openapistack · users
A growing list of teams shipping production software with the openapi-stack libraries — across open source, internal platforms, and commercial products.
B2B SaaS platform for energy and utility companies. epilot's core APIs are built on openapi-stack — every backend service and SDK in the platform.
Use case: Powers 40+ microservices and their typed JS/TS SDKs end-to-end.
French accounting and financial management unicorn for SMBs and chartered accountants.
Use case: Long-time openapi-stack backer — Pennylane engineers shipped bug-fix PRs to openapi-client-axios and the company sponsored the project in 2022. Still used in their public Jean React Native hiring template.
The official Microsoft 365 Agents Toolkit (formerly Teams Toolkit) for building Copilot agents on Teams.
Use case: Ships in the Custom Copilot RAG template scaffold so every Teams agent project gets openapi-client-axios out of the box.
IBM and Red Hat's joint Node.js reference architecture (maintained by the nodeshift team) recommends openapi-backend for OpenAPI-driven mocking and request handling.
Use case: Recommended for OpenAPI mocking in IBM/Red Hat's Node.js reference architecture.
The SAP Cloud SDK — type-safe JavaScript/TypeScript libraries for SAP S/4HANA and SuccessFactors APIs.
Use case: Powers the mock backend the Cloud SDK uses for its end-to-end test suite.
Nordic ERP, payroll and HR giant operating across Europe with 2+ million customers in 33 countries.
Use case: Publishes @visma/msw-openapi-backend-integration, a public package wiring openapi-backend into Mock Service Worker.
GitHub's official documentation site, the source of truth for the GitHub developer platform.
Use case: Dereferences the GitHub REST API OpenAPI spec for the docs build pipeline.
Amazon Web Services — the official aws-samples organisation hosts reference architectures and demo apps for AWS customers.
Use case: Powers the Berkeley Room Designer sample app — a generator for synthetic room layouts built on the Amazon Berkeley Objects Dataset.
Red Hat Developer Hub — the enterprise Backstage distribution from Red Hat. Co-maintains the IBM/Red Hat Node.js reference architecture that recommends openapi-backend.
Use case: Builds and tests OpenAPI-backed plugins across the RHDH ecosystem.
The all-in-one workspace, used by millions to write, plan, and collaborate.
Use case: Powers the official Notion MCP server, exposing the Notion API to AI agents.
Next-generation Node.js and TypeScript ORM, used by millions of developers.
Use case: Ships in prisma.io/docs via the fumadocs-openapi pipeline.
Intel's open computer-vision model-building platform.
Use case: Validates API requests and mocks responses across the Geti platform services.
Edge cloud platform that powers some of the largest sites on the internet.
Use case: The official OpenAPI Validation Starter Kit for Fastly Compute.
Event-driven agentic workflow engine, originally from Netflix, now stewarded by Orkes.
Use case: Mocks task input forms in the Conductor UI from each task's JSON Schema definition.
No-code data-workflow automation platform for ops and finance teams. $34M+ raised (Series B, 2023); customers include Flexport, Sonos, Uber Freight, Brooklinen.
Use case: Self-attested by a Parabola engineer in a July 2025 Buy Me A Coffee message: "our team are building with openapi-client-axios — thank you!!"
Kong powers the world's most innovative API platforms. The team behind OpenMeter (Kong's open-source usage-based billing and metering product) shipped openapi-stack as part of their integration examples.
Use case: Used (via openapi-client-axios-typegen) in OpenMeter's Stripe integration example for typed API client generation.
Open-source identity and access management. Cloud-native auth for modern apps.
Use case: Used in the Zitadel docs and SDK generation pipeline.
High-performance vector database for next-generation AI applications.
Use case: Powers the self-hosted Qdrant web UI's API client layer.
In-browser developer environments, makers of WebContainers and the Bolt agent.
Use case: Powers the API layer of pkg.pr.new, the per-PR npm preview infrastructure.
The open-source CMS powering a significant share of the web.
Use case: Used in the Drupal CMS Launcher application.
The flexible React.js docs framework powering OpenAPI documentation for Prisma, Better Auth and many others.
Use case: Used inside fumadocs-openapi to resolve $ref pointers when rendering OpenAPI schemas as MDX docs.
The original real-time collaborative document editor, used by Wikimedia, Mozilla and many governments.
Use case: Backs the Etherpad HTTP API surface and request validation.
Open-source software for financial inclusion, a Linux Foundation Mojaloop Foundation project backed by the Gates Foundation.
Use case: Validates and routes API requests across the central-ledger, ml-api-adapter and SDK scheme adapter components.
Enterprise API Management, Integration, and Identity Server, used by Fortune 500s.
Use case: Used in the WSO2 API Manager web applications.
Open-source over-the-air software update manager for IoT devices, by Northern.tech.
Use case: Validates and mocks OpenAPI specifications across the Mender server services.
A peer-to-peer framework for building agent-centric distributed applications.
Use case: Used in the Holochain desktop launcher (Electron) for managing local Holochain apps.
MCP integration platform letting AI agents use tools reliably at any scale.
Use case: Generates typed MCP server bindings from OpenAPI specs across hundreds of SaaS APIs.
Local-first, encrypted, P2P workspace and knowledge graph.
Use case: Powers the Anytype MCP server.
Maker of agdb, an in-process graph database for embedded and cloud workloads.
Use case: Generates types via openapicmd and ships @agnesoft/agdb_api on openapi-client-axios; agdb_studio (their web UI) consumes the same client via pnpm catalog.
European tech consulting firm specialising in software, automotive and energy.
Use case: Ships openapi-cop, a contract-testing proxy built on top of openapi-backend.
Canton Network — privacy-preserving smart contracts for institutional finance.
Use case: Powers the Canton Network quickstart developer experience.
The Finnish National Agency for Education. Operates MPASSid, the national federated single sign-on for Finnish primary, secondary, and higher education.
Use case: Backs the management UI of MPASSid (Virkailijan Opintopolku), used to administer national education-sector identity services.
The City of Helsingborg, Sweden. Runs openapi-backend across the Haffa platform and the city's Generic Digital Infrastructure (GDI) microservices.
Use case: Powers Haffa (a municipal second-hand marketplace) and the city's shared GDI services (mail, SMS, auth, profile).
The Government of British Columbia, Canada. Uses openapi-stack in the Early Childhood Educator Registry (ECER) certification application.
Use case: Powers the ECER public-facing certification portal's typed API client and codegen pipeline.
AI-powered survey for finding consensus across large groups. Famously used in Taiwan's vTaiwan democratic process.
Use case: Backs the Polis HTTP API.
