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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 prompt-guard.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs malformed, truncated, or markdown-wrapped JSON strings from LLM outputs so multi-agent pipelines can parse them without crashing.
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://prompt-guard.agentdiet.dev/v1/malformed-json-healer)
Output
A repaired, valid JSON object reconstructed from the malformed input, with issues like trailing commas, markdown fences, single quotes, and truncation corrected so downstream parsers can consume it without errors.
Example use cases
LLM output JSON pipeline fix
“My AI agent just returned this JSON blob with trailing commas and markdown code fences and it's breaking my downstream parser — can you repair it so I get back valid JSON I can actually use?”
Single-quoted JSON from chat model
“The chatbot gave me JSON using single quotes instead of double quotes and it fails JSON.parse — can you fix it: {'user': 'bob', 'score': 99}?”
Truncated JSON recovery in automation
“My workflow automation got a JSON response that got cut off mid-string and now nothing parses — can you deterministically repair it and give me back something valid?”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/malformed-json-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that fails standard parsing due to common issues like trailing commas, markdown code fences, single quotes, or truncation — especially when you need a deterministic, rule-based fix rather than a probabilistic LLM re-generation of the JSON.
Side effects
- Input too severely truncated or corrupted to infer valid structure — returns error or best-effort partial repair
- Input is not JSON at all (plain text, binary) — may return error or empty result
- Schema validation failure if repaired JSON doesn't match an expected schema
- Network or payment (x402) errors preventing the request from completing
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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