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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 serp-extract.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, incomplete structures) so multi-agent pipelines can process 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://serp-extract.agentdiet.dev/v1/llm-json-schema-healer)
Output
Returns a repaired, valid JSON object derived from the malformed input — with syntax errors corrected, markdown fences stripped, trailing commas removed, single quotes converted to double quotes, and truncated structures closed. The output is immediately parseable by standard JSON libraries.
Example use cases
Fix LLM output crashing pipeline
“My AI agent just returned this JSON and it's breaking my parser because of trailing commas and markdown backticks — can you clean it up and give me valid JSON back? Here's the raw output: ```{"items": ["apple", "banana",], "count": 2,}```”
Recover truncated JSON from timeout
“My LLM response got cut off mid-JSON and now I have an incomplete object. Can you repair this truncated JSON so it's parseable: {"user": "bob", "preferences": {"theme": "dark", "lang":”
Normalize single-quote JSON from agent
“I got JSON back with single quotes instead of double quotes and some extra commas — it won't parse with standard libraries. Fix this for me: {'product': 'widget', 'price': 9.99, 'tags': ['sale', 'new',]}”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/llm-json-schema-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent or LLM pipeline frequently receives malformed, truncated, or markdown-wrapped JSON that crashes downstream processing. It is especially useful when you cannot control the LLM output format directly and need a deterministic, cheap ($0.002/call) repair layer before schema validation or database ingestion. Prefer this over writing custom regex fixers or retrying the LLM call when speed and cost matter.
Side effects
- Input so severely truncated or corrupted that valid repair is impossible — returns error or best-effort partial result
- Input that is not JSON at all (plain text, binary) — may return an error indicating non-JSON input
- Ambiguous repairs where multiple valid completions exist — deterministic repair may choose one interpretation that differs from original intent
- Very large JSON strings may hit query parameter length limits via GET method
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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