Free MCP tools
Small, free, no-signup tools for MCP configuration and protocol work. Each runs entirely in your browser — paste a config or payload, get an answer, nothing leaves your machine.
Config generator
Pick one or more servers from the directory and get a single merged config in the exact shape your client needs.
Open toolConfig validator
Paste your mcpServers JSON; catch the silent errors clients fail on (trailing commas, smart quotes, bad nesting) and format it.
Open toolConfig converter
Move a config between Claude Desktop, Cursor and Windsurf — remote-transport differences rewritten automatically.
Open toolConfig doctor
Paste a config and check it against the tool budget and quality signals — before the agent starts misbehaving.
Open toolMCP config redactor
Create a share-safe config while preserving the structure another person needs to debug it.
Open toolMCP config diff
Compare two configs structurally and export the added, removed, and changed paths.
Open toolJSON-RPC log analyzer
Summarize methods, errors, successes, and unmatched request IDs from pasted traffic.
Open toolTool schema token estimator
Measure a tools/list payload and find the definitions consuming the most context.
Open toolMCP config merger
Combine up to five configs without silently overwriting duplicate server names.
Open tool