# ProofSlip

> Use this tool when you need to ensure the integrity and consistency of multi-agent workflows by verifying task completions and preventing duplicate actions. ProofSlip issues ephemeral receipts that downstream agents can check before proceeding, solving problems like stale approvals and unsafe retries. It takes in task completion notifications as input and outputs verifiable receipts that automatically expire after 24 hours.

Canonical page: https://skillsregistry.net/skills/proofslip  
JSON: https://api.skillsregistry.net/v1/skills/proofslip

## Description

ProofSlip issues 24-hour ephemeral receipts that AI agents check before executing actions. When one agent completes a task — payment, approval, or handshake — it creates a proof receipt; downstream agents verify that receipt before proceeding, preventing duplicate actions, stale approvals, and unsafe retries. Receipts automatically expire after 24 hours, eliminating stale state in multi-agent pipelines.

## Trust

- **Trust score (0–1):** 0.50
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** devops-ci
- **Updated:** 2026-04-25

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/proofslip)
- **Repository:** <https://github.com/johnny-z13/proofslip/tree/HEAD/packages/mcp-server>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "proofslip"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/proofslip` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/proofslip/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt