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HISTOR — MCP tool-definition transparency log

io.github.alexar76/histor · v0.9.1

Check, diff and history of MCP tool definitions, from a public signed log of 88k+ servers.

Connect Runs on your machine

Terminal
claude mcp add histor -e HISTOR_MCP_REMOTE=<HISTOR_MCP_REMOTE> -- uvx aimarket-histor==0.9.1
claude_desktop_config.json
{
  "mcpServers": {
    "histor": {
      "command": "uvx",
      "args": [
        "aimarket-histor==0.9.1"
      ],
      "env": {
        "HISTOR_MCP_REMOTE": "<HISTOR_MCP_REMOTE>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "histor": {
      "command": "uvx",
      "args": [
        "aimarket-histor==0.9.1"
      ],
      "env": {
        "HISTOR_MCP_REMOTE": "<HISTOR_MCP_REMOTE>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "histor": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "aimarket-histor==0.9.1"
      ],
      "env": {
        "HISTOR_MCP_REMOTE": "<HISTOR_MCP_REMOTE>"
      }
    }
  }
}

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

NameDescription
HISTOR_MCP_REMOTE
Optional
Public HISTOR instance to query (default https://histor.modelmarket.dev). Pass --local to serve your own log from HISTOR_DATA_DIR instead.

Details

Package[email protected] (PYPI, stdio)
First published13 Nov 2026
Last updated13 Nov 2026
Registry nameio.github.alexar76/histor

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