# spec0 public API registry

> Public OpenAPI specifications with version history and a machine-generated changelog for each one. Every listing names the API's real owner and links its official source.

spec0 re-reads each mirrored specification on a schedule and diffs it against the version before it, so a listing says not only what an API looks like now but what moved, when, and whether it may break code that already calls it. Everything below is free to read and needs no account.

Each API has an overview page at the link below, a changelog at `<link>/changelog`, and a short markdown abstract at `<link>.md`.

## Adyen

- [Transfer webhooks — Adyen](https://app.spec0.io/registry/adyen/transfer-webhooks): Adyen sends webhooks to inform your system about incoming and outgoing transfers in your platform.
- [Adyen Checkout API v72 — Adyen](https://app.spec0.io/registry/adyen/checkout-api): Adyen's online-payments API — sessions, payments, modifications.

## Amazon

- [Amazon Selling Partner API — Orders — Amazon](https://app.spec0.io/registry/amazon/selling-partner-orders): Order retrieval and management for Amazon sellers.

## Amida Technology Solutions

- [Recruitment Registry — Amida Technology Solutions](https://app.spec0.io/registry/amida-tech/recruitment-registry): Survey Based Match of Participants to Clinical Trials

## Ansible

- [AAP on Azure - Deployment Driver API — Ansible](https://app.spec0.io/registry/ansible/aap-on-azure-deployment-driver-api): Mirrored from Ansible's official OpenAPI specification.

## Apideck Libraries

- [HRIS API — Apideck Libraries](https://app.spec0.io/registry/apideck-libraries/hris-api): Welcome to the HRIS API.

## Arista Networks

- [arista.softwaremanagement.v1 Resources — Arista Networks](https://app.spec0.io/registry/aristanetworks/arista-softwaremanagement-v1): A successful response.

## bunq

- [bunq API — bunq](https://app.spec0.io/registry/bunq/api): ***UPDATE:*** *We have released a beta version of the new bunq API documentation.* ***NOTICE:*** *We have updated the sandbox base url to…

## Coinbase

- [Rosetta — Coinbase](https://app.spec0.io/registry/coinbase/rosetta): Build Once. Integrate Your Blockchain Everywhere.

## Discord

- [Discord HTTP API — Discord](https://app.spec0.io/registry/discord/http-api): Channels, guilds, messages, and interactions.

## Docusign Inc.

- [Docusign eSignature REST API — Docusign Inc.](https://app.spec0.io/registry/docusign/esignature-rest-api): The Docusign eSignature REST API provides you with a powerful, convenient, and simple Web services API for interacting with Docusign.

## BuildingPro Suites

- [Zevvy app API — BuildingPro Suites](https://app.spec0.io/registry/eliona-smart-building-assistant/zevvy-app-api): API to access and configure the Zevvy app

## Fire Financial Services

- [Fire Financial Services Business API — Fire Financial Services](https://app.spec0.io/registry/firefinancialservices/fire-financial-services-business-api): The fire.com API allows you to deeply integrate Business Account features

## Flickr

- [Flickr API Schema — Flickr](https://app.spec0.io/registry/flickr/api): A subset of Flickr's API defined in Swagger format.

## Google

- [Google Maps Platform APIs — Google](https://app.spec0.io/registry/google/maps-platform): Directions, distance matrix, geocoding, places, and more.

## Hivelocity

- [Hivelocity API for Partners — Hivelocity](https://app.spec0.io/registry/hivelocity/api-for-partners): You have not been granted permission to complete this action.

## Intercom

- [Intercom API v2.16 — Intercom](https://app.spec0.io/registry/intercom/api): Contacts, conversations, tickets, and messaging.

## TFDi Design

- [smartCARS 3 Public API — TFDi Design](https://app.spec0.io/registry/invernyx/smartcars-3-public-api): Get the current API version

## Testkube

- [kusk-gateway-api — Testkube](https://app.spec0.io/registry/kubeshop/kusk-gateway-api): This is the Kusk Gateway Management API

## LandingAI

- [AIDE Gateway — LandingAI](https://app.spec0.io/registry/landing-ai/aide-gateway): AIDE Gateway — proxy surface + Temporal job surface.

## LangChain

- [Agent Protocol — LangChain](https://app.spec0.io/registry/langchain-ai/agent-protocol): A run is an invocation of an agent, optionally, on a thread.

