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ProofSlip

Official registry Productivity

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

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @proofslip/mcp-server
Claude Code 
claude mcp add proofslip -e 'PROOFSLIP_API_KEY=<your proofslip_api_key>' -e 'PROOFSLIP_BASE_URL=https://proofslip.ai' -- npx -y @proofslip/mcp-server@0.2.3
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "proofslip": {
            "command": "npx",
            "args": [
                "-y",
                "@proofslip/mcp-server@0.2.3"
            ],
            "env": {
                "PROOFSLIP_API_KEY": "<your proofslip_api_key>",
                "PROOFSLIP_BASE_URL": "https://proofslip.ai"
            }
        }
    }
}

Environment variables

  • PROOFSLIP_API_KEY required secret Your ProofSlip API key (get one free at proofslip.ai)
  • PROOFSLIP_BASE_URL API base URL (defaults to https://proofslip.ai)

Frequently asked questions

What is ProofSlip?

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

How do I install ProofSlip?

It runs on your machine. In Claude Code: claude mcp add proofslip -e 'PROOFSLIP_API_KEY=<your proofslip_api_key>' -e 'PROOFSLIP_BASE_URL=https://proofslip.ai' -- npx -y @proofslip/mcp-server@0.2.3. For other clients, paste the JSON configuration from this page into their MCP settings.

Does ProofSlip need an API key?

Yes. It expects PROOFSLIP_API_KEY, which you set in its configuration.

Is ProofSlip open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains ProofSlip?

It is published by Johnny-Z13. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.