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Penniless Data Utilities – JSON Repair
x402
Penniless Data Utilities – JSON Repair is a paid API for AI agents from penniless-json-repair.sjaman.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).
Repairs malformed, truncated, or syntactically broken JSON strings deterministically without calling any AI model
Price / call$0.001
Success—
StatusUnknown
How this service works
Paste malformed JSON from ChatGPT, Claude or any model and get it repaired in your browser. Fixes code fences, trailing commas, single quotes, unquoted keys, Python True/False/None, comments and truncated output — and names every repair it made. Free, no signup, nothing uploaded.
Output
Returns a JSON object with an `ok` boolean indicating success, an `applied` array listing the specific repair transformations used (e.g. 'fences', 'unquoted-keys', 'single-quotes'), and a `repaired` field containing the fully parsed, valid JSON object after repair.
Example use cases
Fix LLM JSON pipeline output
“The language model returned JSON wrapped in triple backticks with single quotes instead of double quotes and it keeps breaking my parser — can you repair it so I get a proper JSON object I can work with?”
Recover truncated API response
“My API call got cut off mid-response and the JSON is incomplete. Can you pass it to the JSON repair service and tell me what it was able to recover and what fixes it applied?”
Sanitize agent-generated config
“An agent wrote me a JSON config file but it used unquoted keys and trailing commas everywhere. Can you fix it deterministically so it passes JSON.parse without any AI guessing what the values should be?”
Technical details
Endpoint
POSThttps://penniless-json-repair.sjaman.workers.dev/repair/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair without invoking an AI model — ideal for production pipelines where reproducibility matters and LLM-based fixing would be overkill, expensive, or unpredictable. It is especially well-suited for fixing common LLM output artifacts like markdown code fences, single-quoted strings, and unquoted keys.
Side effects
- Input is so severely malformed or truncated that no valid structure can be recovered — returns ok: false
- Input is not JSON-like at all (e.g. plain prose) — repair cannot be applied
- Payment of 0.001 USDC via x402 not provided or rejected — returns 402 Payment Required
- Request body missing required 'input' field — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string | Malformed JSON text |
Output
Schema · Response
{
"type": "object"
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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