Alpaca · OpenAPI Overlay 1.0.0

API Evangelist enhancements for the Alpaca Trading API

3 actions 3 updates update extends openapi/alpaca-trading-api-openapi.yml

Generated by API Evangelist Written by API Evangelist tooling for Alpaca's API. It is a proposal applied on top of the contract, not a document Alpaca publishes.

View Overlay File View on GitHub Overlay Specification

What the actions change

x-apievangelistx-sandboxx-idempotency

Targets 1

$.info

OpenAPI Overlay

overlay: 1.0.0
info:
  title: API Evangelist enhancements for the Alpaca Trading API
  version: 1.0.0
extends: openapi/alpaca-trading-api-openapi.yml
x-provenance:
  generated: '2026-07-22'
  method: generated
  note: >-
    Non-destructive overlay capturing API Evangelist enrichment context for the harvested spec;
    the original OpenAPI is never mutated.
actions:
  - target: $.info
    update:
      x-apievangelist:
        provider: alpaca
        artifacts:
          authentication: authentication/alpaca-authentication.yml
          conventions: conventions/alpaca-conventions.yml
          errors: errors/alpaca-problem-types.yml
          sandbox: sandbox/alpaca-sandbox.yml
          rate-limits: rate-limits/alpaca-rate-limits.yml
          lifecycle: lifecycle/alpaca-lifecycle.yml
          mcp: mcp/alpaca-mcp.yml
          tool-crosswalk: mcp/alpaca-tool-crosswalk.yml
  - target: $.info
    update:
      x-sandbox:
        baseURL: https://paper-api.alpaca.markets
        note: Paper trading environment; same API spec, separate API keys.
  - target: $.info
    update:
      x-idempotency:
        mechanism: client_order_id
        note: Duplicate submissions with the same client_order_id are rejected.