x402broker JSON Repair & Schema Validator

x402

x402broker 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 malformed or truncated LLM JSON output (trailing commas, markdown fences, single quotes) and validates it against a schema so multi-agent pipelines stay crash-free.

Price / call$0.002

Seller volume →—

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/json-validator)

Output

Returns a repaired, schema-compliant JSON object with malformed syntax corrected — including removal of markdown fences, conversion of single quotes to double quotes, trailing comma removal, and completion of truncated structures. Suitable for direct use in downstream pipeline steps.

Example use cases

Fix LLM output before pipeline step

“My language model returned JSON wrapped in triple-backtick markdown fences with trailing commas — can you clean it up so it passes to the next agent without crashing?”

Validate agent-generated config JSON

“I have JSON that an agent generated for a config file but I'm not sure if it's valid — it might have single quotes instead of double quotes. Can you repair and validate it?”

Recover truncated JSON response

“The LLM response got cut off mid-JSON and now it's malformed — can you repair the truncated output and return whatever valid JSON you can recover from it?”

Technical details

Endpoint

GEThttps://x402broker.com/v1/json-validator?utm_source=zero.xyz

When to prefer

Choose this endpoint when your multi-agent or LLM pipeline is receiving JSON that fails to parse due to common LLM formatting quirks like markdown wrapping, trailing commas, or single-quoted keys. It is purpose-built for deterministic, low-latency JSON repair in automated pipelines rather than general-purpose text cleanup or schema generation.

Side effects

JSON too severely malformed to repair — returns error with description of unrecoverable structure
Input is not JSON-like at all — returns validation error
Schema mismatch after repair — returns repaired JSON alongside schema violation details
Empty or missing raw_json parameter — returns 400 bad request

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"
}

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