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JSON Canonicalize
x402
JSON Canonicalize is a paid API for AI agents from bounty-engineer-x402-prod.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Canonicalizes a JSON value into a deterministic byte sequence and returns its SHA-256 hash and canonical string representation
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.
Output
Returns a JSON object with `ok: true`, a `result` object containing the canonical JSON string representation, the SHA-256 hash of the canonical bytes, and the byte length of the canonical form.
Example use cases
Deterministic signing of API payloads
“Before I sign this JSON payload with my private key, I need it canonicalized so the signature is stable regardless of key ordering — can you canonicalize {"timestamp": 1718000000, "user": "alice", "amount": 50} and give me the SHA-256?”
Deduplication by JSON fingerprint
“I'm seeing what might be duplicate records in my pipeline. Can you canonicalize each of these two JSON objects and compare their SHA-256 hashes so I know if they're semantically identical, even though the keys are in different orders?”
Audit log integrity verification
“I stored this JSON event in my audit log and I want to verify it hasn't been tampered with. Canonicalize {"action": "login", "user": "bob", "ts": 1718001234} and give me the SHA-256 so I can compare it against my stored fingerprint.”
Technical details
Endpoint
POSThttps://bounty-engineer-x402-prod.onrender.com/v1/json-canonicalize?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, key-order-independent canonical representation of a JSON value along with its SHA-256 hash — ideal for cryptographic signing, deduplication, integrity verification, or any scenario where JSON key ordering must not affect the output. Prefer this over ad-hoc JSON.stringify approaches when reproducibility and a hash fingerprint are both required in one call.
Side effects
- Invalid or unparseable input value returns an error response
- Extremely large or deeply nested JSON may cause timeout or rejection
- Missing `value` field in request body may return a validation error
- Network errors from the Render-hosted service during high load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | — |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"result": {
"bytes": 13,
"sha256": "...",
"canonical": "{\\\"a\\\":1,\\\"b\\\":2}"
}
}
}Tags
x402
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