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Halowerk JSON Repair
x402
Halowerk JSON Repair is a paid API for AI agents from tools.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Fixes common malformed JSON from LLM outputs and external systems, returning the parsed object and a detailed repair log
Price / call$0.001
Success—
StatusUnknown
How this service works
Repariert die typischen Fehler aus Sprachmodell-Ausgaben und Fremdsystemen: Markdown-Zaun, haengende Kommas, einfache Anfuehrungszeichen, unquotierte Schluessel, Kommentare, typografische Anfuehrungszeichen, unsichtbare Zeichen, fehlende Klammern, NaN und Infinity. Liefert das geparste Objekt und ein Protokoll jeder einzelnen Reparatur.
Output
Returns the successfully parsed JSON object along with a structured repair log listing each individual fix applied (e.g. 'removed trailing comma at position 42', 'replaced single quotes with double quotes'), enabling full auditability of what was changed.
Example use cases
Fix LLM-generated JSON before ingestion
“The language model returned this JSON but it has hanging commas and unquoted keys — can you repair it so I can parse it properly? Here's the raw output: {name: 'Bob', items: [1, 2, 3,], active: true}”
Sanitize third-party API response
“I'm getting JSON from a legacy system that uses single quotes, has JavaScript-style comments, and sometimes includes Infinity — can you clean it all up and tell me what was fixed? Here's the payload: {'count': Infinity, /* total */ 'items': ['x', 'y']}”
Recover broken JSON before database write
“Before I store this record, I need you to repair the JSON — it's got typographic curly quotes and a missing closing bracket. Please give me the fixed object and the full repair log so I can audit what changed: "{\"user\": \u201cCarla\u201d, \"active\": true"”
Technical details
Endpoint
POSThttps://tools.halowerk.com/v1/json/repair?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to reliably parse JSON that originated from LLM outputs or legacy systems and may contain any of the well-known LLM JSON failure modes: markdown fences, trailing commas, single quotes, unquoted keys, JS comments, typographic quotes, invisible characters, missing brackets, NaN, or Infinity. Prefer it over a plain JSON parser when you need an audit trail of exactly what was repaired.
Side effects
- JSON is too severely malformed to recover — returns error with description
- Input is not JSON-like at all (e.g. plain text or binary) — returns parse failure
- Nested or recursive structures beyond processing depth — may return partial result
- Network timeout on large payloads
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Der fehlerhafte JSON-Text |
Tags
x402
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