Connect

Health v2 · maintenance only

Adoption not part of the score

4110 stars · 157 forks observed · 2026-10-11

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Connect is a family of slim libraries (Go, TypeScript, Swift, Kotlin, Dart, Python) for building browser- and gRPC-compatible HTTP APIs from Protocol Buffer schemas, generating type-safe server and client code. It supports three protocols—gRPC, gRPC-Web, and Connect's own simple HTTP protocol—over HTTP/1.1, HTTP/2, and HTTP/3.

Use cases

• build a protobuf rpc api in go
• call grpc services from the browser
• replace hand-written rest endpoints with generated type-safe clients
• serve grpc-web without a translating proxy like envoy
• add streaming rpcs to a net/http server
• generate a typescript client from a proto schema

When to choose

• you want gRPC-compatible APIs callable with curl or any HTTP client
• you want generated type-safe clients without hand-written boilerplate
• you want to build on net/http or fetch primitives instead of a heavy framework
• you need gRPC, gRPC-Web, and a simple JSON-friendly protocol from one server

When to avoid

• you need a full gRPC implementation with custom name resolution and load balancing
• your stack has no Connect library and you rely on non-Protobuf serialization
• you need client-side bidirectional streaming from web browsers, which browsers don't support

Facets

library · maturity stable

rpc serialization http-server http-client middleware apis web-development backend developer-tools go browser cross-platform protobuf grpc grpc-web connect-protocol code-generation type-safe-client streaming nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="connectrpc/connect-go")