# Delx Record Fingerprint

> Delx Record Fingerprint is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Generates a deterministic SHA-256 fingerprint from a canonical JSON record for use as a preflight or analysis step in enterprise agent workflows.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/record-fingerprint
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-record-fingerprint-8393286f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gyCoEiZMYTk5CWtVqU8gX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-record-fingerprint-8393286f -d '<json body>'
```

Example prompt: Generate a stable SHA-256 fingerprint for this JSON record so I can detect if it changes between pipeline steps: {"userId":"abc123","role":"admin","permissions":["read","write"]}.

## When to prefer this

Choose this endpoint when you need a fast, stateless, deterministic SHA-256 fingerprint of a JSON record with no data retention — ideal for preflight deduplication, cache key generation, tamper detection, or audit logging inside enterprise agent workflows. Prefer it over general-purpose hashing libraries when you need a pay-per-call, infrastructure-free solution that integrates directly into an agent pipeline via x402.

## Known failure modes

- Empty or null record object causes validation error
- Non-serializable or circular JSON object may fail canonicalization
- Malformed input schema returns a 4xx error
- Upstream payment failure (x402) blocks execution and returns payment-required error

## How this service works

Create a stable SHA-256 fingerprint from canonical JSON. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and production co…

## Output

Returns a machine-readable JSON object containing the deterministic SHA-256 fingerprint of the input record. The result is stateless and advisory — no data is retained after execution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "record": {
   "type": "object",
   "description": "Input field: record."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "delx/util-record-fingerprint/v1",
  "algorithm": "sha256",
  "fingerprint": "16e1f64597cd8012eca960a1f62715444c0999b8bd2ab48d479f544f05751c26",
  "canonicalization": "sorted JSON keys, compact separators, default string conversion"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-record-fingerprint-8393286f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)