Back to Browse
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 2026-09-14).
Repairs malformed, truncated, or syntactically broken JSON strings deterministically without calling any AI model
Price / call$0.001
Success—
StatusUnknown
How this service works
Deterministic, dependency-free data utilities served over x402 micropayments (USDC on Base). None of these call another AI model. Keyword: JSON repair Keyword: malformed JSON Keyword: broken JSON from LLM Keyword: fix JSON output Keyword: JSON sanitizer Keyword: truncated JSON recovery Keyword: YAML to JSON Keyword: convert YAML Keyword: parse YAML config Keyword: cron next run Keyword: cron parser Keyword: when does cron run next Keyword: unified diff Keyword: line diff Keyword: text diff Keyword: HTML to text Keyword: extract links Keyword: extract emails Keyword: scrape text Keyword: whois lookup Keyword: domain registration Keyword: registrar Keyword: domain expiry date Keyword: RDAP Keyword: dns lookup Keyword: MX records Keyword: TXT records Keyword: A record Keyword: DNS over HTTPS Keyword: github repo stats Keyword: github stars Keyword: repository popularity Keyword: OSS project metadata Keyword: email validation Keyword: verify email address Keyword: check MX deliverability Keyword: email syntax Use case: repair a JSON code block wrapped in Markdown fences Use case: turn a docker-compose or CI YAML file into JSON Use case: compute the next UTC fire time of a cron expression Use case: produce a unified diff between two versions of a file Use case: strip HTML tags and pull out links, emails, and headings Use case: look up a domain's registrar, status and expiry before purchase Use case: check when a domain registration lapses Use case: resolve A, AAAA, MX, TXT or NS records for a hostname Use case: find a domain's mail servers and SPF TXT record Use case: compare GitHub repository stars, forks and activity for market research Use case: check whether an email address is well-formed and its domain accepts mail
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/jsonWhen 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 | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"applied": [
"fences",
"unquoted-keys",
"single-quotes"
],
"repaired": {
"foo": "bar"
}
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"