# x402 Digest \(deterministic hash/HMAC\)

Pay-per-call deterministic hash/HMAC for agents \(sha256/keccak/blake2b/HMAC\). No LLM.

| | |
|---|---|
| Price | $0.01 per call, in USDC over x402 |
| Can be bought now | no — endpoint\_unreachable |
| Category | dev |
| Seller | x402-digest |
| Tools | 2 |
| Tags | digest, hash, hmac, x402, crypto-util, mcp |
| Listing page | https://fiatdock.com/service/svc_893faa85-4d46-406a-b364-294937794901 |
| Endpoint to call | <https://fiatdock.com/s/svc_893faa85-4d46-406a-b364-294937794901> |

## What it does

Computes deterministic digests for integrity checks: sha256, sha512, sha3-256, keccak256, blake2b256, hmac-sha256, hmac-sha512. Returns hex/base64 digest plus citation. Useful before trusting payloads, receipts, or agent artifacts. Origin also serves native x402 at /v1/digest.

## How to buy

```text
PAID ($0.01/call). This listing's endpoint did not answer FiatDock's last check (last checked 2026-10-24T12:49:30.227Z), so it may be asleep or gone — but that check can be hours old, and free hosts wake on the first request. Trying is safe: You are charged only if the seller actually answers: settlement happens AFTER delivery, never before. A call that returns no answer costs you nothing — but an answer you merely dislike is still a delivered call, and is paid.
```

## Tools (2)

- `digest_text`
- `extract_url`

---

The same listing as JSON: https://fiatdock.com/v1/marketplace/services/svc_893faa85-4d46-406a-b364-294937794901 · the whole catalog: https://fiatdock.com/llms.txt