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Deterministic A2A Broken-JSON Repair & Schema Validator
Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from x402broker.com, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-23).
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash
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/json-validator)
Output
Returns a repaired, valid JSON object with the malformed input corrected — trailing commas removed, single quotes converted to double quotes, markdown fences stripped, and truncated structures closed. The response is a JSON object containing the fixed output ready for downstream consumption.
Example use cases
Fixing LLM output in agent pipeline
“My AI agent just returned this JSON with trailing commas and single quotes and it's crashing my parser — can you repair it and give me back valid JSON? Here's the raw output: {'user': 'bob', 'score': 42,}”
Stripping markdown fences from JSON
“The model wrapped its JSON response in triple-backtick markdown fences and now my downstream tool can't parse it — can you strip the fences and fix any other issues so I get clean JSON back?”
Recovering truncated JSON from timeout
“My LLM call timed out mid-response and I got a truncated JSON string that cuts off halfway through — can you try to repair and complete it so I can still use the data?”
Technical details
Endpoint
POSThttps://x402broker.com/v1/json-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair rather than probabilistic LLM re-generation — ideal for production multi-agent pipelines where you need consistent, predictable fixes for common LLM output artifacts like trailing commas, single quotes, and markdown fences. Prefer this over asking another LLM to fix the JSON when you need low latency, low cost ($0.002/call), and reproducible behavior.
Side effects
- Input is so severely malformed it cannot be deterministically repaired — returns error with details
- Input string is empty or missing raw_json field — returns 400-level validation error
- JSON is structurally ambiguous after truncation with multiple valid repairs — may return best-guess result
- Payment not authorized via x402 — returns 402 Payment Required
- Network timeout on large inputs
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"
}Reviews
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