{"categories":[{"label":"Communications","url":"https://skillfed.io/packages/category/communications"}],"enrichment":{"capability":"pycapnp is a Python binding for Cap'n Proto, a serialization and RPC framework enabling efficient schema-based message exchange and remote procedure calls.","skillfed_tags":["serialization","rpc","schema-driven"],"use_cases":["Serialize structured data to compact binary format for efficient storage or network transmission.","Implement RPC servers and clients with async/await support for inter-process communication.","Define strongly-typed message schemas to enforce data contracts across service boundaries.","Build distributed systems where serialization overhead and latency are critical.","Exchange data with other Cap'n Proto implementations using shared schema definitions."],"what_it_does":"pycapnp wraps the C++ Cap'n Proto library, bringing schema-driven serialization and RPC to Python. Cap'n Proto is a data interchange format designed for speed\u2014messages defined in a schema serialize to compact binary format, avoiding deserialization overhead. The library supports both synchronous and asynchronous RPC via a promise-style API, useful for distributed systems where efficiency matters.\n\nThe package includes prebuilt wheels for Python 3.9 through 3.14 on Linux, macOS, and Windows, though source builds require compilation tooling. It depends only on jinja2 at runtime. The library is actively maintained with recent fixes for memory leaks and NULL pointer dereferences, stable since initial release in 2013.","worth_installing":"Yes, if you need schema-driven serialization and RPC with Cap'n Proto and can meet C++14 compiler and build-tool requirements. Production-stable, actively maintained, no known vulnerabilities, prebuilt wheels for common platforms. Not recommended if you cannot install a C++ compiler or prefer pure-Python serialization."},"id":"pycapnp","links":{"html":"https://skillfed.io/packages/pycapnp","md":"https://skillfed.io/packages/pycapnp.md","pypi":"https://pypi.org/project/pycapnp/"},"maintenance":{"status":"active"},"meta":{"latest_release":"2026-07-03","license_spdx":null,"license_treatment":"permissive","name":"pycapnp","python_support":"supports_current","summary":"A cython wrapping of the C++ Cap'n Proto library"},"popularity":{"monthly_downloads":1719080,"position":3620,"tier":"top_5000"},"security":{"n_vulnerabilities":0},"version":"2.2.4"}