MCP Toolsearch Proxy

MCP Toolsearch Proxy is an MCP server that handles large tool catalogs by exposing a small proxy interface to reduce token costs.

mcp-toolsearch-proxy lets a model use hundreds or thousands of MCP tools without loading them all at once. It sits in front of an upstream MCP server and presents a streamlined set of five tools for searching, describing, and calling upstream capabilities. The proxy combines BM25 lexical matching and a built-in multilingual embedding model to find relevant tools by keyword or meaning. It validates tool arguments against input schemas before sending calls upstream, and passes caller authorization headers transparently. It supports streamable HTTP transport as well as standard input and output.

MCP Toolsearch Proxy at a glance

Best for: Software engineer
Runs on: macOS, Linux, API, CLI, self-hosted, open source
Pricing: Free
Released: November 2026
Category: AI coding tool
Website: github.com/datolabs-io/mcp-toolsearch-proxy

Key features

Search tools using queries in over one hundred languages
Describe full input schemas for selected tools
Call read-only tools individually or in parallel batches
Execute write tools separately for explicit approval
Validate arguments against input schemas before upstream calls
Combine BM25 and multilingual embeddings for hybrid search
Support streamable HTTP and stdio transports

Use it for

Managing large catalogs of MCP tools with low token overhead
Running multi-language searches across tool descriptions
Enforcing read-only permissions on specific tool calls
Validating model-generated arguments before execution

Alternatives to MCP Toolsearch Proxy

MCP Proxy — It enables communication between remote SSE servers and stdio-based MCP clients.
mcp-router — Reduces Claude Code tokens by 13% to 44% using tool search and JSON shaping
MCPgraphy — Learns from agent calls to prevent invalid tool execution.
Coding Tools MCP — Turns any chat app into a coding agent with strict workspace safety boundaries.
MCP.so — Browse curated servers and clients for Claude, Cursor, and other AI tools.
MCP Inspector — Test and debug MCP servers via web, CLI, and terminal interfaces.
MCP Context Forge — Federates MCP and REST services into a single clean endpoint.
MCP Server Finder — It provides a comprehensive directory with detailed profiles and compatibility matrices.
MCP Extensions — Enables developers to build plugins that integrate natively with ChatGPT.
MCPX — Monetize Model Context Protocol servers and build AI agent tools.
Awesome Remote MCP Servers — Browse thousands of hosted endpoints without local installation.
MCP Market — Finds MCP servers that connect Claude and Cursor to developer tools.

All MCP Toolsearch Proxy alternatives