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Builder MCP is PolyAI’s authenticated MCP server for building agents. Connect an MCP client such as Claude Code, Cursor, Claude Desktop, or Codex, and you can create, test, and publish PolyAI agents from your IDE without calling the REST API yourself. When the client connects, it discovers the available tools and their input schemas.
Looking to query conversation data (transcripts, metrics, analytics) rather than build? That’s the sibling Data MCP server.

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Builder MCP vs Agent Studio MCP integrations

The two point in opposite directions:

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What you can do

Builder MCP exposes PolyAI’s platform as tools grouped into three areas:

Agents

Create agents, edit behavior and knowledge, manage Branches, variants, connectors, and phone numbers.

Data

Retrieve conversations and transcripts to test and inspect agent behavior.

Alerts

Create alert rules and read active alerts to monitor deployed agents.
See Capabilities for the full tool list.

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Why use it

  • No API plumbing. The client reads each tool and its schema from the server, so you don’t hand-write requests, hosts, or headers.
  • Conversational workflows. Ask your assistant to create a Branch, update its greeting, test it, and move it to Staging, and it runs the tool calls in order.
  • Full deployment lifecycle. Variants, environments, and deployments are available as tools. See the walkthrough.
  • One API key. A single account API key authenticates every tool.

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Get started

1

Authenticate

Create an account API key.
2

Connect your client

Add Builder MCP in one command. See Quickstart.
3

Build, test, publish

Follow the end-to-end walkthrough.
Last modified on September 15, 2026