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AndersHsueh

tokens-saver-mcp

by AndersHsueh
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TypeScript
Hybrid

tokens-saver-mcp

A provider-agnostic MCP (Model Context Protocol) server that routes 7 narrow text-processing tools to budget models — local or cloud — to reduce main model token consumption.

Core idea: offload low-risk, structured, short-output sub-tasks (classification, extraction, summarization, rewriting, small code generation) to cheaper models, keeping complex reasoning and high-risk changes on Claude/GPT.

Tools

Tool

Purpose

tsm_classify

Classify text into a given label set

tsm_extract_json

Extract structured fields from long text

tsm_summarize

Compress long text to a short summary

tsm_rewrite

Rewrite text in a different style (or translate zh↔en)

tsm_codegen_small_patch

Generate small code snippets / function-level patches

tsm_diff_digest

Compress a git diff into a structured change summary

tsm_task_extract

Extract actionable tasks from unstructured text

All tools return both human-readable content and machine-consumable structuredContent.

Related MCP server: ai-workers-mcp

Requirements

  • Node.js >= 20

  • A running provider (local model or cloud API with OpenAI-compatible endpoint)

Setup

npm install
npm run build

Create ~/.tokens-saver-mcp/settings.json to configure providers (see below).
If the file does not exist, the server falls back to a built-in default pointing at http://127.0.0.1:1234 with zai-org/glm-4.7-flash.

Configuration

~/.tokens-saver-mcp/settings.json

{
  "defaultProvider": "remote_budget_cn",
  "providers": {
    "local": {
      "type": "openai_compatible",
      "baseUrl": "http://127.0.0.1:11434/v1",
      "apiKeyEnv": "",
      "model": "qwen2.5:14b",
      "timeoutMs": 15000,
      "maxRetries": 1,
      "temperature": 0.1
    },
    "remote_budget_cn": {
      "type": "openai_compatible",
      "baseUrl": "https://api.minimax.chat/compatible-mode/v1",
      "apiKeyEnv": "MINIMAX_API_KEY",
      "model": "MiniMax-M2.7",
      "timeoutMs": 20000,
      "maxRetries": 2,
      "temperature": 0.2
    }
  },
  "toolRouting": {
    "tsm_classify": "local",
    "tsm_extract_json": "remote_budget_cn",
    "tsm_summarize": "remote_budget_cn",
    "tsm_rewrite": "remote_budget_cn",
    "tsm_codegen_small_patch": "remote_budget_cn",
    "tsm_diff_digest": "remote_budget_cn",
    "tsm_task_extract": "local"
  }
}

Key rules:

  • API keys are never stored in the config file. Set apiKeyEnv to the environment variable name that holds the key.

  • For local providers with no auth, set apiKeyEnv to "".

  • toolRouting is optional — unrouted tools fall back to defaultProvider.

Usage

# Run as MCP server (stdio transport)
npm start

Claude Code integration

{
  "mcpServers": {
    "tokens-saver": {
      "command": "node",
      "args": ["/path/to/tokens-saver-mcp/dist/server.js"]
    }
  }
}

Development

npm test          # Run 61 tests
npm run typecheck # Type check only
npm run build     # Compile TypeScript
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Tools

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