Method Financial Forwarding Requests API

openapi: 3.2.0
info:
  title: Method Forwarding Requests API
  version: '2026-03-30'
  license:
    name: Proprietary
    url: https://methodfi.com
  description: "The Method API enables you to retrieve financial data, create payments, and manage\nentities and accounts programmatically. This specification covers the public API\nsurface for version `2026-03-30`.\n\n## Authentication\n\nMost API requests require a Bearer token in the `Authorization` header.\nUse your secret key (`sk_...`) for server-side requests and public key (`pk_...`)\nfor client-side Element requests. Public Message-Level Encryption key discovery\nendpoints are documented separately and do not require authentication.\n\n## Versioning\n\nThe API version is selected via the `Method-Version` header. This spec targets\nversion `2026-03-30`. The SDK sets this header automatically.\n\n## Response Envelope\n\nMost JSON responses are wrapped in a standard envelope:\n\n```json\n{\n  \"success\": true,\n  \"data\": { ... },\n  \"message\": null\n}\n```\n\nThe `/.well-known/jwks.json` endpoint is an exception and returns a bare JWK set.\n\n## Pagination\n\nList endpoints return pagination metadata in response headers:\n`Pagination-Page`, `Pagination-Page-Count`, `Pagination-Page-Limit`,\n`Pagination-Total-Count`, `Pagination-Page-Cursor-Prev`, `Pagination-Page-Cursor-Next`.\n\n## Expandable Fields\n\nCertain resource fields can be expanded from IDs to full objects using the\n`expand` query parameter. Maximum nesting depth is 4 levels.\n"
  contact:
    name: Method Financial
    url: https://methodfi.com
    email: team@methodfi.com
servers:
- url: https://production.methodfi.com
  description: Production
  x-fern-server-name: Production
- url: https://sandbox.methodfi.com
  description: Sandbox
  x-fern-server-name: Sandbox
- url: https://dev.methodfi.com
  description: Development
  x-fern-server-name: Development
security:
- SecretKey: []
tags:
- name: Forwarding Requests
  description: Request forwarding with sensitive data injection
paths:
  /forwarding_requests:
    post:
      operationId: createForwardingRequest
      summary: Create a forwarding request
      description: 'Creates a new forwarding request that proxies an HTTP request to a third-party endpoint with sensitive data injection.


        Forwarding-specific validation and execution failures are returned in the standard error envelope.

        Common forwarding `sub_type` values include `URL_NOT_ALLOWED`, `INVALID_METHOD`,

        `BODY_JSON_INVALID`, `BINDING_NOT_FOUND`, `FORWARDED_REQUEST_NETWORK_ERROR`,

        and `FORWARDED_REQUEST_TIMEOUT`.

        '
      tags:
      - Forwarding Requests
      security:
      - SecretKey: []
      parameters:
      - $ref: '#/components/parameters/method_version'
      - $ref: '#/components/parameters/idempotency_key'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ForwardingRequestCreateRequest'
      responses:
        '200':
          description: The created forwarding request with response data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ForwardingRequestResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '422':
          $ref: '#/components/responses/UnprocessableEntity'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/InternalError'
        '504':
          $ref: '#/components/responses/GatewayTimeout'
  /forwarding_requests/{id}:
    get:
      operationId: retrieveForwardingRequest
      summary: Retrieve a forwarding request
      description: Returns a single forwarding request by its identifier.
      tags:
      - Forwarding Requests
      security:
      - SecretKey: []
      parameters:
      - $ref: '#/components/parameters/method_version'
      - name: id
        in: path
        required: true
        description: Unique identifier for the forwarding request.
        schema:
          type: string
          pattern: ^freq_\w+$
      responses:
        '200':
          description: The requested forwarding request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ForwardingRequestResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/InternalError'
components:
  parameters:
    idempotency_key:
      name: Idempotency-Key
      in: header
      required: false
      description: 'Idempotency key for safely retrying a write request. Reuse the same value when

        retrying the same logical operation to avoid creating duplicate side effects.

        '
      schema:
        type: string
        format: uuid
    method_version:
      name: Method-Version
      in: header
      required: true
      description: 'API version to use for this request. This spec targets `2026-03-30`.

        The SDK sets this header automatically.

