toolpin — Claude Code MCP server: check other servers
toolpin reports whether another MCP server answered, what tools it advertised, and whether those definitions changed. Use it to inspect agent dependencies or investigate a server change.
claude mcp add --transport http toolpin https://toolpin.dev/mcpWhat toolpin does
Search the public registry with search_servers. For a specific server, get_server reports observed endpoint reachability, check times, repository activity, and recorded changes. get_server_tools returns the definitions the server advertised with hashes of specification-defined fields; get_server_changes lists definition changes and endpoints going down or coming back. Toolpin compares those fields daily.
watch_server monitors a server through your Toolpin account and emails you when it changes or stops responding. Reading requires no key; watch_server and a higher limit require a key in the Authorization: Bearer header. Tool descriptions are the server author’s claims, not claims verified by Toolpin. It provides no safety rating, so its results cannot establish that a tool is safe or does what its description says.
The service uses stateless Streamable HTTP. Add it to Claude Code with claude mcp add --transport http toolpin https://toolpin.dev/mcp; Codex, Cursor, GitHub Copilot, and Gemini CLI also have install configurations.
What it helps with
- find MCP servers in the public registry
- check whether a remote server endpoint responded
- inspect advertised tool definitions and their hashes
- track changes to a server’s tools or availability
- receive email when a monitored server changes or stops responding
Example prompts for the agent
- Find MCP servers for working with Git in the public registry.
- Check the advertised tools and recorded changes for MCP server
example-server. - Monitor MCP server
example-serverand email me about changes or outages.
How to install toolpin
Platform CLI: remote server
claude mcp add --transport http toolpin https://toolpin.dev/mcpPlatform CLI: remote server
codex mcp add toolpin --url https://toolpin.dev/mcpConfig file
{
"mcpServers": {
"toolpin": {
"url": "https://toolpin.dev/mcp"
}
}
}Config file
{
"servers": {
"toolpin": {
"type": "http",
"url": "https://toolpin.dev/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http toolpin https://toolpin.dev/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about toolpin
How do I install toolpin in Claude Code?
Run claude mcp add --transport http toolpin https://toolpin.dev/mcp.
What does toolpin do?
It reports observations about other MCP servers, including endpoint reachability, advertised tools, and recorded changes. You can also monitor a server and receive email alerts.
Does toolpin verify whether an MCP server is safe?
No. It reproduces descriptions and annotations published by the server; it does not verify those claims or provide a safety rating.
