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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/malformed-json-healer)
Output
A repaired, valid JSON object derived from the submitted malformed or truncated input string, with all syntax errors corrected including trailing commas removed, markdown fences stripped, single quotes normalized to double quotes, and truncation completed where possible.
Example use cases
Fixing LLM pipeline JSON crashes
“My agent just got back a malformed JSON response from the model with trailing commas and it's crashing my pipeline — here's the raw string, can you repair it so it's valid JSON I can pass to the next step?”
Stripping markdown fences from model output
“The LLM wrapped its JSON output in triple-backtick markdown fences again and my parser is choking on it — can you strip the fences and fix any other issues so I get a clean parseable JSON object back?”
Recovering truncated JSON from a cut-off response
“The API response got cut off mid-JSON and now it's truncated and unparseable — here's what I got: '{"items": [{"id": 1, "name": "foo"' — can you repair and close it out into valid JSON?”
Technical details
Endpoint
POSThttps://x402broker.com/v1/malformed-json-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent or LLM pipeline is receiving JSON outputs that frequently contain syntax errors like trailing commas, markdown code fences, single-quoted keys, or truncated structures. It is ideal for hardening agentic pipelines that call LLMs directly and need a reliable repair step before downstream JSON parsing. Prefer it over manual regex fixes or ad-hoc parsing hacks when you need deterministic, repeatable repair behavior at low cost ($0.002/call).
Side effects
- Input so severely malformed that deterministic repair is impossible — returns error or best-effort partial output
- Ambiguous truncation with multiple valid completions — may return one interpretation without guaranteeing correctness
- Very large JSON strings may hit size limits
- Semantically invalid JSON (correct syntax but wrong schema) will be returned as-is without semantic correction
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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