# Compose HTTP byte-range bodies

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 exact inert single-range or multipart/byteranges 206 bodies, or an empty 416 artifact, from supplied nonempty Base64 bytes and a strict Range field. Byte-preserving order, offsets, fields and SHA-256; no conditional-request checks or transmission.

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

## Choose for
- Create bounded partial-content test artifacts from inline bytes without decoding or contacting a server

## Outside this profile
- No remote fetching, request transmission, filesystem access, caching, content decoding or authenticity verification
- No server policy, method, conditional request or If-Range enforcement; callers must check applicability separately
- Not a full HTTP parser: unsupported units, empty list members, inner whitespace and numbers over 20 digits are rejected by this bounded profile
- Empty representations, media-type parameters, automatic boundary generation or boundary tokens appearing anywhere in selected payloads

Proposed nominal USD 0.006 per successful call; payer fees excluded. No verified runtime availability.

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