A collective list of free APIs
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A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.
A unified trading API with more than 100 crypto exchanges and prediction markets in JavaScript / TypeScript / Python / C# / PHP / Go / Java / Rust
An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plugins for formats, models and business rules.
The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.
Blazing fast, instant realtime GraphQL APIs on all your data with fine grained access control, also trigger webhooks on database events.
REST API for any Postgres database
Bitwarden infrastructure/backend (API, database, Docker, etc).
Turn any website into a structured API. Extract, automate, search and monitor the web.
A curated list of free public APIs — searchable, community-maintained, with a free JSON API.
Open-source search database for full-text, vector, and hybrid search with real-time indexing and SQL.
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. CKAN makes it easy to publish, share and use data. It powers catalog.data.gov, open.canada.ca/data, data.humdata.org among many other sites.
Instant REST and MCP APIs for PostgreSQL and MySQL, on existing or new databases. CRUD, custom SQL routes, auth and ACL without writing a backend. Low-code, ⚡ realtime, high-performance. Native MySQL support since v2.5
Open-source reporting platform to build and share live dashboards from APIs, SQL and NoSQL databases, with powerful AI assistant, scheduling, and embeddable charts 📈📊
🎲 Mock or extend your GraphQL API with faked data. No coding required.
Apache Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log-like data
Yaade is an open-source, self-hosted, collaborative API development environment.
An easy to use Fractal wrapper built for Laravel and Lumen applications
DreamFactory is a secure, self-hosted enterprise data access platform that provides governed API access to any data source, connecting enterprise applications and on-prem LLMs with role-based access and identity passthrough.
OpenDota: Open source Dota 2 data platform with automated replay parsing
Node.js database migration management for PostgreSQL
Promise and RxJS APIs around Polkadot and Substrate based chains via RPC calls. It is dynamically generated based on what the Substrate runtime provides in terms of metadata.
zerocode-tdd is a community-developed, free, open-source, outcome-driven automated testing framework for Data Pipelines, ETL, REST API, Kafka(Data Streams), Databases and Load scenarios. all defined in simple JSON or YAML — with zero coding.