truemarkets-mcp-server

MCP (Model Context Protocol) server for True Markets. Gives AI agents native trading capabilities without shelling out to bash.

Why this exists

The True Markets CLI (tm) works with agents through bash skills — the agent runs tm buy SOL 50 -o json --force and parses stdout. This works, but has fundamental problems:

1. Two-quote problem: --dry-run and --force fetch separate quotes. The agent decides based on quote A but executes at quote B's price.

2. No slippage protection: No mechanism to reject execution if price moves.

3. Process overhead: Every command spawns a new process, re-reads credentials, re-establishes HTTP connections.

4. Fragile parsing: Agent must parse JSON from stdout mixed with stderr warnings.

The MCP server solves all of these:

• Quote caching: tm_get_quote returns a quote_id cached for 60 seconds. tm_execute_trade uses the same quote — no price surprise.

• Structured responses: Tools return typed JSON via MCP's structuredContent, no stdout parsing.

• Persistent auth: Credentials loaded once on startup, tokens refreshed automatically.

• Native tool calls: Agents call tools directly instead of composing bash strings.

Tools

Read-only

Trading

Agent workflow

1. tm_get_balances          → check available funds
2. tm_get_quote(buy, SOL, 50) → inspect price, fee, issues
3. [agent decides: price acceptable? issues empty?]
4. tm_execute_trade(quote_id) → execute the SAME quote

Compare to the CLI flow where step 4 fetches a new quote silently.

Setup

Prerequisites

• Node.js 18+

• Existing True Markets account (tm signup / tm login via the CLI)

• API key configured (tm config set api_key <key>)

The MCP server reads credentials from ~/.config/truemarkets/ — the same location the CLI uses. No separate auth setup needed.

Install

npm install -g truemarkets-mcp-server

Configure your agent

Claude Code / claude.ai

Add to your MCP config (.claude/mcp.json or via settings):

{
  "mcpServers": {
    "truemarkets": {
      "command": "truemarkets-mcp-server",
      "args": []
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "truemarkets": {
      "command": "npx",
      "args": ["truemarkets-mcp-server"]
    }
  }
}

Environment variables

Development

git clone https://github.com/true-markets/mcp-server.git
cd mcp-server
npm install
npm run build
npm start

Test with the MCP inspector:

npx @modelcontextprotocol/inspector node dist/index.js

Architecture

src/
├── index.ts              # Entry point, stdio transport
├── constants.ts          # API host, paths, version
├── types.ts              # Shared types and helpers
├── services/
│   ├── auth.ts           # Token/key management (reads ~/.config/truemarkets/)
│   ├── api-client.ts     # DeFi Gateway HTTP client
│   └── signer.ts         # Turnkey P256 payload signing
└── tools/
    ├── read.ts           # Read-only tools (price, balances, assets, profile)
    └── trade.ts          # Trading tools (quote, execute, transfer)

License

MIT