API Tools

Mock Service Worker library that intercepts requests in browser and Node tests.

Open-source generator of API clients, servers and docs from OpenAPI documents.

Cloud-scale load testing for HTTP, WebSocket, Socket.io and serverless.

Swagger

Development

OpenAPI tooling for designing, documenting and testing HTTP APIs.

Open-source web components for rendering beautiful, interactive OpenAPI docs.

Kong Insomnia docs and designer workflows for REST, GraphQL and gRPC collections.

Red Hat API management for rate limits, analytics, developer portals and monetisation.

API marketplace and hub for discovering, testing and managing third-party APIs.

Fake REST API from a JSON file, useful for prototypes and front-end development.

Property-based API testing that generates cases from OpenAPI and GraphQL schemas.

public-apis by public-apis — api · apis · dataset — Python source project.

Marzban by Gozargah — api · censorship resistant · dashboard — Python source project.

apitable by apitable — admin dashboard · airtable · airtable alternative — TypeScript source project.

Desktop API client for REST, GraphQL, gRPC and WebSockets with local-first data.

Sanity

API Tools

Composable content platform with a real-time API, GROQ queries and Studio.

SDK generator that produces idiomatic client libraries from an OpenAPI spec.

Standalone web server that turns a PostgreSQL database directly into a REST API.

Insomnia

Development

Kong’s API client for REST, GraphQL and gRPC with a plugin ecosystem.

Google Cloud API management for proxies, developer portals, analytics and monetisation.

HTTPie

Development

Human-friendly HTTP client with a terminal CLI, desktop app and cloud workspaces.

Programmable API gateway with TypeScript policies, developer portal and rate limits.

The Guild GraphQL server that is schema-agnostic, embeddable and spec compliant.

ReadMe

API Tools

Developer hubs for API reference, guides, changelogs and interactive try-it consoles.

Hasura

Databases

Instant GraphQL and REST APIs on Postgres and other databases with permissions.

API management and event-native gateway for REST, WebSockets, Kafka and webhooks.

Scalar

API Tools

Modern OpenAPI documentation and API client with a first-class reference UI.

AWS AppSync managed GraphQL and Pub/Sub APIs with resolvers to AWS data sources.

Feature-rich GraphQL client for desktop and browser with collections and environments.

Contentful

API Tools

Headless content platform with a CDA/CMA API, previews and a web app.

Desktop and CLI tool to design and run mock REST APIs locally.

curl

Development

Command-line tool and library for transferring data with URLs across many protocols.

Envoy Proxy

Cloud & DevOps

CNCF L7 proxy used as a sidecar, gateway and foundation for service meshes.

Official in-browser IDE for exploring GraphQL schemas and running queries.

API testing tool for SOAP and REST with assertions, security tests and load tests.

Hoppscotch

Development

Open-source API playground that runs in the browser with collections and realtime.

API platform that generates SDKs, docs and a type-safe server from an API definition.