        '
      schema:
        type: string
        enum:
        - '2026-03-30'
        default: '2026-03-30'
  schemas:
    StatusHistoryItem:
      type: object
      properties:
        status:
          type: string
        timestamp:
          type: string
          format: date-time
    JsonValue:
      description: Arbitrary JSON value.
      oneOf:
      - type: string
      - type: number
      - type: boolean
      - type: 'null'
      - type: object
        additionalProperties: true
      - type: array
        items: {}
    ForwardingResponseDetail:
      type: object
      description: Details of the upstream response captured for the forwarding request.
      properties:
        status_code:
          type:
          - integer
          - 'null'
          description: HTTP status code returned by the destination.
        headers:
          type: object
          additionalProperties:
            type: string
          description: HTTP headers returned by the destination.
        body:
          $ref: '#/components/schemas/JsonValue'
          description: Body returned by the destination.
    ForwardingRequest:
      type: object
      required:
      - id
      - bindings
      - request
      - response
      - duration_ms
      - status
      - status_history
      - created_at
      properties:
        id:
          type: string
          description: Unique identifier for the forwarding request.
          example: freq_yVf3mkzbhz9tj
        bindings:
          type: object
          additionalProperties:
            type: string
          description: Key-value map of secret bindings used in the request.
        request:
          $ref: '#/components/schemas/ForwardingRequestDetail'
        response:
          $ref: '#/components/schemas/ForwardingResponseDetail'
        duration_ms:
          type: number
          description: Total duration of the forwarded request in milliseconds.
        status:
          $ref: '#/components/schemas/ForwardingRequestStatus'
        status_history:
          type: array
          items:
            $ref: '#/components/schemas/StatusHistoryItem'
          description: History of status transitions.
        created_at:
          type: string
          format: date-time
          description: Timestamp when the forwarding request was created.
    ForwardingRequestDetail:
      type: object
      required:
      - url
      - method
      - headers
      - body
      properties:
        url:
          type: string
          description: The destination URL for the forwarded request.
        method:
          type: string
          enum:
          - GET
          - POST
          - PUT
          - PATCH
          - DELETE
          description: HTTP method of the forwarded request.
        headers:
          type: object
          additionalProperties:
            type: string
          description: HTTP headers sent with the forwarded request.
        body:
          type: string
          description: Body of the forwarded request.
    ForwardingRequestCreateRequest:
      type: object
      required:
      - url
      - method
      - bindings
      - headers
      - body
      properties:
        url:
          type: string
          description: The destination URL for the forwarded request.
        method:
          type: string
          enum:
          - GET
          - POST
          - PUT
          - PATCH
          - DELETE
          description: HTTP method to use.
        headers:
          type: object
          additionalProperties:
            type: string
          description: HTTP headers to include in the forwarded request.
        body:
          type: string
          description: Body to send with the forwarded request.
        bindings:
          type: object
          additionalProperties:
            type: string
          description: Key-value map of secret bindings to inject into the request.
        metadata:
          type:
          - object
          - 'null'
          description: Optional metadata to attach to the forwarding request.
    ForwardingRequestResponse:
      allOf:
      - $ref: '#/components/schemas/SuccessEnvelope'
      - type: object
        properties:
          data:
            $ref: '#/components/schemas/ForwardingRequest'
    ErrorEnvelope:
      type: object
      required:
      - success
      - data
      - message
      properties:
        success:
          type: boolean
          description: Always `false` for error responses.
        data:
          type: object
          required:
          - error
          properties:
            error:
              $ref: '#/components/schemas/ErrorObject'
        message:
          type: string
    ErrorObject:
      type: object
      required:
      - type
      - code
      - message
      properties:
        type:
          type: string
          description: Error type category.
          enum:
          - invalid_request
          - api_error
          - resource_error
        code:
          type: integer
          description: Numeric error code. Common codes include 400 (bad request), 401 (unauthorized), 403 (forbidden), 404 (not found), 422 (unprocessable entity), 429 (rate limited), and 500 (internal error).
        sub_type:
          type:
          - string
          - 'null'
          description: More specific error classification.
        message:
          type: string
          description: Human-readable error description.
    ForwardingRequestStatus:
      type: string
      enum:
      - completed
      - failed
    SuccessEnvelope:
      type: object
      description: Standard envelope for successful responses that return a single payload.
      required:
      - success
      - data
      - message
      properties:
        success:
          type: boolean
          description: Always `true` for successful responses.
        data:
          description: Operation-specific response payload.
        message:
          type:
          - string
          - 'null'
      example:
        success: true
        data: {}
        message: null
  responses:
    Unauthorized:
      description: Unauthorized - missing or invalid authentication token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    InternalError:
      description: Internal server error.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    Forbidden:
      description: Forbidden - insufficient permissions for this operation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    RateLimited:
      description: Too many requests - rate limit exceeded.
      headers:
        Retry-After:
          description: Number of seconds to wait before retrying.
          schema:
            type: integer
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    BadRequest:
      description: Bad request - invalid parameters or request body.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    NotFound:
      description: Not found - the requested resource does not exist.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    GatewayTimeout:
      description: Upstream timeout - the request could not be completed before the upstream deadline.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
    UnprocessableEntity:
      description: Unprocessable entity - the request was valid JSON but failed business or validation rules.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
  securitySchemes:
    OpalToken:
      type: http
      scheme: bearer
      description: 'Opal token authentication for Opal session endpoints. Use an Opal token (`otkn_...`)

        as the Bearer token. Created via POST /opal/token using a secret key.

        '
    SecretKey:
      type: http
      scheme: bearer
      description: 'Secret key authentication. Use your team''s secret key (`sk_...`) as the Bearer token.

        All authenticated API endpoints require this scheme unless otherwise noted.

        '