Feature
Open Source
Source code published under an open license.
123 providers
516 APIs
118 declared variants
The implementation is openly licensed and publicly readable, so integrators can audit behavior, fork, and contribute. Also changes the risk calculus on vendor continuity.
123 API providers on the APIs.io network offer open source. The highest-rated are Canvas LMS, Commerce Layer, Outbrain, APIs.io, Highlight (highlight.io).
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 7 Complete, well-documented, and agent-ready
Canvas LMSCanvas is the open, AGPLv3-licensed learning management system created and maintained by Instructure, Inc. ...Commerce LayerCommerce Layer is the headless, multi-market commerce API used by global brands to sell everywhere — web, m...OutbrainOutbrain Inc. (NASDAQ: OB), which closed its acquisition of Teads in early 2025 and now operates public...APIs.ioAPIs.io is an open-source API search engine and federated discovery network built on the APIs.json specific...Highlight (highlight.io)Highlight (highlight.io) is the open-source, full-stack monitoring platform — session replay, error monitor...Inworld AIInworld AI is a real-time voice AI infrastructure provider. The Inworld platform delivers text-to-speech, s...AirbyteAirbyte is an open-source data integration platform that enables businesses to easily and efficiently move ...
Strong 32 Solid coverage with minor gaps
BuildkiteBuildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se...IBM QuantumIBM Quantum is IBM's quantum computing program — the operator of the IBM Quantum Platform (quantum.cloud.ib...E2BE2B (e2b-dev) provides secure, isolated cloud sandboxes for AI agents and AI-generated code, built on a for...GitLabGitLab Inc. is an open-core company that develops GitLab, a DevOps software platform for building, securing...DaytonaDaytona is open-source, secure, and elastic infrastructure for running AI-generated code. Daytona sandboxes...ankrAnkr is a Web3 infrastructure provider whose multichain RPC, Advanced API, liquid staking, contract automat...fireblocksFireblocks is an institutional digital-asset and stablecoin infrastructure company providing MPC-secured cu...CumulocityCumulocity is an enterprise AIoT (Artificial Intelligence of Things) platform that connects, manages, and a...D-WaveD-Wave Quantum Inc. (NYSE: QBTS) is the leader in commercial quantum annealing computing and developer of t...SensibleSensible is a document-automation API platform that extracts structured data from PDFs, images, spreadsheet...UmamiUmami is an open source, privacy-first web analytics platform that provides website traffic insights withou...Microsoft Azure QuantumMicrosoft Azure Quantum is Microsoft's cloud quantum computing service — an open, multi-vendor platform tha...HyperbolicHyperbolic is an open-access AI cloud and decentralized GPU marketplace serving 200,000+ builders with affo...MewsMews is a cloud-native hospitality operating system serving 15,000+ hotels, hostels, and vacation-rental pr...NanonetsNanonets is a no-code document AI and OCR platform that combines a custom-model OCR API, pre-built document...PaperspacePaperspace is a GPU cloud platform for AI, ML, and 3D rendering workloads, acquired by DigitalOcean in 2023...RecraftRecraft is a London-based AI design platform — founded in 2023 by Anna Veronika Dorogush (creator of the Ca...Leonardo.AILeonardo.AI is an Australian generative-AI company (acquired by Canva in July 2024) offering a Production A...Google Quantum AIGoogle Quantum AI is Google's quantum-computing research and engineering arm, building superconducting quan...Pocket NetworkPocket Network is the decentralized RPC layer of Web3 — a permissionless, fully open data delivery protocol...LichessLichess is a free, ad-free, open-source online chess server operated by a French nonprofit and powered enti...ThingsBoardThingsBoard is an open-source IoT platform for device connectivity, data collection, processing, and visual...CivitaiCivitai is the largest open community for Stable Diffusion, SDXL, Flux, and video AI models — hosting over ...VespaVespa is an open-source AI search engine, big-data serving engine, and vector database originally developed...ContinueContinue is the open-source AI code assistant for VS Code and JetBrains, distributed under Apache 2.0. The ...PipedreamPipedream is a developer-centric integration platform providing three product lines: Workflows (code-level ...Beatoven.aiBeatoven.ai is an Indian generative-music startup (Bengaluru, founded 2021) building text-to-music and text...ConektaConekta is a Mexico-based payment processor that lets businesses accept credit and debit cards, OXXO cash v...Academy Software FoundationThe Academy Software Foundation (ASWF) is a Linux Foundation project that supports open source software dev...BackpackBackpack is a Solana-first crypto company founded by Armani Ferrante and Tristan Yver — the same team behin...EncoreEncore is a backend application framework and developer cloud that lets engineering teams build type-safe d...Octopus EnergyOctopus Energy is a UK-founded retail energy supplier and the parent of Kraken Technologies, the AI-powered...
