# Mercurius Plans

Mercurius is a free, open-source project released under the MIT License. There are no commercial pricing tiers, subscription plans, or paid editions.

## Open Source (Free)

- **License:** MIT
- **Cost:** Free — no purchase, subscription, or API key required
- **Hosting:** Self-hosted on your own Node.js/Fastify infrastructure
- **Support:** Community support via GitHub Issues and Discussions

## What Is Included

All features are available in the single open-source release:

| Feature | Included |
|---|---|
| GraphQL query / mutation support | Yes |
| JIT compilation via graphql-jit | Yes |
| Query parsing and validation cache | Yes |
| Automatic dataloader / N+1 prevention | Yes |
| Subscriptions (WebSocket) | Yes |
| Federation (gateway + services) | Yes |
| Batched queries | Yes |
| Persisted queries | Yes |
| Authentication plugin (@mercuriusjs/auth) | Yes |
| Validation plugin (@mercuriusjs/validation) | Yes |
| Caching plugin (@mercuriusjs/cache) | Yes |
| TypeScript support & codegen | Yes |
| GraphiQL / Playground UI | Yes |

## Commercial Support

Mercurius is closely associated with **NearForm** (https://nearform.com), who employ several of its core maintainers and publish articles and guides on its use. NearForm offers professional services, consulting, and training around Node.js and Fastify ecosystems, which implicitly covers Mercurius. Contact NearForm directly for enterprise support arrangements.

## References

- GitHub repository: https://github.com/mercurius-js/mercurius
- npm package: https://www.npmjs.com/package/mercurius
- License file: https://github.com/mercurius-js/mercurius/blob/master/LICENSE