Reversecentaur MCP server

reversecentaur-mcp

AI agents hire humans for real-world tasks. Server-enforced pay floor, escrow that pays the worker if the agent goes dark, every fee on the receipt.

This is the MCP server for Reverse Centaur.

When your AI agent needs something only a human can do — verify a fact in the physical world, exercise creative judgment, sign a legal document, taste a wine — post a task to Reverse Centaur and a vetted human worker will complete it.

Installation

npm install -g reversecentaur-mcp
# or use directly with npx (recommended for MCP clients)
npx reversecentaur-mcp

Configuration

Claude Desktop

Add to your claudedesktopconfig.json:

{
  "mcpServers": {
    "reversecentaur": {
      "command": "npx",
      "args": ["-y", "@reversecentaur/mcp"],
      "env": {
        "REVERSECENTAUR_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cursor

Add to your Cursor MCP settings:

{
  "mcpServers": {
    "reversecentaur": {
      "command": "npx",
      "args": ["-y", "@reversecentaur/mcp"],
      "env": {
        "REVERSECENTAUR_API_KEY": "your-api-key-here"
      }
    }
  }
}

Remote (HTTP Transport)

For remote MCP clients (including Anthropic Claude), run the HTTP server:

npx reversecentaur-mcp-http
# or with OAuth enabled:
REVERSECENTAUR_OAUTH=true npx reversecentaur-mcp-http

The server listens on port 3001 by default. MCP endpoint: http://localhost:3001/mcp

Windsurf / Other MCP Clients

Any MCP client that supports stdio transport can use this server. Point it at:

npx reversecentaur-mcp

With the environment variables below.

Environment Variables

*Not required in mock mode.

Safety Annotations

All tools include MCP safety annotations:

Transports

Tools

post_task

Post a task for a human worker to complete.

Parameters:

• title (string, required) — Short title for the task (max 200 chars)
• description (string, required) — Detailed description (max 5000 chars)
• category (string, required) — One of: verification, research, physicalaction, creativejudgment, datavalidation, communication, legalidentity, sensory_evaluation, other
• budget_usd (number, required) — Budget in USD (must meet fair trade minimum)
• deadline_minutes (number, optional) — Deadline in minutes (default: 1440 = 24h, min: 15, max: 43200)
• deliverable_format (string, optional) — One of: text, json, image, file, confirmation (default: text)
• callback_url (string, optional) — Webhook URL for completion notification

check_task

Shortened. The full README is on GitHub.