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x402broker Structured Output JSON Repair & Schema Validator
x402
x402broker Structured Output JSON Repair & Schema Validator is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.002/call, status unknown (last checked 2026-10-20).
Repairs truncated or malformed LLM-generated JSON (trailing commas, markdown fences, single quotes) and validates it against a schema so multi-agent pipelines stay crash-free.
Price / call$0.002
Success—
StatusUnknown
How this service works
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash. (Live x402 v2, IETF MPP & MCP endpoint at https://x402broker.com/v1/structured-output)
Output
Returns a syntactically correct, fully parsed JSON object with common LLM-output errors fixed (trailing commas removed, markdown fences stripped, single quotes converted to double quotes, truncations repaired) and optionally validated against a provided schema.
Example use cases
Fix crashed multi-agent pipeline output
“My orchestrator agent got back a JSON blob from the sub-agent but it has single quotes instead of double quotes and a trailing comma — can you repair it so the next step in my pipeline doesn't blow up?”
Strip markdown fences from structured output
“The LLM wrapped its JSON response in triple backtick code fences again — please strip those out and return just the clean, parseable JSON object.”
Validate LLM response against expected schema
“I need to check that this JSON the model returned actually matches my expected schema before I pass it to my database layer — can you repair any syntax issues and confirm it validates?”
Technical details
Endpoint
GEThttps://x402broker.com/v1/structured-output?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent or LLM pipeline receives structured output that fails JSON.parse() due to common LLM formatting mistakes (trailing commas, markdown fences, single quotes, truncation). Ideal for any orchestration layer that needs deterministic, crash-proof JSON normalization before passing data downstream, especially when you cannot control the upstream LLM's output format.
Side effects
- Input JSON too corrupted to deterministically repair — returns error indicating unparseable input
- Schema mismatch after repair — returns validation failure with field-level details
- Missing required 'input' field in request body — returns 400 bad request
- Network timeout or service unavailability — returns 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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