# Connect-RPC

**Canonical:** https://apis.io/providers/connect-rpc/  
**Website:** https://connectrpc.com  
**APIs profiled:** 5

Connect is a slim framework for building browser-friendly and gRPC-compatible HTTP APIs from Protocol Buffer schemas. Servers built with Connect speak the Connect protocol, gRPC, and gRPC-Web simultaneously, while clients can switch between protocols without changing code. Connect provides type-safe SDKs for Go, TypeScript/JavaScript, Swift, Kotlin, and Python, plus the Buf-generated `protoc-gen-connect-*` code generators. The project is open source under the Apache 2.0 license and is maintained by Buf.

## Kin Score — 14.3 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 14.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (5)

- **connect-go** — The Go implementation of Connect. Provides server handlers and clients that speak the Connect, gRPC, and gRPC-Web protocols simultaneously. Generated from .proto files via the p...
- **connect-es (Connect for ECMAScript)** — Connect for ECMAScript provides type-safe browser and Node.js clients and Node.js servers from Protobuf schemas. Targets the Connect protocol and gRPC-Web with idiomatic TypeScr...
- **connect-swift** — Connect for Swift provides type-safe Connect, gRPC, and gRPC-Web clients for iOS, macOS, watchOS, and tvOS apps, generated from Protobuf schemas via protoc-gen-connect-swift.
- **connect-kotlin** — Connect for Kotlin provides type-safe clients for Android and JVM applications. Speaks the Connect protocol, gRPC, and gRPC-Web from a single SDK generated by protoc-gen-connect...
- **connect-python** — Connect for Python (beta) provides Connect protocol and gRPC clients generated from Protobuf schemas. Targets ASGI servers and async Python with type-safe stubs.

## Security (1)

- **Connect Rpc Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Connect Rpc Plans Pricing**

## Tags

Apache 2.0, Buf, Code Generation, Connect Protocol, gRPC, gRPC-Web, HTTP, Open-Source, Protocol Buffers, RPC, SDK

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/connect-rpc/). Scores are computed from the provider's own public artifacts under a published rubric.