Skip to content
Navigation Menu
Toggle navigation
Sign in
Appearance settings
capnproto
Platform
GitHub Copilot
Write better code with AI
GitHub Spark
New
Build and deploy intelligent apps
GitHub Models
New
Manage and compare prompts
GitHub Advanced Security
Find and fix vulnerabilities
Actions
Automate any workflow
Codespaces
Instant dev environments
Issues
Plan and track work
Code Review
Manage code changes
Discussions
Collaborate outside of code
Code Search
Find more, search less
Explore
Why GitHub
Documentation
GitHub Skills
Blog
Integrations
GitHub Marketplace
MCP Registry
View all features
Solutions
By company size
Enterprises
Small and medium teams
Startups
Nonprofits
By use case
App Modernization
DevSecOps
DevOps
CI/CD
View all use cases
By industry
Healthcare
Financial services
Manufacturing
Government
View all industries
View all solutions
Resources
Topics
AI
DevOps
Security
Software Development
View all
Explore
Learning Pathways
Events & Webinars
Ebooks & Whitepapers
Customer Stories
Partners
Executive Insights
Open Source
GitHub Sponsors
Fund open source developers
The ReadME Project
GitHub community articles
Repositories
Topics
Trending
Collections
Enterprise
Enterprise platform
AI-powered developer platform
Available add-ons
GitHub Advanced Security
Enterprise-grade security features
Copilot for business
Enterprise-grade AI features
Premium Support
Enterprise-grade 24/7 support
Pricing
Search or jump to...
Search code, repositories, users, issues, pull requests...
Search syntax tips
Provide feedback
Saved searches
Use saved searches to filter your results more quickly
Sign in
Sign up
Appearance settings
Resetting focus
You signed in with another tab or window.
Reload
to refresh your session.
You signed out in another tab or window.
Reload
to refresh your session.
You switched accounts on another tab or window.
Reload
to refresh your session.
Dismiss alert
{{ message }}
Cap'n Proto
Overview
Repositories
Projects
Packages
People
More
Overview
Repositories
Projects
Packages
People
All
Change the repository type filter
All
Search repositories
Search
Repositories list
13 repositories
Last pushed
Comfortable display density
Compact display density
capnproto
Public
Cap'n Proto serialization/RPC system - core tools and C++ library
C++
•
Other
•
993
•
13k
•
196
•
89
•
Updated
Nov 2, 2025
Nov 2, 2025
capnproto-rust
Public
Cap'n Proto for Rust
Rust
•
MIT License
•
242
•
2.3k
•
69
•
14
•
Updated
Oct 29, 2025
Oct 29, 2025
go-capnp
Public
capnproto/go-capnp’s past year of commit activity
Cap'n Proto library and code generator for Go
go
golang
serialization
+ 7
rpc
capabilities
capnproto
capn-proto
capnp
capability-based
object-capabilities
Go
•
Other
•
118
•
1.3k
•
54
•
3
•
Updated
Oct 25, 2025
Oct 25, 2025
pycapnp
Public
capnproto/pycapnp’s past year of commit activity
Cap'n Proto serialization/RPC system - Python bindings
Cython
•
BSD 2-Clause "Simplified" License
•
130
•
517
•
98
•
2
•
Updated
Oct 23, 2025
Oct 23, 2025
capnproto-java
Public
capnproto/capnproto-java’s past year of commit activity
Cap'n Proto in pure Java
Java
•
Other
•
89
•
437
•
32
•
8
•
Updated
Oct 17, 2025
Oct 17, 2025
kj-rs
Public
capnproto/kj-rs’s past year of commit activity
Rust binding for libkj
C++
•
Apache License 2.0
•
0
•
2
•
0
•
0
•
Updated
Jun 4, 2025
Jun 4, 2025
capnp-ocaml
Public
OCaml code generator plugin for the Cap'n Proto serialization framework
OCaml
•
Other
•
20
•
102
•
6
•
3
•
Updated
Jul 19, 2023
Jul 19, 2023
ekam
Public
capnproto/ekam’s past year of commit activity
Ekam Build System
C++
•
Apache License 2.0
•
34
•
232
•
13
•
1
•
Updated
Dec 13, 2022
Dec 13, 2022
node-capnp
Public
capnproto/node-capnp’s past year of commit activity
Cap'n Proto bindings for Node.js
C++
•
BSD 2-Clause "Simplified" License
•
35
•
281
•
15
•
3
•
Updated
Oct 6, 2021
Oct 6, 2021
capnproto-dlang
Public
capnproto/capnproto-dlang’s past year of commit activity
Cap'n Proto in pure D
C++
•
Other
•
7
•
20
•
6
•
0
•
Updated
Apr 29, 2020
Apr 29, 2020
capnp-rpc-rust
Public
Cap'n Proto RPC for Rust
16
•
127
•
4
•
0
•
Updated
Feb 17, 2018
Feb 17, 2018
capnp-futures-rs
Public
async serialization for Cap'n Proto messages in Rust
4
•
24
•
1
•
0
•
Updated
Feb 17, 2018
Feb 17, 2018
capnpc-rust
Public
capnproto/capnpc-rust’s past year of commit activity
Cap'n Proto code generation for Rust
25
•
79
•
3
•
0
•
Updated
Feb 17, 2018
Feb 17, 2018
You can’t perform that action at this time.