API & MCP.

Your agents can use every tool directly. Free tier: 60 requests per hour, no key needed.

MCP

{
  "mcpServers": {
    "agenttoolbox": {
      "url": "https://agenttoolbox.net/api/mcp"
    }
  }
}

REST

GET  https://agenttoolbox.net/api/tools
POST https://agenttoolbox.net/api/tools/estimate_tokens   {"text":"hello"}
POST https://agenttoolbox.net/api/tools/convert_schema    {"name":"x","schema":{...}}
GET  https://agenttoolbox.net/api/directory?q=mcp

OpenAPI spec · llms.txt · Pro plan