# AOTrust Notarization & Evidence Server

> Cryptographic proof of existence for AI agents. x402 on Base or Solana, NEAR anchored. Free tier.

- name: link.aotrust/notary
- version: 2.4.0
- connection class: L0 (run_local_package)
- trust: 89/100
- quality: 81/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/link.aotrust%2Fnotary
- tools: https://api.protogrid.dev/v1/servers/link.aotrust%2Fnotary/tools

**Runs on your machine: something must execute the package.** Only local packages are published (npm, PyPI, OCI, …). The registry never executes them, so tools are unknown until you run it.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "notary": {
      "command": "uvx",
      "args": [
        "aotrust-protocol==2.4.0"
      ],
      "env": {
        "AOTRUST_BASE_URL": "https://api.aotrust.link/v1"
      }
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: n/a
- freshness: 100
- provenance: 75
- drivers: +repository +dns-namespace ~liveness-unmeasured +updated-1d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 81/100 (good)

### protocol: n/a (weight 25)

- n/a `protocol.modern`, `protocol.stateless`, `protocol.transport`, `protocol.list_ttl`: no remote answered a protocol handshake (not probed yet, unreachable, or local-only)

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: notary_quote (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); notary_notarize (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); notary_verify (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 714 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: dependencies not resolved yet

- tools: 5, about 714 tokens to load them all
- tool set hash: 825efa3ee4dbfe7e92af9ea4001297e6
- badge: [![protogrid quality](https://protogrid.dev/badge/link.aotrust/notary.svg)](https://protogrid.dev/servers/link.aotrust/notary)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Dependencies

- pypi aotrust-protocol@2.4.0: pending

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

_none_

## Packages

- pypi aotrust-protocol@2.4.0

## Tools (5)

- `notary_free`: Create a free cryptographic proof of existence (PDR) for a digital artifact without payment. Dual mode: pass work_hash (Mode A, client-computed SHA-256 hex) OR content (Mode B, raw text/code ≤60KB — server hashes it, zero retention). Subject to rate limits (5/IP/day, 1000/day global). Returns shield_id, pdr_b64, and verify_url. For on-chain settlement proof, use notary_notarize_paid ($0.01 USDC on Base).
- `notary_notarize`: Submit a work artifact for on-chain notarisation (NEAR_DIRECT payment path). PREREQUISITE: Send the NEAR amount from notary_quote to the sink account, then provide the resulting tx_hash here. The server verifies the on-chain payment and submits the notarisation. Returns job_id — use notary_verify to poll for the signed PDR. Step 3 of the notarisation flow: quote -> pay -> notarize -> verify.
- `notary_notarize_paid`: Notarize a work hash on AOTrust (mainnet NEAR + Base USDC receipt). $0.01 USDC via x402-over-MCP: call without payment to receive PaymentRequired; retry with params._meta['x402/payment'] = signed PaymentPayload (EIP-3009, scheme exact, eip155:8453). HTTP clients: POST /notarize with x-payment header.
- `notary_quote`: Request a notarisation quote for a work artifact. Returns the cost ($0.01 USDC or NEAR equivalent), a quote_id valid for 600 seconds, the sink account to send payment to, and the PDR schema version. Step 1 of the notarisation flow: quote -> pay -> notarize -> verify.
- `notary_verify`: Verify a notarisation by job_id. Returns status (pending/anchored/error). If anchored, returns the full PDR record (base64, 239 bytes) with Ed25519 signature verification. Step 4 of the notarisation flow: quote -> pay -> notarize -> verify. Can be polled repeatedly until status changes from 'pending' to 'anchored'.