# Typed MessagePack composer

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Compose stable MessagePack bytes from typed integers, text, binary, arrays and restricted-key maps; exact uint64/int64, encode only.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- A declared consumer requires this specific binary format and exact integer/binary distinctions
- Create a bounded offline configuration or protocol fixture from supplied typed values

## Outside this profile
- Floating point, dates, timestamp/tag extensions, missing-value primitives, custom objects, streaming or arbitrary maps
- Decode or inspect MessagePack bytes; decoding is explicitly held
- A universal MessagePack canonical form
- Network transport, authentication, signatures, COSE/CWT/WebAuthn, consumer schema validation, or execution of decoded content

Proposed nominal USD 0.005 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/messagepack-compose.json)
- [Input schema](/reference/schemas/messagepack-compose.input.json)
- [Output schema](/reference/schemas/messagepack-compose.output.json)
- [Fixed example](/reference/examples/messagepack-compose.json)
- [Complete HTML reference](/discover/tools/messagepack-compose)