Developing 32 Usable, with meaningful gaps to close
1NCE1NCE is a Cologne-headquartered global IoT connectivity provider best known for the IoT Lifetime Flat — a s...ServiceTitanServiceTitan is the operating system for the trades — all-in-one field service management software for resi...arXivarXiv is the open-access e-print repository operated by Cornell Tech, hosting more than two million preprin...TIDALTIDAL is a high-fidelity music streaming service owned by Block (Square's parent, acquired 2021) offering H...TensorTensor is the Solana-native NFT marketplace and trading protocol founded by Tensor HQ and now stewarded by ...StytchStytch is an authentication and identity infrastructure provider. Its Consumer and B2B APIs cover passwordl...WooCommerceWooCommerce is the world's most popular open-source eCommerce platform, built on WordPress. It provides a c...DescopeDescope is a customer and agentic identity access management (CIAM) platform founded in 2022 by veterans of...LangWatchLangWatch is an open-source LLM observability, evaluation, and AI agent testing platform. Built around Open...n8nn8n is a fair-code workflow automation and iPaaS platform with AI-agent tooling. It exposes an instance-sco...Triton OneTriton One is a high-performance Solana RPC and blockchain infrastructure provider operating globally distr...Radio BrowserRadio Browser is a free, community-driven directory of internet radio stations. The project publishes a pub...ForethoughtForethought is a San Francisco-based generative AI customer-support platform. Its multi-agent product suite...NangoNango.dev is a developer infrastructure platform that simplifies building product integrations with externa...UnityUnity is a real-time 3D content creation platform — the Unity engine powers cross-platform games, simulatio...PokéAPIPokéAPI (pokeapi.co) is a free, open-source RESTful and GraphQL API serving comprehensive Pokémon data — in...MedusaMedusa is an open-source headless commerce platform written in Node.js and TypeScript, distributed under th...OpenHandsOpenHands (by All Hands AI, formerly OpenDevin) is an open-source autonomous coding agent platform. Ships a...ChromaChroma (Chroma DB) is an open-source AI-native embedding database designed to make it easy to build LLM app...CerbosCerbos is an open-core, language-agnostic, scalable authorization platform that decouples access control fr...Children's Hospital of PhiladelphiaFounded in 1855 as the first hospital in the United States dedicated to the healthcare of children, Childre...PackagistPackagist is the default package repository for Composer, the PHP dependency manager. It indexes over 454,0...JaegerJaeger is an open-source, end-to-end distributed tracing platform for monitoring and troubleshooting transa...AgStack FoundationAgStack Foundation is a Linux Foundation project providing open-source digital infrastructure for the agric...VA LighthouseVA Lighthouse is the US Department of Veterans Affairs' developer API platform. Published at developer.va.g...DoclingDocling is an open-source toolkit for parsing diverse document formats — PDF, DOCX, PPTX, XLSX, HTML, image...ipifyipify operates two complementary IP APIs. The free Public IP Address API (api.ipify.org, api6.ipify.org, ap...crates.iocrates.io is the official package registry for the Rust programming language, operated by the crates.io tea...RedisRedis is an open source, in-memory data structure store used as a database, cache, message broker, and stre...FrankfurterFrankfurter is an open-source (MIT) currency exchange rates API that blends foreign-exchange reference rate...TypesenseTypesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi...KreaKrea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g...
