OpenAPI Specification
openapi: 3.1.0
info:
title: Method Account Attributes Payment Reversals API
version: '2025-12-01'
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 `2025-12-01`.\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 `2025-12-01`. 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
- url: https://sandbox.methodfi.com
description: Sandbox
- url: https://dev.methodfi.com
description: Development
security:
- SecretKey: []
tags:
- name: Payment Reversals
description: Reversals for payments
paths:
/payments/{paymentId}/reversals:
get:
operationId: listPaymentReversals
summary: List all reversals for a payment
description: Returns a list of all reversals associated with a specific payment.
tags:
- Payment Reversals
security:
- SecretKey: []
parameters:
- $ref: '#/components/parameters/method_version'
- $ref: '#/components/parameters/PaymentIdParam'
responses:
'200':
description: A list of payment reversals.
content:
application/json:
schema:
$ref: '#/components/schemas/PaymentReversalListResponse'
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
'500':
$ref: '#/components/responses/InternalError'
/payments/{paymentId}/reversals/{reversalId}:
get:
operationId: retrievePaymentReversal
summary: Retrieve a payment reversal
description: Retrieves a specific reversal for a payment by its unique identifier.
tags:
- Payment Reversals
security:
- SecretKey: []
parameters:
- $ref: '#/components/parameters/method_version'
- $ref: '#/components/parameters/PaymentIdParam'
- $ref: '#/components/parameters/ReversalIdParam'
responses:
'200':
description: The requested payment reversal.
content:
application/json:
schema:
$ref: '#/components/schemas/PaymentReversalResponse'
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
'500':
$ref: '#/components/responses/InternalError'
put:
operationId: updatePaymentReversal
summary: Update a payment reversal
description: Updates a payment reversal. Currently supports updating the reversal status.
tags:
- Payment Reversals
security:
- SecretKey: []
parameters:
- $ref: '#/components/parameters/method_version'
- $ref: '#/components/parameters/idempotency_key'
- $ref: '#/components/parameters/PaymentIdParam'
- $ref: '#/components/parameters/ReversalIdParam'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/PaymentReversalUpdateRequest'
responses:
'200':
description: The updated payment reversal.
content:
application/json:
schema:
$ref: '#/components/schemas/PaymentReversalResponse'
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
'422':
$ref: '#/components/responses/UnprocessableEntity'
'429':
$ref: '#/components/responses/RateLimited'
'500':
$ref: '#/components/responses/InternalError'
components:
schemas:
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.
PaymentReversalUpdateRequest:
type: object
description: Request body for updating a payment reversal.
properties:
status:
type: string
description: Updated status for the reversal.
PaymentReversalResourceError:
type:
- object
- 'null'
description: Error details when a payment reversal fails.
required:
- type
- code
- sub_type
- message
properties:
type:
type: string
description: The category of reversal error.
enum:
- PAYMENT_REVERSAL_FAILED
code:
type: integer
description: Numeric error code (14XXX range).
enum:
- 14001
- 14002
- 14003
sub_type:
type: string
description: Specific reversal error classification.
enum:
- PAYMENT_REVERSAL_INSUFFICIENT_FUNDS
- PAYMENT_REVERSAL_UNAUTHORIZED
- PAYMENT_REVERSAL_INVALID_ACCOUNT
message:
type: string
description: Human-readable error description.
example:
type: PAYMENT_REVERSAL_FAILED
code: 14001
sub_type: PAYMENT_REVERSAL_INSUFFICIENT_FUNDS
message: Payment reversal failed due to insufficient funds from the account.
PaymentReversalResponse:
allOf:
- $ref: '#/components/schemas/SuccessEnvelope'
- type: object
properties:
data:
$ref: '#/components/schemas/PaymentReversal'
PaymentReversal:
type: object
description: A reversal for a payment, representing a return of funds.
required:
- id
- pmt_id
- status
- direction
- trace_id
- target_account
- amount
- description
- fee
- created_at
- updated_at
properties:
id:
type: string
description: Unique identifier for the reversal.
pattern: ^rvs_\w+$
example: rvs_dKe9ehC3hEBYy
pmt_id:
type: string
description: Identifier of the payment being reversed.
pattern: ^pmt_\w+$
status:
type: string
description: Current status of the reversal.
enum:
- pending_approval
- pending
- processing
- failed
- sent
- pending_settlement
direction:
type: string
description: Direction of the reversal relative to the original payment.
enum:
- credit
- debit
trace_id:
type:
- string
- 'null'
description: Trace identifier for the reversal.
target_account:
type:
- string
- 'null'
description: The target account for the reversal.
amount:
type: integer
description: Reversal amount in cents.
minimum: 0
description:
type:
- string
- 'null'
description: Human-readable description for the reversal.
fee:
type:
- object
- 'null'
description: Fee information for the reversal.
error:
$ref: '#/components/schemas/PaymentReversalResourceError'
created_at:
type: string
format: date-time
description: Timestamp when the reversal was created.
updated_at:
type: string
format: date-time
description: Timestamp when the reversal was last updated.
PaymentReversalListResponse:
allOf:
- $ref: '#/components/schemas/ListEnvelope'
- type: object
properties:
data:
type: array
items:
$ref: '#/components/schemas/PaymentReversal'
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
ListEnvelope:
type: object
description: Standard envelope for successful responses that return a list payload.
required:
- success
- data
- message
properties:
success:
type: boolean
description: Always `true` for successful responses.
data:
description: Operation-specific list payload.
message:
type:
- string
- 'null'
example:
success: true
data: []
message: null
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:
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'
NotFound:
description: Not found - the requested resource does not exist.
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'
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'
BadRequest:
description: Bad request - invalid parameters or request body.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorEnvelope'
parameters:
method_version:
name: Method-Version
in: header
required: true
description: 'API version to use for this request. This spec targets `2025-12-01`.
The SDK sets this header automatically.
'
schema:
type: string
enum:
- '2025-12-01'
default: '2025-12-01'
idempotency_key:
name: Idempotency-Key
in: header
required: false
description: 'Idempotency key for safely retrying a write request. Reuse the same value when
retrying the same logical operation to avoid creating duplicate side effects.
'
schema:
type: string
format: uuid
ReversalIdParam:
name: reversalId
in: path
required: true
description: Unique identifier for the reversal.
schema:
type: string
pattern: ^rvs_\w+$
PaymentIdParam:
name: paymentId
in: path
required: true
description: Unique identifier for the payment.
schema:
type: string
pattern: ^pmt_\w+$
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.
'