Insomnia
Freemium
An open-source API client for REST, GraphQL, gRPC and more, with AI help from Kong.
About Speakeasy
Speakeasy takes an OpenAPI spec and produces client libraries in many languages, so API companies don't have to hand-write and maintain each one. The generated SDKs handle things like retries, pagination and type safety.
It can also produce Terraform providers and MCP servers from the same spec, along with documentation. When the spec changes, the SDKs update, which keeps them from drifting out of date.
Speakeasy offers a free tier to try it and paid plans for teams that publish SDKs commercially. It is aimed at API providers who want a polished developer experience without a dedicated SDK team.
Standout features
- SDK generation
- Terraform provider generation
- MCP server generation
- Auto-updating clients
- Many languages
- CI integration
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