GraphQL APIs & API clients: top picks for 2026

The Postgres development platform, offering a hosted Postgres database with auth, auto-generated APIs, storage and realtime features as a Firebase alternative.

Open-source API development ecosystem for sending REST, GraphQL, WebSocket, SSE, Socket.IO and MQTT requests, offered as web, desktop and CLI apps.

Open-source, self-hosted headless CMS in TypeScript that generates REST and GraphQL content APIs from your content models.

An open-source CRM you can extend as code, with objects, views, workflows and AI agents, built on TypeScript, React and PostgreSQL.

A React-based framework for building fast websites and apps, pulling data from CMSs, Markdown and APIs through GraphQL.

Open-source cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC, with local, Git and cloud storage.

Wraps any SQL database with instant REST and GraphQL APIs, a visual admin Studio, and a native MCP server for AI agents.

Open-source engine that instantly exposes databases such as PostgreSQL, MongoDB and SQL Server as a secure GraphQL API with fine-grained access control.

A React framework for building admin dashboards and back-office single-page apps on top of REST or GraphQL APIs, using Material UI.

Open-source tool that generates a responsive, three-panel API reference site from OpenAPI, Swagger, AsyncAPI, or GraphQL definitions.

GraphQL-native, API-only commerce platform in Python for building headless online stores with composable backends.

Open source Node.js backend that provides REST and GraphQL APIs, user auth, file storage and push notifications on MongoDB or PostgreSQL.

Open-source semantic layer that defines metrics and business logic once and serves them via SQL, REST and GraphQL APIs to BI tools and AI agents.

The JavaScript reference implementation of GraphQL, for building typed schemas and executing queries in Node.js and browsers.

A GraphQL client for TypeScript and JavaScript with normalized caching, React hooks, and framework support for Vue, Angular and Svelte.

A desktop API client for REST, GraphQL, WebSocket, SSE and gRPC, built with Tauri, Rust and React, offline-first and without telemetry.

RedwoodJS's GraphQL package, the optional GraphQL API layer of the Redwood full-stack React framework, built on GraphQL Yoga and Envelop.

GraphiQL is an in-browser GraphQL IDE, plus the monorepo of language services, editor modes and LSP servers that power it and GraphQL editor tooling.

Open-source headless CMS that edits Markdown, MDX, JSON and YAML content stored in your own Git repository, with a GraphQL API.

Self-hosted experience operating system that combines marketing, sales, support and operations tools on a plugin-based core.

A self-hosted PHP content management system for building custom websites and digital experiences, with a Twig templating layer and auto-generated GraphQL API.

Go-based API service for classical Chinese poetry, offering REST and GraphQL endpoints over a corpus of nearly 400,000 poems in simplified and traditional Chinese.

Terminal API client that stores HTTP, GraphQL, gRPC, WebSocket and SSE requests as plain .http files you can version in git.

A local-first desktop API client for HTTP, gRPC, GraphQL and WebSocket, built with Wails 3 and Vue 3.