# satledger timestamp receipt

> RFC 3161 timestamps with no account, and a signed agent-ledger workspace. Paid per call over x402.

- name: org.satledger/timestamp-receipt
- version: 0.21.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 79/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/org.satledger%2Ftimestamp-receipt
- tools: https://api.protogrid.dev/v1/servers/org.satledger%2Ftimestamp-receipt/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "timestamp-receipt": {
      "type": "http",
      "url": "https://api.satledger.org/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-0d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### 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: provision_workspace (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); top_up_workspace (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); timestamp_receipt (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 498 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`: 4 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`: no npm or PyPI package

- tools: 3, about 498 tokens to load them all
- tool set hash: 5ae1d967d150ee04d2a12791e4468041
- tools last changed: 2026-10-20T12:36:16.488Z
- badge: [![protogrid quality](https://protogrid.dev/badge/org.satledger/timestamp-receipt.svg)](https://protogrid.dev/servers/org.satledger/timestamp-receipt)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-20 `top_up_workspace` added
  - Add units to a workspace you already hold. Send its API key in _meta[satledger/api-key] and the payment in _meta[x402/payment]: 0.50 USDC for 2,500 units (starter), 15.00 USDC for 100,000 units (block). The units land in that workspace and nothing new is created; buying a workspace instead gives you an empty ledger under a different key.
- 2026-10-20 `provision_workspace` added
  - Buy a workspace: a tamper-evident usage and action ledger for your agents, every event ed25519-signed and hash-chained, with an export your own customers verify offline. Pay over x402 in _meta[x402/payment]: 0.50 USDC for 2,500 units (starter), 15.00 USDC for 100,000 units (block). Every workspace also carries 10,000 free units. Returns an API key once, plus the next calls to make. The ledger operations themselves are HTTP, authenticated with that key.
- 2026-10-20 `timestamp_receipt` changed (description)
  - before: Submit a SHA-256 digest and receive a Time-Stamp Authority's signed RFC 3161 token over it: evidence that the data you hashed existed at that time, verifiable against the authority without trusting or contacting this service. Hash your data yourself - it never leaves your side. 0.05 USDC for one, or 0.50 for up to 10 in a single call and a single payment, bound to one timestamp by a Merkle root. Paid over x402. No account, nothing stored here afterwards.
  - after: Submit a SHA-256 digest and receive a Time-Stamp Authority's signed RFC 3161 token over it: evidence that the data you hashed existed at that time, verifiable against the authority without trusting or contacting this service. Hash your data yourself - it never leaves your side. Your first 3 each day are free, no payment needed. Then 0.05 USDC for one, or 0.50 for up to 10 in a single call and a single payment, bound to one timestamp by a Merkle root. Paid over x402. No account, nothing stored here afterwards.
- 2026-10-19 `timestamp_receipt` changed (description, inputSchema)
  - before: Submit a SHA-256 digest and receive a Time-Stamp Authority's signed RFC 3161 token over it: evidence that the data you hashed existed at that time, verifiable against the authority without trusting or contacting this service. Hash your data yourself - it never leaves your side. Costs 0.05 USDC per call, paid over x402. No account, nothing stored here afterwards.
  - after: Submit a SHA-256 digest and receive a Time-Stamp Authority's signed RFC 3161 token over it: evidence that the data you hashed existed at that time, verifiable against the authority without trusting or contacting this service. Hash your data yourself - it never leaves your side. 0.05 USDC for one, or 0.50 for up to 10 in a single call and a single payment, bound to one timestamp by a Merkle root. Paid over x402. No account, nothing stored here afterwards.

Full history: https://api.protogrid.dev/v1/servers/org.satledger%2Ftimestamp-receipt/changes

## Remotes

- https://api.satledger.org/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (3)

- `provision_workspace`: Buy a workspace: a tamper-evident usage and action ledger for your agents, every event ed25519-signed and hash-chained, with an export your own customers verify offline. Pay over x402 in _meta[x402/payment]: 0.50 USDC for 2,500 units (starter), 15.00 USDC for 100,000 units (block). Every workspace also carries 10,000 free units. Returns an API key once, plus the next calls to make. The ledger operations themselves are HTTP, authenticated with that key.
- `timestamp_receipt`: Submit a SHA-256 digest and receive a Time-Stamp Authority's signed RFC 3161 token over it: evidence that the data you hashed existed at that time, verifiable against the authority without trusting or contacting this service. Hash your data yourself - it never leaves your side. Your first 3 each day are free, no payment needed. Then 0.05 USDC for one, or 0.50 for up to 10 in a single call and a single payment, bound to one timestamp by a Merkle root. Paid over x402. No account, nothing stored here afterwards.
- `top_up_workspace`: Add units to a workspace you already hold. Send its API key in _meta[satledger/api-key] and the payment in _meta[x402/payment]: 0.50 USDC for 2,500 units (starter), 15.00 USDC for 100,000 units (block). The units land in that workspace and nothing new is created; buying a workspace instead gives you an empty ledger under a different key.