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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 json-repair.agentdiet.dev, 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://json-repair.agentdiet.dev/v1/json-validator)
Output
Returns a repaired, valid JSON object derived from the malformed input. The response includes the corrected JSON with all syntax errors resolved — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed — ready for downstream parsing without crashes.
Example use cases
Fix LLM output in agent pipeline
“My AI agent returned this malformed JSON with a trailing comma and it's crashing my pipeline: {"status": "ok", "items": [1, 2, 3,]} — can you repair it so it's valid?”
Strip markdown fences from JSON response
“The language model wrapped its JSON in triple backticks and now I can't parse it — here's the raw output: ```json
{"result": "success"}
``` — please clean it up and give me valid JSON.”
Repair single-quoted JSON from legacy tool
“I got this JSON string back from an older tool that used single quotes instead of double quotes: {'user': 'bob', 'score': 42} — can you fix it to proper JSON format?”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/json-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent or LLM pipeline receives unpredictable JSON output that may contain syntax errors such as trailing commas, single quotes, markdown code fences, or truncation artifacts. It is especially valuable as a deterministic, rule-based repair layer before passing LLM responses to a JSON parser, avoiding pipeline crashes without needing another LLM call to fix formatting.
Side effects
- Input is not recoverable JSON at all (random binary or plain text) — returns error or empty result
- Severely truncated input may lose data during repair
- Ambiguous structures may be repaired in an unexpected way
- Missing required raw_json parameter returns a 400/422 error
- Payment not completed (x402) returns a 402 Payment Required response
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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