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JSON Canonicalize
x402
JSON Canonicalize is a paid API for AI agents from x402-gateway-production-1f21.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Canonicalizes a JSON object into a deterministic, normalized form for consistent checksums and encoding.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.
Output
A deterministically serialized canonical JSON string where keys are sorted and formatting is normalized, suitable for hashing, signing, or comparison.
Example use cases
Stable hash for API payload signing
“I need to sign this JSON payload before sending it: {"userId":"abc123","amount":500,"currency":"USD"} — can you canonicalize it first so the hash is always the same regardless of key order?”
Deduplication of JSON records
“I have two JSON objects that might be the same data just in different key orders — canonicalize both of them so I can compare them as strings: {"b":2,"a":1} and {"a":1,"b":2}.”
Reproducible JSON for blockchain logging
“Before I write this config object to the blockchain, canonicalize it so the serialized form is always identical no matter what library generated it: {"version":"1.0","settings":{"retry":3,"timeout":30}}.”
Technical details
Endpoint
POSThttps://x402-gateway-production-1f21.up.railway.app/json/canonicalize?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, canonical representation of a JSON object for purposes such as content-addressable hashing, digital signatures, deduplication, or reproducible storage. Prefer this over ad-hoc serialization when key ordering consistency across different systems or libraries is critical.
Side effects
- Missing required 'input' field returns validation error
- Invalid body structure or missing 'value' field causes schema rejection
- Malformed JSON in body causes parse error
- Payment not included or insufficient USDC causes 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "ready"
}
}Tags
x402
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