# StillOS Notary — Claim Hash Commit

> StillOS Notary — Claim Hash Commit is a paid API for AI agents from nolawealthfinancial.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Commits a claim hash to a tamper-evident ledger and returns an Ed25519-signed receipt proving the claim existed at a specific time

## Facts

- Endpoint: POST https://nolawealthfinancial.com/notary/commit
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stillos-notary-claim-hash-commit-6ad3f947
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1V_9AndYEjRGRbw_wlH_2

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 stillos-notary-claim-hash-commit-6ad3f947 -d '<json body>'
```

Example prompt: I need to notarize this claim hash — sha256:3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4 — using StillOS Notary so I have a tamper-evident, Ed25519-signed receipt proving it existed right now.

## When to prefer this

Use this endpoint when you need a lightweight, low-cost ($0.1 USDC) cryptographic proof-of-existence for a claim or document hash, backed by an Ed25519 signature, without requiring a full blockchain transaction. Ideal for audit trails, legal timestamping, content authenticity, and compliance scenarios where tamper-evidence is required but on-chain gas costs are prohibitive.

## Known failure modes

- Invalid or malformed hash format — returns 400 with validation error
- Payment not received or insufficient USDC — returns 402 Payment Required
- Hash already committed (duplicate submission) — may return conflict or deduplicated receipt
- Service temporarily unavailable — returns 503
- Signature generation failure — returns 500 with error detail

## How this service works

StillOS Notary — commit a claim hash (tamper-evident, Ed25519-signed receipt)

## Output

An Ed25519-signed receipt containing the committed claim hash, a server-side timestamp, and a cryptographic signature that allows any party to independently verify the commitment was recorded at that specific moment without tampering.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stillos-notary-claim-hash-commit-6ad3f947/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nolawealthfinancial.com](https://www.zero.xyz/host/nolawealthfinancial.com/llms.txt)