Buttondown · OpenAPI Overlay 1.0.0

API Evangelist enhancements for Buttondown Books API

3 actions 3 updates update extends openapi/buttondown-books-api-openapi.yml

Derived by API Evangelist Built from the contracts Buttondown publishes. Buttondown did not publish this file.

View Overlay File View on GitHub Overlay Specification

What the actions change

x-apievangelist-providerx-apievangelist-sourcex-apievangelist-harvestedx-apievangelist-conventionsx-apievangelist-errorsx-apievangelist-rate-limitsx-apievangelist-authenticationx-buttondown-idempotency-header

Targets 3

$.info

$.servers

$.paths.*.*

OpenAPI Overlay

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Buttondown Books API
  version: 1.0.0
extends: openapi/buttondown-books-api-openapi.yml
x-generated: '2026-08-13'
x-method: generated
x-source: openapi/_original/buttondown-openapi.json
actions:
- target: $.info
  update:
    x-apievangelist-provider: buttondown
    x-apievangelist-source: https://api.buttondown.com/v1/openapi.json
    x-apievangelist-harvested: '2026-08-13'
    x-apievangelist-conventions: conventions/buttondown-conventions.yml
    x-apievangelist-errors: errors/buttondown-error-codes.yml
    x-apievangelist-rate-limits: rate-limits/buttondown-rate-limits.yml
    x-apievangelist-authentication: authentication/buttondown-authentication.yml
- target: $.servers
  update:
  - url: https://api.buttondown.com/v1
    description: Production
- target: $.paths.*.*
  update:
    x-buttondown-idempotency-header: X-Idempotency-Key
    x-buttondown-api-version-header: X-API-Version
    x-buttondown-rate-limit-headers:
    - X-RateLimit-Limit
    - X-RateLimit-Remaining
    - X-RateLimit-Reset

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/buttondown-books-overlay"

All openapi overlays

curl "https://apis.io/api/v1/overlays?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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.