generated: '2026-07-20'
method: searched
source:
  - https://github.com/merit-systems/sdk/blob/master/api.md
  - https://agentcash.dev/openapi.json
authentication:
  style: >-
    Merit Systems API uses a static x-api-key header. AgentCash uses wallet auth:
    SIWX signed header for free endpoints, x402/MPP micropayments for paid ones.
  see: authentication/merit-systems-authentication.yml
versioning:
  scheme: uri-path
  current: v1
  example: https://api.merit.systems/v1
pagination:
  style: page-number
  request_params:
    page: Page number (default 1)
    page_size: Results per page (default 50, max 100)
  response_fields:
    items: Array of results
    page: Current page number
    page_size: Page size
    total_count: Total number of records
    has_next: Whether another page exists
  filters:
    group_id: Filter payments by group ID (UUID)
request_tracing:
  field: request_id
  location: error response body
  description: Errors include an optional request_id for support and correlation.
error_envelope:
  shape: '{ status: number, message: string, request_id?: string }'
  format: json
  see: errors/merit-systems-problem-types.yml
  sdk_error_types: [UnauthorizedError, NotFoundError, BadRequestError, InternalServerError, MeritError]
payments:
  protocols: [x402, mpp]
  status_code: 402
  currency: USDC
  networks: [base, solana, tempo]
  description: >-
    AgentCash paid endpoints follow the x402 flow — the server responds 402
    Payment Required and the client's wallet settles payment in-band. Pricing
    can be dynamic (per-call), advertised via x-payment-info on the operation.
idempotency:
  supported: false
  note: No idempotency-key header is documented for the Merit or AgentCash REST APIs.
rate_limiting:
  documented: false