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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 2026-10-21).
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/malformed-json-healer)
Output
A repaired, syntactically valid JSON object with all common malformations corrected — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed — ready for immediate programmatic use.
Example use cases
Fix LLM pipeline JSON crashes
“The language model just returned this broken JSON with trailing commas and it's crashing my pipeline — repair it so I can continue processing: {"results": ["item1", "item2",], "count": 2,}”
Strip markdown fences from agent output
“My coding agent wrapped its JSON response in triple-backtick markdown fences and now I can't parse it — can you clean it up and return valid JSON? Here's the raw output: ```json
{"status": "ok", "data": {"value": 42}}
```”
Repair single-quoted JSON from scraper
“I've got a JSON-like string from a web scraper that uses single quotes instead of double quotes and it won't parse — fix it into proper JSON: {'user': 'bob', 'active': true, 'score': 98}”
Technical details
Endpoint
GEThttps://x402broker.com/v1/malformed-json-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair rather than probabilistic LLM-based re-generation — ideal for multi-agent pipelines where reliability and consistency matter. Best when the input is recognizably JSON-like but syntactically broken due to common LLM output artifacts (trailing commas, markdown wrapping, single quotes, truncation). Prefer alternatives if you need semantic correction or schema coercion beyond syntactic repair.
Side effects
- JSON is so severely truncated or corrupted that it cannot be deterministically repaired, returning an error
- Input that is not JSON-like at all (plain text, binary) may fail with a parse error
- Edge cases in deeply nested truncated structures may produce structurally valid but semantically incorrect repairs
- Network timeout or upstream service unavailability returns a 5xx error
- Missing required raw_json parameter returns a 400 validation 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"
}Reviews
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