Tool Chainer MCP Server

Chains calls to other Model Context Protocol (MCP) tools, reducing token usage by enabling sequential tool execution with result passing.

Local serverstdio 59

What is the Tool Chainer MCP server?

Tool Chainer MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. Chains calls to other Model Context Protocol (MCP) tools, reducing token usage by enabling sequential tool execution with result passing.

What you get

  • Chain multiple MCP tools together in sequence
  • Pass results from one tool as input to another tool using CHAIN_RESULT placeholder
  • Filter and extract specific data using JsonPath with inputPath and outputPath parameters
  • Automatic tool discovery from configured MCP servers
  • Minimal token usage compared to individual tool calls

What the assistant can call

Once Tool Chainer is connected, these are the calls the assistant has available:

  • Prerequisites — The Prerequisites tool exposed by this server

Configuration and credentials

  • Node.js (v16 or later) * npm

Setting it up

directly on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.

Choosing this one

Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Tool Chainer's toolset — Prerequisites — is a fair guide to whether it matches your workflow. It is maintained by thirdstrandstudio; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Before you rely on it

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • MCP clients confirm each tool call by default. Leave that on until you have watched what the tool chainer mcp server does with a few real requests.

Available tools

ToolWhat it does
PrerequisitesThe Prerequisites tool exposed by this server.

How to install the Tool Chainer MCP server

{
  "mcpServers": {
    "mcp_tool_chainer": {
      "command": "npx",
      "args": ["-y", "@thirdstrandstudio/mcp-tool-chainer", "`claude_desktop_config.json` or `mcp.json`"],
      "env": {}
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

  • Node.js (v16 or later) * npm

Example prompts to try

  • Use Tool Chainer to Prerequisites.

Frequently asked questions

By chaining tools, Tool Chainer avoids sending large intermediate results back to the LLM. Only the final result is returned, significantly reducing token consumption.