Signicat · OpenAPI Overlay 1.0.0

API Evangelist overlay for Signicat Usage Api

2 actions 2 updates documentation extends ../openapi/_original/signicat-usage-openapi.yml
Derived by API Evangelist Built from the contracts Signicat publishes. Signicat did not publish this file.
View Overlay File View on GitHub Overlay Specification

What the actions change

externalDocsoperationIdx-apievangelist-derived-operationId

Targets 2

$
$.paths['/usage/transactions'].get

OpenAPI Overlay

Raw ↑ 
overlay: 1.0.0
info:
  title: API Evangelist overlay for Signicat Usage Api
  version: 1.0.0
extends: ../openapi/_original/signicat-usage-openapi.yml
x-generated: '2026-10-18'
x-method: generated
x-source: openapi/signicat-usage-openapi.yml
actions:
- target: $
  description: Link the provider API reference page (listed in https://developer.signicat.com/llms-apis.txt).
  update:
    externalDocs:
      description: Signicat API reference
      url: https://developer.signicat.com/apis/usage/
- target: $.paths['/usage/transactions'].get
  description: Derived operationId (operation ships without one); x-apievangelist-derived marks it as ours.
  update:
    operationId: getUsageTransactions
    x-apievangelist-derived-operationId: true

Work with this as data

Every overlay here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for openapi overlays

4 MCP tools reach this
  • find_overlaysBrowse and filter every overlay in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This overlay 
curl "https://apis.io/api/v1/overlays/signicat-usage-overlay"
All openapi overlays 
curl "https://apis.io/api/v1/overlays?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.