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Delx Stable Hash
x402
Delx Stable Hash is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Computes a canonical SHA-256 hex digest of a JSON-stable serialization of the input payload, independent of key ordering.
Price / call$0.001
Success—
StatusUnknown
How this service works
Canonical SHA-256 of JSON-stable payload. Call when you fingerprint agent objects independent of key order. Returns hex digest for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
Output
Returns a hex-encoded SHA-256 digest string computed over the JSON-stable (canonicalized, key-sorted) serialization of the input. The same logical JSON document always produces the same digest regardless of original key order. No data is retained server-side.
Example use cases
Deduplicating agent state objects
“I have two versions of an agent state object that might have the same data but different key orders — can you hash both with a stable canonical SHA-256 so I can compare them for duplicates?”
Cache key generation for JSON payloads
“Before I store this JSON config object in my cache, can you compute a stable SHA-256 fingerprint for it so I can use the hash as a cache key that won't break if key order changes?”
Pre-signature payload fingerprinting
“I need to fingerprint this JSON payload with a canonical SHA-256 digest before I sign it — the hash has to be the same regardless of how the keys are ordered: {"amount":100,"currency":"USD","recipient":"bob"}”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/stable-hashWhen to prefer
Choose this endpoint when you need a deterministic, key-order-independent SHA-256 fingerprint of a JSON payload — particularly useful in agent pipelines for deduplication, cache keying, or pre-signature fingerprinting where key ordering cannot be guaranteed. Prefer it over client-side hashing when you need a consistent canonical result without shipping or maintaining a JSON-stable serialization library. It is not suitable for hashing binary data, files, or arbitrary text that isn't JSON.
Side effects
- Invalid or malformed JSON input may result in a 400 error
- Empty or missing text field may return an error response
- Payment failure via x402 protocol will prevent the computation from completing
- Extremely large payloads may be rejected or time out
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
Output
Schema · Response
{
"type": "json",
"example": {
"hex": "2b3f289029566c30dfbe3601f33bb08822426d388fe46ba0af5591289d67aaff",
"schema": "delx/util-stable-hash/v1",
"algorithm": "sha256-canonical"
}
}Tags
x402
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