# Cap'n Proto Encoding (Wire Format)

**Canonical:** https://apis.io/apis/capn-proto/capn-proto-encoding/  
**Provider:** Cap'n Proto — https://apis.io/providers/capn-proto/  
**Documentation:** https://capnproto.org/encoding.html

Cap'n Proto Encoding (Wire Format) is one of 5 APIs that [Cap'n Proto](https://apis.io/providers/capn-proto/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Binary Format, Specification, and Zero-Copy.

The Cap'n Proto encoding specification defines the binary wire format. The in-memory layout is the wire format, enabling zero-copy reads and writes, random field access, and safe memory-mapped access to messages stored on disk.

## Machine-readable artifacts (1)

- **Specification** — https://capnproto.org/encoding.html

## Other Cap'n Proto APIs (4)

- [Cap'n Proto Schema Language](https://apis.io/apis/capn-proto/capn-proto-schema-language/)
- [Cap'n Proto RPC Protocol](https://apis.io/apis/capn-proto/capn-proto-rpc/)
- [Cap'n Proto C++ Reference Implementation](https://apis.io/apis/capn-proto/capn-proto-cpp-runtime/)
- [Cap'n Proto Language Bindings](https://apis.io/apis/capn-proto/capn-proto-language-bindings/)

## Tags

Binary Format, Specification, Zero-Copy

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/capn-proto/capn-proto-encoding/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/capn-proto/.