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MCP verified MIT Self-run

Mercari Jp Mcp

mcp-msr2903-mercari-jp-mcp · by msr2903

This is a Model Context Protocol (MCP) server that provides real time data from Japan’s Mercari (jp.mercari.com). It allows you to retrieve information about product and prices (more to come) to be analyzed by LLM.

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Install

$ agentstack add mcp-msr2903-mercari-jp-mcp

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

Verified badge

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Reliability & compatibility

✓ Security review passed
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○ stale · 1y ago

Declared compatibility

Claude CodeClaude DesktopCursorWindsurf

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

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How agent discovery & health will work →
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About

Demo

Requirements

  • Python 3.11 or higher
  • Dependencies as listed in pyproject.toml, including:
  • mcp
  • mercari
  • pydantic

Pre-setup

  1. uv

https://docs.astral.sh/uv/getting-started/installation/

  1. Microsoft C++ Build Tools (For Windows)

https://visualstudio.microsoft.com/visual-cpp-build-tools/

Setup

  1. Clone this repository:

``bash git clone https://github.com/msr2903/mercari-jp-mcp.git cd mercari-jp-mcp ``

  1. Create and activate a virtual environment and install dependencies:

``bash uv venv source .venv/bin/activate # On Windows: .venv\Scripts\activate uv pip install -e . ``

Usage

Development Mode

You can test the server with MCP Inspector by running:

uv run server.py

You can also test to input manually the query, exclude keywords, min and max price by running:

uv run check_server.py

This will start the server and allow you to test the available tools.

Integration with Claude for Desktop

To integrate this server with Claude for Desktop:

  1. Install Claude for Desktop to your local machine.
  2. Install VS Code to your local machine. Then run the following command to open the claude_desktop_config.json file:
  • MacOS: code ~/Library/Application\ Support/Claude/claude_desktop_config.json
  • Windows: code $env:AppData\Claude\claude_desktop_config.json
  1. Edit the Claude for Desktop config file, located at:
  • macOS:

``json { "mcpServers": { "mercari": { "command": "uv", "args": [ "--directory", "/ABSOLUTE/PATH/TO/PARENT/FOLDER/mercari-jp-mcp", "run", "server.py" ] } } } ``

  • Windows:

``json { "mcpServers": { "mercari": { "command": "uv", "args": [ "--directory", "C:\\ABSOLUTE\\PATH\\TO\\PARENT\\FOLDER\\mercari-jp-mcp", "run", "server.py" ] } } } ``

  • Note: You may need to put the full path to the uv executable in the command field. You can get this by running which uv on MacOS/Linux or where uv on Windows.
  1. Restart Claude for Desktop

Thanks

This work would not have been possible without amazing open source projects, including (but not limited to):

  • jlowin/fastmcp (https://github.com/jlowin/fastmcp)
  • marvinody/mercari (https://github.com/marvinody/mercari/)

Thank you to the authors of these projects for making them available to the community!

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

Reviews

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Versions

  • v0.1.0 Imported from the upstream source.

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