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MCP Config Explorer

AI Tools

Validate and explore Model Context Protocol server configuration JSON.

3
Servers
1
Env Vars
⚠️ Config contains placeholder secrets — replace before use
🔌
filesystem
Read/write local files and directories
File System
npx -y @modelcontextprotocol/server-filesystem /tmp
🔌
github
Access GitHub repos, issues, PRs, and code
Version Control
npx -y @modelcontextprotocol/server-github
GITHUB_PERSONAL_ACCESS_TOKEN=<your-token>
🔌
postgres
Query PostgreSQL databases with SQL
Database
npx -y @modelcontextprotocol/server-postgres postgresql://localhost/mydb
Known MCP Servers
filesystem
Read/write local files and directories
github
Access GitHub repos, issues, PRs, and code
postgres
Query PostgreSQL databases with SQL
sqlite
Query SQLite databases
brave-search
Web search using Brave Search API
slack
Read and post Slack messages
memory
Persistent key-value memory across sessions
puppeteer
Browser automation and web scraping
#mcp#model context protocol#claude mcp#mcp config

About MCP Config Explorer

Validate and explore Model Context Protocol server configuration JSON. MCP Config Explorer runs entirely in your browser — no installation, no uploads, and no data ever leaves your device.

Common use cases: validate mcp server configs before adding to claude desktop; audit mcp tool names and argument schemas; debug mcp configuration errors in ai agent setups. Whether you are debugging, prototyping, or building production code, having a fast and private tool for this task saves time compared to writing one-off scripts or using an online tool that logs your data.

Like every tool in Catalyst, this one is free forever, requires no login, and is safe to use with confidential data. All processing happens client-side via native browser APIs.

How to use MCP Config Explorer

  1. 1

    Open the tool

    Open MCP Config Explorer directly — no signup or installation required. The interactive interface loads instantly.

  2. 2

    Paste or enter your input

    Drop your data into the input area. The tool validates and processes your input live as you type or paste.

  3. 3

    Review the result

    The output updates instantly. If the tool has configuration options, adjust them and watch the result update.

  4. 4

    Copy or download

    Use the copy button to send the result to your clipboard. Nothing is saved between page loads, so closing the tab discards everything.

Frequently asked questions

Is any data sent to a server?
No. The tool runs entirely in your browser using native JavaScript and Web APIs. Nothing you paste or upload is transmitted, logged, or stored. You can verify this by disconnecting your network and seeing the tool continue to work.
Is this tool free to use?
Yes. It's completely free with no login, signup, API key, or usage limits. Catalyst is funded by ads and will remain free forever.
Does it work offline?
Once the page has loaded, yes. All processing happens locally in your browser, so you can use the tool on airplanes, trains, or in air-gapped environments.

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