Connect-RPC

aid: connect-rpc
name: Connect-RPC
description: 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.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Provider
access: Open Source
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/connect-rpc.png
url: https://raw.githubusercontent.com/api-evangelist/connect-rpc/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-04-28'
specificationVersion: '0.19'
kind: opensource
tags:
- Apache 2.0
- Buf
- Code Generation
- Connect Protocol
- gRPC
- gRPC-Web
- HTTP
- Open Source
- Protocol Buffers
- RPC
- SDKs
apis:
- aid: connect-rpc:connect-go
  name: connect-go
  description: 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 protoc-gen-connect-go plugin and designed to slot into idiomatic
    net/http servers.
  humanURL: https://connectrpc.com/docs/go/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Go
  - SDK
  properties:
  - type: Documentation
    url: https://connectrpc.com/docs/go/
  - type: GettingStarted
    url: https://connectrpc.com/docs/go/getting-started
  - type: GitHub
    url: https://github.com/connectrpc/connect-go
  - type: Tutorial
    url: https://connectrpc.com/docs/go/tutorial
  x-features:
  - Connect Protocol Server and Client
  - gRPC Compatibility
  - gRPC-Web Compatibility
  - Streaming RPCs
  - Interceptors
  - Idiomatic net/http Integration
  x-use-cases:
  - Build a Go service callable from browsers and gRPC clients
  - Migrate gRPC services to Connect without breaking clients
  - Add HTTP/JSON access to existing Protobuf services
- aid: connect-rpc:connect-es
  name: connect-es (Connect for ECMAScript)
  description: 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 TypeScript types and tree-shakable output.
  humanURL: https://connectrpc.com/docs/web/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - JavaScript
  - SDK
  - TypeScript
  properties:
  - type: Documentation
    url: https://connectrpc.com/docs/web/
  - type: GettingStarted
    url: https://connectrpc.com/docs/web/getting-started
  - type: GitHub
    url: https://github.com/connectrpc/connect-es
  x-features:
  - Browser Clients
  - Node.js Clients
  - Node.js Servers
  - Tree-Shakable Bundles
  - Type-Safe TypeScript
  - gRPC-Web Compatibility
  x-use-cases:
  - Call Protobuf services from React, Vue, or vanilla JS
  - Build Node.js servers without a gRPC dependency
  - Share TypeScript types between client and server
- aid: connect-rpc:connect-swift
  name: connect-swift
  description: 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.
  humanURL: https://connectrpc.com/docs/swift/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - iOS
  - SDK
  - Swift
  properties:
  - type: Documentation
    url: https://connectrpc.com/docs/swift/
  - type: GettingStarted
    url: https://connectrpc.com/docs/swift/getting-started
  - type: GitHub
    url: https://github.com/connectrpc/connect-swift
  x-features:
  - URLSession Integration
  - Streaming Support
  - gRPC and gRPC-Web Clients
  - Async/Await API
  x-use-cases:
  - Call Protobuf services from iOS apps
  - Add streaming RPC to Apple platform clients
- aid: connect-rpc:connect-kotlin
  name: connect-kotlin
  description: 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-kotlin.
  humanURL: https://connectrpc.com/docs/kotlin/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Android
  - JVM
  - Kotlin
  - SDK
  properties:
  - type: Documentation
    url: https://connectrpc.com/docs/kotlin/
  - type: GettingStarted
    url: https://connectrpc.com/docs/kotlin/getting-started
  - type: GitHub
    url: https://github.com/connectrpc/connect-kotlin
  x-features:
  - Coroutines API
  - OkHttp Transport
  - Streaming Support
  - Multi-Protocol Client
  x-use-cases:
  - Call Protobuf services from Android apps
  - Share Kotlin types across mobile and backend
- aid: connect-rpc:connect-python
  name: connect-python
  description: Connect for Python (beta) provides Connect protocol and gRPC clients generated from Protobuf schemas. Targets
    ASGI servers and async Python with type-safe stubs.
  humanURL: https://connectrpc.com/docs/python/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  tags:
  - Python
  - SDK
  properties:
  - type: Documentation
    url: https://connectrpc.com/docs/python/
  - type: GitHub
    url: https://github.com/connectrpc/connect-python
  x-features:
  - ASGI Integration
  - Type-Safe Stubs
  - Connect and gRPC Clients
  x-use-cases:
  - Add Protobuf RPC to Python services
  - Call Connect services from data-science notebooks
common:
- type: DomainSecurity
  url: security/connect-rpc-domain-security.yml
- type: Website
  url: https://connectrpc.com
- type: Documentation
  url: https://connectrpc.com/docs/introduction
- type: GitHubOrganization
  url: https://github.com/connectrpc
- type: Demo
  url: https://connectrpc.com/demo
- type: Blog
  url: https://buf.build/blog
- url: https://buf.build/blog/rss.xml
  type: BlogRSS
  description: Discovered RSS/Atom feed for https://buf.build/blog
- type: Maintainer
  url: https://buf.build
- type: License
  url: https://github.com/connectrpc/connect-go/blob/main/LICENSE
- type: Slack
  url: https://buf.build/links/slack
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com