Tools That Ship with the API

The Responses API includes powerful built-in tools that require zero setup - just enable them in your request.

Built-in Tool Catalog

Agentic Loops

The model can chain multiple tools in a single request. Ask "Research competitor pricing and create a chart" and it will:

1. Call web_search to find pricing data
2. Call code_interpreter to build a matplotlib chart
3. Return the chart image + text analysis

const response = await openai.responses.create({
  model: "o3-mini",
  tools: [
    { type: "web_search" },
    { type: "code_interpreter" }
  ],
  input: "Find the latest Bitcoin price and plot a 7-day chart"
});

MCP Integration

// Connect to remote MCP servers directly in the API
const response = await openai.responses.create({
  model: "o3-mini",
  tools: [{
    type: "mcp",
    server_label: "my-crm",
    server_url: "https://mcp.acme.com/sse",
    require_approval: "always"
  }],
  input: "Look up the latest deal status for Acme Corp"
});