Thin 22 Limited public surface area
JitsiJitsi is a collection of free and open-source projects for secure, simple, and scalable real-time video con...SyndicaSyndica is a Solana-only infrastructure company building developer infrastructure for Web3. Its production ...ACI.devACI.dev (Aipolabs Agent-Computer Interface) is an open-source tool-calling platform that hooks AI agents in...TurborepoTurborepo is a high-performance build system for JavaScript and TypeScript codebases, built by Vercel and w...RenovateRenovate is an open source automated dependency update bot maintained by Mend. It scans repositories for re...FormantFormant is a San Francisco–based robotics and physical-operations cloud platform that lets companies operat...McKinsey & CompanyMcKinsey & Company is the senior partner of the MBB triumvirate of global strategy and management consultin...AudiomackAudiomack is an on-demand music streaming and audio discovery platform that lets artists and creators uploa...CieloCielo is one of the largest Brazilian card acquirers and a publicly traded company (B3:CIEL3), originally f...Eyevinn TechnologyEyevinn Technology is a Stockholm, Sweden based video streaming consultancy and open source company special...Cypress SemiconductorCypress Semiconductor was a US-based semiconductor company known for its PSoC programmable system-on-chip m...Deutsche TelekomDeutsche Telekom AG is Europe's largest telecommunications operator, headquartered in Bonn, Germany, servin...Random User GeneratorFree random user data API for generating realistic fake user profiles with names, addresses, photos, and co...XanaduXanadu is a Canadian photonic quantum computing company building room-temperature, fault-tolerant, scalable...American AirlinesAmerican Airlines is one of the world's largest airlines, operating an extensive domestic and international...BMW ConnectedDriveBMW ConnectedDrive is BMW Group's umbrella for connected vehicle services spanning navigation, remote servi...Quote GardenQuote Garden is a free, open-source REST API that serves more than 75,000 famous quotes. Built by Prathames...GlamaGlama is an all-in-one AI workspace combining an MCP server marketplace and registry, a managed MCP gateway...Volvo CarsVolvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ...CasdoorCasdoor is an open-source, AI-first identity and access management (IAM) and MCP gateway authentication ser...FirelyFirely is an Amsterdam-based health IT company and one of the original co-developers of the HL7 FHIR (Fast ...YarnYarn is an open-source JavaScript package manager and project manager originally created at Facebook in 201...
Emerging 24 Early or largely undocumented
SignifydSignifyd is an ecommerce fraud prevention, chargeback protection, and revenue optimization platform. Its Co...RakenRaken is a San Diego-based construction technology company providing a field-first daily reporting and fiel...ScenarioScenario is a Paris- and San Francisco-headquartered AI platform for game asset generation founded in 2021 ...ApiaryApiary is an API design and documentation platform, now part of Oracle Cloud Infrastructure. With 486,000+ ...Three.jsThree.js is an open-source JavaScript 3D library originally created by Ricardo Cabello (mrdoob) in 2010 and...WhyLabsWhyLabs was an AI observability platform focused on data and model monitoring for both classical ML and LLM...XanaduXanadu is a Toronto-based photonic quantum computing company building cloud-accessible continuous- variable...QuEra ComputingQuEra Computing is a Boston-based neutral-atom quantum computing company (founded 2018) that operates Aquil...SSTSST is an open source TypeScript framework for building full-stack applications on your own infrastructure....Analog DevicesAnalog Devices (ADI) is a global semiconductor company designing high-performance analog, mixed-signal, and...QuantinuumQuantinuum is an integrated quantum computing company formed by the 2021 merger of Honeywell Quantum Soluti...pnpmpnpm is a fast, disk space efficient package manager for JavaScript and Node.js projects. It uses a content...ApivaultApivault is an open-source directory and gateway for discovering public APIs. The platform catalogs thousan...PasqalPasqal is a French neutral-atom quantum computing company headquartered in Palaiseau, France and co-founded...SonySony Group Corporation is a Japanese multinational spanning electronics, gaming, entertainment, image senso...Apache Software FoundationThe Apache Software Foundation (ASF) is a 501(c)(3) nonprofit organization that provides open source softwa...GSKGSK plc (formerly GlaxoSmithKline, rebranded in May 2022) is a global biopharma headquartered in the United...Refact.aiRefact.ai is an open-source, local-first AI coding assistant and autonomous software-engineering agent buil...AutomatischAutomatisch is an open source business automation tool and self-hosted alternative to Zapier that connects ...ChangelogChangelog is a media company and podcast network for developers covering open source and software developme...SatellogicSatellogic is an Argentine-founded, U.S.-listed (NASDAQ: SATL) vertically integrated Earth observation comp...CometComet is Perplexity's AI-native browser built on Chromium (Blink), integrating Perplexity Search and an age...BoschBosch is a German multinational engineering and technology company producing automotive components, industr...CHAOSSCHAOSS (Community Health Analytics in Open Source Software) is a Linux Foundation project that develops met...
