OpenAPI 3.1 document

Every endpoint of the API is described in one OpenAPI 3.1 document at https://anytime-capital.com/api/v1/openapi.json: its parameters, request bodies, responses, errors, the API key permission it needs and whether it takes an Idempotency-Key. It is public (no key), served with Access-Control-Allow-Origin: *, and built from the same tables as this reference, so the two always agree.

Tags

Use it

• Typed TypeScript: npx openapi-typescript https://anytime-capital.com/api/v1/openapi.json -o anytime-capital.d.ts gives you the request and response types to use with fetch.
• API clients: import the URL into Postman, Insomnia or Bruno to get every request ready to send; set the bearer token to your key. Or import the ready-made Postman collection, with example bodies and your key as a variable.
• Other languages: any generator that reads OpenAPI 3.1 can build a client from it. Check the generated code sends Idempotency-Key on writes.
• AI tools: give an assistant the URL alongside llms-full.txt so it writes calls against the real schemas. See the AI agents hub.

Endpoint

curl https://anytime-capital.com/api/v1/openapi.json

const res = await fetch("https://anytime-capital.com/api/v1/openapi.json");
const spec = await res.json();

import requests

res = requests.get(
    "https://anytime-capital.com/api/v1/openapi.json",
    timeout=30,
)
spec = res.json()

{
  "openapi": "3.1.0",
  "info": {
    "title": "Anytime Capital Payments API",
    "version": "2026-10-24",
    "…": "…"
  },
  "servers": [
    {
      "url": "https://anytime-capital.com/api/v1",
      "description": "Production"
    }
  ],
  "paths": {
    "/payments": {
      "get": {
        "operationId": "listPayments",
        "x-anytime-permission": "payments:read",
        "…": "…"
      }
    },
    "…": "…"
  },
  "components": {
    "…": "…"
  }
}