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KEVAREMESH JSON Stable Canonicalize
x402
KEVAREMESH JSON Stable Canonicalize is a paid API for AI agents from kevaremesh-web.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-24).
Converts any JSON value into a deterministic, lexicographically-ordered canonical JSON string and returns its byte length and SHA-256 hash.
Price / call$0.001
Success—
StatusUnknown
How this service works
Buyer-first MCP procurement gateway that discovers, compares and routes live x402 APIs without making the buyer choose a provider.
Output
Returns a canonical JSON string with all object keys sorted in lexicographic UTF-16 order, arrays with preserved order, along with the byte length of the canonical output, the SHA-256 hex digest of that canonical string, and metadata including algorithm name and product identifier.
Example use cases
Sign a JSON payload deterministically
“I need to sign this JSON document and want a stable canonical form first — can you canonicalize {"userId":"abc123","amount":50,"currency":"USD"} so the key order is deterministic and give me the SHA-256 hash I can sign?”
Compare two JSON objects for equivalence
“Are these two JSON blobs logically identical? Canonicalize both {"z":9,"a":1} and {"a":1,"z":9} for me so I can compare their SHA-256 hashes.”
Generate reproducible JSON fingerprint
“I need a reproducible fingerprint of this nested JSON config {"host":"example.com","port":443,"tls":true} — give me the canonical JSON string and its SHA-256 so I can detect any future changes.”
Technical details
Endpoint
POSThttps://kevaremesh-web.vercel.app/api/x402/json-stable-canonicalize?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, reproducible canonical JSON string for cryptographic signing, content hashing, or equality comparison, and you want the output in the KEVAREMESH stable JSON v1 format (lexicographic UTF-16 key ordering). Note this is NOT RFC 8785/JCS-compliant, so prefer it for internal fingerprinting workflows rather than interoperability with JCS-mandating standards.
Side effects
- Invalid or malformed input that cannot be parsed as JSON returns an error
- Extremely deeply nested or circular-reference objects may fail or time out
- Network or payment gateway failures return HTTP 402 or 5xx errors
- Missing or invalid x402 payment header causes authentication failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | — |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"bytes": 13,
"sha256": "sha256_hex",
"algorithm": "kevaremesh-stable-json-v1",
"key_order": "lexicographic_utf16",
"canonical_json": "{\"a\":1,\"b\":2}",
"arrays_preserve_order": true
},
"product": "kevaremesh_json_stable_canonicalize_v2",
"service": "KEVAREMESH",
"tool_name": "kevaremesh_json_stable_canonicalize",
"limitations": [
"KEVAREMESH stable JSON v1; not advertised as RFC 8785/JCS"
],
"generated_at": "2026-09-18T00:00:00.000Z"
}
}Tags
x402
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