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com.pcrzero/mcp

Official registry Security

Issue signed receipts for AI agent actions; verify any receipt offline - free, no account.

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).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http com-pcrzero-mcp 'https://mcp.pcrzero.com/mcp' --header 'Authorization: <Bearer ak_live_… / ak_test_…. Required only for issue_receipt. verify_receipt and get_keyset work without it.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "com-pcrzero-mcp": {
            "type": "http",
            "url": "https://mcp.pcrzero.com/mcp",
            "headers": {
                "Authorization": "<Bearer ak_live_… / ak_test_…. Required only for issue_receipt. verify_receipt and get_keyset work without it.>"
            }
        }
    }
}
NPM package @scytalex-llc/pcrzero-mcp
Claude Code 
claude mcp add com-pcrzero-mcp -e 'PCRZERO_API_KEY=<your pcrzero_api_key>' -- npx -y @scytalex-llc/pcrzero-mcp@0.2.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "com-pcrzero-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@scytalex-llc/pcrzero-mcp@0.2.0"
            ],
            "env": {
                "PCRZERO_API_KEY": "<your pcrzero_api_key>"
            }
        }
    }
}

Environment variables

  • PCRZERO_API_KEY secret PCRZERO API key (ak_live_… / ak_test_…). Optional for stdio free tools; required for issue_receipt. In streamable-http client_key mode, prefer per-request Authorization header instead.
NPM package @scytalex-llc/pcrzero-mcp
Claude Code 
claude mcp add com-pcrzero-mcp -e 'PCRZERO_MCP_TRANSPORT=<PCRZERO_MCP_TRANSPORT>' -e 'PCRZERO_MCP_AUTH_MODE=<PCRZERO_MCP_AUTH_MODE>' -e 'PCRZERO_API_KEY=<your pcrzero_api_key>' -- npx -y @scytalex-llc/pcrzero-mcp@0.2.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "com-pcrzero-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@scytalex-llc/pcrzero-mcp@0.2.0"
            ],
            "env": {
                "PCRZERO_MCP_TRANSPORT": "<PCRZERO_MCP_TRANSPORT>",
                "PCRZERO_MCP_AUTH_MODE": "<PCRZERO_MCP_AUTH_MODE>",
                "PCRZERO_API_KEY": "<your pcrzero_api_key>"
            }
        }
    }
}

Environment variables

  • PCRZERO_MCP_TRANSPORT Set to http to enable streamable-http transport (default stdio).
  • PCRZERO_MCP_AUTH_MODE HTTP auth mode: client_key (default, per-request API key header — required for remote/Bazaar) or env_key (loopback sidecar only).
  • PCRZERO_API_KEY secret Optional process env API key for env_key (loopback) mode only. Never used as a shared multi-client key in client_key mode. issue_receipt always requires a key.

Frequently asked questions

What is com.pcrzero/mcp?

Issue signed receipts for AI agent actions; verify any receipt offline - free, no account.

How do I install com.pcrzero/mcp?

It runs as a remote server. In Claude Code: claude mcp add --transport http com-pcrzero-mcp 'https://mcp.pcrzero.com/mcp' --header 'Authorization: <Bearer ak_live_… / ak_test_…. Required only for issue_receipt. verify_receipt and get_keyset work without it.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does com.pcrzero/mcp need an API key?

Yes. It expects PCRZERO_API_KEY, Authorization, which you set in its configuration.

Is com.pcrzero/mcp open source?

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

Who maintains com.pcrzero/mcp?

It is published by Scytalex-LLC. 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.