated with the expense.
        payment_status:
          $ref: '#/components/schemas/ExpensePaymentStatus'
        payment_type:
          $ref: '#/components/schemas/ExpensePaymentType'
        company_id:
          type: string
          description: >-
            The `id` returned by the Get Company endpoint of the Team API. Use
            it to determine which access token to use when fetching details.
        purchased_at:
          type: string
          format: date-time
          description: The time the purchase was made.
        amount:
          allOf:
            - $ref: '#/components/schemas/Money'
          description: Succeeded by the billing_amount field.
          deprecated: true
        original_amount:
          allOf:
            - $ref: '#/components/schemas/Money'
          description: >-
            The original amount of the expense is the amount that the employee
            submitted or incurred for reimbursements or card spends.
        billing_amount:
          allOf:
            - $ref: '#/components/schemas/Money'
          description: >-
            The billing amount of the expense is the amount that the entity is
            charged, on the entity's currency, for reimbursements or card
            spends.
        payment_description:
          type: string
          description: Succeeded by the merchant::raw_descriptor field.
          deprecated: true
        card_id:
          type: string
          description: The ID of the card that is associated with the expense.
        merchant:
          allOf:
            - $ref: '#/components/schemas/Merchant'
          description: The merchant associated with the expense.
        payment_status_reason:
          $ref: '#/components/schemas/PaymentStatusReason'
        payment_authorization_code:
          type: string
          description: The authorization code of the associated card expense.
        version:
          type: integer
          format: int32
          minimum: 1
          description: >-
            Version of this expense. This value starts at 1 and is incremented
            by 1 with every update.
          example: 1
    ReferralActivated:
      type: object
      description: Sent when a user signs up with the referral link.
      required:
        - event_type
        - referral_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: REFERRAL_ACTIVATED
        referral_id:
          type: string
          description: The referral ID.
    ReferralApplicationStatusChanged:
      type: object
      description: Sent when the application status is changed for a referral.
      required:
        - application
        - event_type
        - referral_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: REFERRAL_APPLICATION_STATUS_CHANGED
        referral_id:
          type: string
          description: The referral ID.
        application:
          $ref: '#/components/schemas/ProductApplication'
    ReferralCreated:
      type: object
      description: Sent when a referral is created.
      required:
        - event_type
        - referral_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: REFERRAL_CREATED
        referral_id:
          type: string
          description: The referral ID.
    TransferFailed:
      type: object
      description: Sent when a transfer failed.
      required:
        - company_id
        - event_type
        - payment_type
        - transfer_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: TRANSFER_FAILED
        transfer_id:
          type: string
          description: The transfer ID.
        payment_type:
          $ref: '#/components/schemas/PaymentType'
        return_for_id:
          type: string
          description: >-
            The original transaction ID that is returned when the payment type
            is ACH_RETURN, WIRE_RETURN, or CHEQUE_RETURN.
        company_id:
          type: string
          description: >-
            The `id` returned by the Get Company endpoint of the Team API. Use
            it to determine which access token to use when fetching details.
    TransferProcessed:
      type: object
      description: Sent when a transfer is processed.
      required:
        - company_id
        - event_type
        - payment_type
        - transfer_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: TRANSFER_PROCESSED
        transfer_id:
          type: string
          description: The transfer ID.
        payment_type:
          $ref: '#/components/schemas/PaymentType'
        return_for_id:
          type: string
          description: >-
            The original transaction ID that is returned when the payment type
            is ACH_RETURN, WIRE_RETURN, or CHEQUE_RETURN.
        company_id:
          type: string
          description: >-
            The `id` returned by the Get Company endpoint of the Team API. Use
            it to determine which access token to use when fetching details.
    UserUpdated:
      type: object
      description: Sent when a user is updated.
      required:
        - company_id
        - event_type
        - updated_attributes
        - user_id
      properties:
        event_type:
          allOf:
            - $ref: '#/components/schemas/WebhookEventType'
          example: USER_UPDATED
        user_id:
          type: string
          description: The ID of the user that was updated.
        company_id:
          type: string
          description: >-
            The `id` returned by the Get Company endpoint of the Team API. Use
            it to determine which access token to use when fetching details.
        updated_attributes:
          type: array
          description: The set of user attributes that changed in this update.
          items:
            $ref: '#/components/schemas/UserAttributes'