SPR (Sealed Payment Record)

network.luca/spr-mcp · v0.2.0

Seal every payment your AI agent makes as a signed record, on your own machine, with your key.

Website Source code Set it up

Connect Runs on your machine

Terminal

claude mcp add spr-mcp -e SPR_AGENT_ID=<SPR_AGENT_ID> -e SPR_ENTITY=<SPR_ENTITY> -e SPR_DIR=<SPR_DIR> -e SPR_TIME_ZONE=<SPR_TIME_ZONE> -e SPR_BINDING=<SPR_BINDING> -- npx -y @luca-network/[email protected]

claude_desktop_config.json

{
  "mcpServers": {
    "spr-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@luca-network/[email protected]"
      ],
      "env": {
        "SPR_AGENT_ID": "<SPR_AGENT_ID>",
        "SPR_ENTITY": "<SPR_ENTITY>",
        "SPR_DIR": "<SPR_DIR>",
        "SPR_TIME_ZONE": "<SPR_TIME_ZONE>",
        "SPR_BINDING": "<SPR_BINDING>"
      }
    }
  }
}

~/.cursor/mcp.json

{
  "mcpServers": {
    "spr-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@luca-network/[email protected]"
      ],
      "env": {
        "SPR_AGENT_ID": "<SPR_AGENT_ID>",
        "SPR_ENTITY": "<SPR_ENTITY>",
        "SPR_DIR": "<SPR_DIR>",
        "SPR_TIME_ZONE": "<SPR_TIME_ZONE>",
        "SPR_BINDING": "<SPR_BINDING>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "spr-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@luca-network/[email protected]"
      ],
      "env": {
        "SPR_AGENT_ID": "<SPR_AGENT_ID>",
        "SPR_ENTITY": "<SPR_ENTITY>",
        "SPR_DIR": "<SPR_DIR>",
        "SPR_TIME_ZONE": "<SPR_TIME_ZONE>",
        "SPR_BINDING": "<SPR_BINDING>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

Name	Description
`SPR_AGENT_ID` Required	The agent's ID, such as agt_research
`SPR_ENTITY` Required	The company the agent pays for
`SPR_DIR` Optional	The book's folder (default ./spr-books); it holds the company's private key
`SPR_TIME_ZONE` Optional	The company's time zone for accounting dates (default UTC)
`SPR_BINDING` Optional	on, to return the nonce to sign with each x402 intent

Details

Package	`@luca-network/[email protected]` (NPM, stdio)
First published	3 Nov 2026
Last updated	3 Nov 2026
Registry name	`network.luca/spr-mcp`

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Live status

Local install

Installed and run on your own machine, so there is no public endpoint to check.

Pair it with live search

Agents that use SPR (Sealed Payment Record) often also need current facts. NestDaddy MCP gives your AI today's internet: web search, real-time breaking news and full page reading in one connector.

See NestDaddy MCP

For maintainers

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