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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
.package(url: "https://github.com/grpc/grpc.git", from: "v1.38.0")

gRPC - An RPC library and framework

gRPC is a modern, open source, high-performance remote procedure call (RPC) framework that can run anywhere. gRPC enables client and server applications to communicate transparently, and simplifies the building of connected systems.

Homepage: grpc.io
Mailing List: grpc-io@googlegroups.com

Join the chat at https://gitter.im/grpc/grpc

To start using gRPC

To maximize usability, gRPC supports the standard method for adding dependencies to a user's chosen language (if there is one). In most languages, the gRPC runtime comes as a package available in a user's language package manager.

For instructions on how to use the language-specific gRPC runtime for a project, please refer to these documents

  • C++: follow the instructions under the src/cpp directory
  • C#: NuGet package Grpc
  • Dart: pub package grpc
  • Go: go get google.golang.org/grpc
  • Java: Use JARs from Maven Central Repository
  • Kotlin: Use JARs from Maven Central Repository
  • Node: npm install grpc
  • Objective-C: Add gRPC-ProtoRPC dependency to podspec
  • PHP: pecl install grpc
  • Python: pip install grpcio
  • Ruby: gem install grpc
  • WebJS: follow the grpc-web instructions

Per-language quickstart guides and tutorials can be found in the documentation section on the grpc.io website. Code examples are available in the examples directory.

Precompiled bleeding-edge package builds of gRPC master branch's HEAD are uploaded daily to packages.grpc.io.

To start developing gRPC

Contributions are welcome!

Please read How to contribute which will guide you through the entire workflow of how to build the source code, how to run the tests, and how to contribute changes to the gRPC codebase. The "How to contribute" document also contains info on how the contribution process works and contains best practices for creating contributions.


Sometimes things go wrong. Please check out the Troubleshooting guide if you are experiencing issues with gRPC.


See the Performance dashboard for performance numbers of master branch daily builds.


See gRPC Concepts

About This Repository

This repository contains source code for gRPC libraries implemented in multiple languages written on top of a shared C core library src/core.

Libraries in different languages may be in various states of development. We are seeking contributions for all of these libraries:

Language Source
Shared C [core library] src/core
C++ src/cpp
Ruby src/ruby
Python src/python
PHP src/php
C# (core library based) src/csharp
Objective-C src/objective-c
Language Source repo
Java grpc-java
Kotlin grpc-kotlin
Go grpc-go
NodeJS grpc-node
WebJS grpc-web
Dart grpc-dart
.NET (pure C# impl.) grpc-dotnet


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Last commit: 9 hours ago

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Release Notes

Release v1.38.0
4 weeks ago

This is release 1.38.0 (guadalupe_river_park_conservancy) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

This release contains refinements, improvements, and bug fixes, with highlights listed below.


  • Invalidate ExecCtx now before computing timeouts in all repeating timer events using a WorkSerializer or combiner. (#26086)
  • Revert #16288. (#25827)
  • Fix use-after-unref bug in fault_injection_filter. (#25903)
  • Fix #25897 to avoid crashes when certificates are not yet updated. (#25899)
  • gRPC EventEngine Interface. (#25795)
  • Allow the AWS_DEFAULT_REGION environment variable. (#25760)


  • s/OnServingStatusChange/OnServingStatusUpdate. (#26010)
  • cmake: only install channelz if gRPC_USE_PROTO_LITE is off. (#25772)


  • Grpc.Tools: Use x64 protoc on macOS arm64. (#26080)
  • Provide runtime/framework info in gRPC C# user agent string. (#25889)


  • Add grpcio-admin Python package. (#26166)
  • Add CSDS API to Python. (#26114)
  • Expose code and details from context on the server side. (#25457)
  • Explicitly import importlib.abc; required on Python 3.10. Fixes #26062. (#26083)
  • Fix potential deadlock on the GIL in AuthMetdataPlugin. (#26009)
  • Introduce new Python package "xds_protos". (#25975)
  • also build python3.6 aarch64 manylinux2014 wheel. (#25928)
  • Remove async mark for set_trailing_metadata interface. (#25814)


  • ruby: use x86_64 binary on M1 macs. (#25756)
  • Add ruby 3.0 support for mac binary packages. (#25429)

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