Minimal 6 Almost no public developer surface
CHIPS AllianceCHIPS Alliance is a Linux Foundation project (founded in 2019) that develops open-source hardware (silicon)...Fox CorporationFox Corporation (NASDAQ: FOXA, FOX) is a US media company spun out of 21st Century Fox in 2019 when the res...SchrödingerSchrödinger is a New York-headquartered (NASDAQ: SDGR) computational science company that develops a physic...OctoAIOctoAI (formerly OctoML) was a Seattle-based AI inference platform founded in 2019 as a University of Washi...Rolls-RoyceRolls-Royce plc is a British multinational aerospace and defense company manufacturing aero engines (Trent ...ether.fiether.fi is a non-custodial, decentralized Ethereum liquid restaking protocol where stakers retain control ...
What Providers Actually Declared
This feature is a canonical term. These are the free-text strings
providers wrote in their own apis.yml that map onto it.
100% open source under Apache 2.0 (with separate commercial license for `highlight.io/` and `enterprise/` directories)150+ pre-built configurations in the open-source sensible-configuration-library covering common document types (1040, W-2, 1099, ACORD forms, loss runs, bank statements, rate confirmations)25+ open-source inference models — Llama 3.1 8B/70B/405B, Qwen 2.5, DeepSeek V3, DeepSeek R1, Hermes 3, Mistral, Llama 3.2 Vision, Qwen2-VL300+ Open Source Projects3D Scene module with custom-layer extensibility (open-source 3d-viewer-module)AGPL-3.0 Open SourceAll Google Quantum AI open-source software is Apache 2.0 licensedApache 2.0 LicenseApache 2.0 Open Source LicenseApache 2.0 licensed; governance via GOVERNANCE.md and MAINTAINERS.mdApache 2.0 open-source licensing for pytket, qnexus, lambeq, Guppy, Selene, QermitAutoChain — open-source lightweight framework for building and testing LLM agents (1.8k+ GitHub stars)Browser-side background-removal JS library and Blender texturing plugin available as open sourceC# scripting with hot-reload, the Unity Scripting API, and full source available via UnityCsReferenceCompanion BMW Car IT open-source stack (joynr, ramses, MoCOCrW, python-dlt) underpinning connected-vehicle middlewareCore: free open-source self-managedFirely .NET SDK — official open-source C# FHIR library (de-facto reference SDK)Free open-source MCP server hostingFree open-source WordPress pluginFree, ad-free, open-source online chess server operated by a French nonprofit, funded by donationsGSK Biostatistics Open SourceHosted Flow app (React) with full source available for self-hostingHosted micro frontends: checkout, cart, my-account, microstore, identity — each open-source on GitHubKrea Realtime experience with sub-50ms image generation and an open-source Realtime 14B autoregressive video model distilled from Wan 2.1 (CC BY-NC-SA 4.0)Local MCP server (Node.js, billed against API units) — open source on GitHubMIT LicenseMIT licensed, no required runtime dependencies, runs in browser, Node.js, Electron, Tauri, Deno, and React NativeMIT licensed, open source on GitHub (vercel/turborepo)MIT-licensed open sourceMIT-licensed open source codebase (composer/packagist) — operated, not designed for reuseMulti-turn agent simulations with User Simulator and Judge Agents (open-source `scenario` framework)Ocean SDK — Python open-source SDK covering dimod, dwave-system, dwave-cloud-client, hybrid, samplersOfficial OpenAPI 3.1 specification published under MIT license at github.com/conekta/openapiOn-chain programs are open-source (Apache-2.0) Anchor programs published as IDLs, npm packages, and Rust cratesOpen SourceOpen Source (BSD-3-Clause)Open Source (MIT)Open Source Cloud (OSC)Open Source EcosystemOpen Source Focus
Showing 40 of 118 declared variants
Work with this as data
Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.