# Strict JSON Artifact Extraction

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.

Extract exact JSON object/array candidates from caller-supplied text using explicit json-fence or balanced-container mode. Selects only one unambiguous valid candidate, rejects duplicate decoded keys and nonfinite numbers, and never repairs invalid JSON or executes content.

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

## Choose for
- Recover a strict JSON object from a model response with source-span evidence
- Reject ambiguous structured outputs instead of choosing the first JSON block

## Outside this profile
- JSON repair, JSON5, primitive JSON roots, schema validation or interpreting prose
- Guaranteed distinction between literal braces in prose and intended JSON in balanced mode

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

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