## Light Protocol

- [photon-indexer — Light Protocol](https://app.spec0.io/registry/lightprotocol/photon-indexer): Solana indexer for general compression

## Mailgun

- [Mailgun API — Mailgun](https://app.spec0.io/registry/mailgun/api): Email sending, domains, routes, and validation.

## Meetic

- [Blackbeard API — Meetic](https://app.spec0.io/registry/meetic/blackbeard-api): A REST API served from Blackbeard.

## Mermaid

- [Mermaid Chart — Mermaid](https://app.spec0.io/registry/mermaid-chart/api): These are the subset of MermaidChart APIs that's required to create plugins to display diagrams for users.

## Netlify

- [Netlify's API documentation — Netlify](https://app.spec0.io/registry/netlify/api): Netlify is a hosting service for the programmable web.

## Okta

- [Okta Admin Management API — Okta](https://app.spec0.io/registry/okta/management-api): Users, groups, apps, and policies for Okta orgs.

## PayPal

- [PayPal Orders API v2 — PayPal](https://app.spec0.io/registry/paypal/orders-api): Create, update, and capture orders — PayPal's flagship checkout surface.

## PocketSmith

- [PocketSmith](https://app.spec0.io/registry/pocketsmith/api): If you want to build a tool just for yourself, be it a desktop widget to display your balances or a tool to import transactions from a bank without a bank…

## SendGrid

- [Twilio SendGrid v3 Mail API — SendGrid (Twilio)](https://app.spec0.io/registry/sendgrid/mail-api): Transactional email sending (Mail Send v3).

## sms77io

- [seven — sms77io](https://app.spec0.io/registry/sms77io/seven): seven.io offers you the possibility to send SMS, RCS, text-to-speech messages, perform home register lookups, mobile number portability status lookups, phone…

## spec0-posthog

- [spec0-platform — spec0-posthog](https://app.spec0.io/registry/spec0-posthog/spec0-platform)

## SpecStory

- [SpecStory Cloud API — SpecStory](https://app.spec0.io/registry/specstoryai/specstory-cloud-api): ## **Overview** SpecStory Cloud provides a REST API for core CRUD operations for projects and AI chat sessions, and a GraphQL API for querying.

## Square

- [Square Connect API — Square (Block)](https://app.spec0.io/registry/square/connect-api): The full Square commerce surface — payments, orders, catalog, customers — in one bundled specification.

## Stripe

- [Stripe API — Stripe](https://app.spec0.io/registry/stripe/api): Payments infrastructure — charges, customers, subscriptions, invoicing.

## tempora

- [openweather-spec — tempora](https://app.spec0.io/registry/tempora/openweather-spec)

## Ticketmaster Tech

- [Discovery API — Ticketmaster Tech](https://app.spec0.io/registry/ticketmaster-api/discovery-api): The Ticketmaster Discovery API allows you to search for events, attractions, or venues.

## Twilio

- [Twilio - Voice — Twilio](https://app.spec0.io/registry/twilio/voice): The absolute URL of the resource.
- [Twilio API (v2010) — Twilio](https://app.spec0.io/registry/twilio/api): Twilio's core REST API — messaging, voice, accounts.

## Tyk Technologies

- [Gateway REST API — Tyk Technologies](https://app.spec0.io/registry/tyktechnologies/gateway-rest-api): Mirrored from Tyk Technologies's official OpenAPI specification.

## Up

- [Up API — Up](https://app.spec0.io/registry/up-banking/up-api): The Up API gives you programmatic access to your balances and transaction data.

## UPS

- [UPS Shipping API — UPS](https://app.spec0.io/registry/ups/shipping-api): Create and manage shipments on the UPS network.

## Velo Payments Open API

- [Velo Payments APIs — Velo Payments Open API](https://app.spec0.io/registry/velopaymentsapi/velo-payments-apis): ## Terms and Definitions

## Xero Developer API

- [Xero Assets API — Xero Developer API](https://app.spec0.io/registry/xeroapi/xero-assets-api): The Assets API exposes fixed asset related functions of the Xero Accounting application and can be used for a variety of purposes such as creating assets…

## Optional

- [Registry directory](https://app.spec0.io/registry): the same listings, browsable, with search and filters.
- [Sitemap](https://app.spec0.io/sitemap.xml): every registry URL with its last-modified date.