# ProofSlip (npm · @proofslip/mcp-server)

Receipt-based verification for AI agent workflows — create, verify, and poll ephemeral proof objects

- Trust score: 70/100 (medium)
- Change this week: +24
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@proofslip/mcp-server`: 70/100 (this document), [markdown](https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server.md), [page](https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@proofslip/mcp-server`
- Version: `0.2.3`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 119 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 477 tokens (~119/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add ai-proofslip-mcp-server -- npx -y @proofslip/mcp-server
```

### Codex

```bash
codex mcp add ai-proofslip-mcp-server -- npx -y @proofslip/mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-proofslip-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@proofslip/mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-proofslip-mcp-server --command npx --arg -y --arg @proofslip/mcp-server
```

### Hermes

```yaml
mcp_servers:
  ai-proofslip-mcp-server:
    command: "npx"
    args: ["-y", "@proofslip/mcp-server"]
```

### Other

```json
{
  "mcpServers": {
    "ai-proofslip-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@proofslip/mcp-server"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 70, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-08-02 (score 66, +45)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → excellent
- [functional] First check of Schema quality: unverified
- [functional] Licence: MIT

### 2026-07-31 (score 21, −25)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (4)

### `create_receipt` (~223 tokens)

Create a ProofSlip receipt to record that something happened. Use 'action' for completed events, 'approval' for decisions awaiting review, 'handshake' for agent-to-agent coordination, 'resume' for continuation bookmarks, 'failure' for structured error records. Returns a receipt_id and verify_url. Receipts expire after 24 hours by default.

Input parameters:

- `audience` (string): Set to "human" to enrich the verification page with social cards
- `expires_in` (number): TTL in seconds (60-86400, default 86400 = 24 hours)
- `idempotency_key` (string): Prevents duplicate receipts if you retry the same request
- `payload` (object): Optional structured JSON data (max 4KB)
- `ref` (object): Optional workflow reference IDs for tracing
- `status` (string, required): Freeform status string (e.g. "success", "pending", "failed")
- `summary` (string, required): Human-readable summary of what happened (max 280 chars)
- `type` (string, required): Receipt type

### `verify_receipt` (~85 tokens)

Verify a ProofSlip receipt and retrieve its full data (type, status, summary, payload, ref, expiry). Use this to check what happened before deciding what to do next. Returns the complete receipt if valid, or a not_found error if expired or missing. No API key required.

Input parameters:

- `receipt_id` (string, required): The receipt ID to verify (starts with rct_)

### `check_receipt_status` (~95 tokens)

Lightweight status poll for a ProofSlip receipt. Returns only status, is_terminal, and next_poll_after_seconds — no payload or summary. Use this instead of verify_receipt when you only need to know if a receipt state has changed. If is_terminal is false, wait next_poll_after_seconds before checking again. No API key required.

Input parameters:

- `receipt_id` (string, required): The receipt ID to check (starts with rct_)

### `signup` (~74 tokens)

Get a free ProofSlip API key. Returns the key directly — save it immediately, it cannot be retrieved later. Only needed once. After signup, configure the key as PROOFSLIP_API_KEY environment variable to use create_receipt. Free tier: 500 receipts per month.

Input parameters:

- `email` (string, required): Your email address

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server#diagnostics

## Score history

- 2026-08-03: 70
- 2026-08-02: 66
- 2026-08-01: 21
- 2026-07-31: 21
- 2026-07-30: 46
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/@proofslip/mcp-server
- Socket report: https://socket.dev/npm/package/@proofslip/mcp-server
- Repository: https://github.com/Johnny-Z13/proofslip
- Website: https://proofslip.ai/
- Changelog RSS feed: https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server/changelog.json
- HTML version of this page: https://verifymcp.io/servers/ai-proofslip-mcp-server/proofslip-mcp-server