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HISTOR — MCP tool-definition transparency log MCP Server

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

HISTOR — MCP tool-definition transparency log scores 66 (Good), licensed MIT and written in Python. It installs as a local process. It does not declare tools yet. Filed under Security. GitHub shows 1 stars. Install configs are generated for 10 clients. Being listed in the registry is not the same as being vendor-official.

by alexar76MITPython1 stars
InstallView on GitHub
Trust score
66Good
Trust score 66 of 100, Good

Good trust

66 of 100 from six public signals. Nobody can buy a point.

  • Listed in the official MCP registry.
  • OSI-style license: mit.
How we score trust
Scorecard

License, quality and maintenance

How grades work
Trust breakdown

Where the 66 comes from

22 + 20 + 1 + 10 + 10 + 3 = 66. Each factor is capped, so no single signal can carry a listing.

Registry22 / 30

Active in the official MCP registry, plus a known vendor namespace.

Registry: 22 of 30 points.
Maintenance20 / 20

How recently the repository saw a commit or release.

Maintenance: 20 of 20 points.
Popularity1 / 20

GitHub stars and weekly downloads, on a log scale.

Popularity: 1 of 20 points.
License10 / 10

A clear, OSI-style open-source license.

License: 10 of 10 points.
Security10 / 10

Not archived, a secure install path, a pinned version.

Security: 10 of 10 points.
Docs3 / 10

A real summary, a README with depth, listed tools.

Docs: 3 of 10 points.

Install

Pick your client, copy the config, paste it in.

Add to Cursor: HISTOR — MCP tool-definition transparency logInstall in VS Code: HISTOR — MCP tool-definition transparency logInstall in VS Code Insiders: HISTOR — MCP tool-definition transparency log

Needs Cursor or VS Code installed on this device. The button opens the app and asks you to confirm before it adds the server.

~/Library/Application Support/Claude/claude_desktop_config.json
{  "mcpServers": {    "alexar76-histor": {      "command": "uvx",      "args": [        "aimarket-histor"      ],      "env": {        "HISTOR_MCP_REMOTE": ""      }    }  }}
Install guide

Environment variables

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

Tools

All capabilities

Tools show up when the registry metadata or the repository README lists them. Public READMEs are read directly. A GitHub token is used only when one is already configured.

About

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

Frequently asked questions

What is HISTOR — MCP tool-definition transparency log MCP Server?

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

How do I install HISTOR — MCP tool-definition transparency log MCP Server in Claude Desktop, Cursor, or VS Code?

Pick your client in the Install section on this page and copy the generated config into the client's config file. Step-by-step guides: Claude Desktop, Cursor, and VS Code. HISTOR — MCP tool-definition transparency log MCP Server runs locally from the PyPI package aimarket-histor with the command uvx aimarket-histor.

Is HISTOR — MCP tool-definition transparency log MCP Server free and open source?

Yes. HISTOR — MCP tool-definition transparency log MCP Server is released under the MIT license, an OSI-approved open-source license, so you can use, modify, and self-host it under those terms.

Does HISTOR — MCP tool-definition transparency log MCP Server support remote (HTTP) connections?

No remote endpoint is listed for HISTOR — MCP tool-definition transparency log MCP Server. It runs locally on your machine over stdio, started by your MCP client.

How is HISTOR — MCP tool-definition transparency log MCP Server's trust score calculated?

HISTOR — MCP tool-definition transparency log MCP Server scores 66 out of 100 (Good). The score adds six capped public signals: registry status, maintenance, popularity, license, documentation, and security. Nobody can pay for points. Read the methodology for the full formula.

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