Build Inbox Agents from Claude, Cursor & Codex
The Underfive MCP connector is live. Add one URL, sign in, and configure AI Inbox Agents, review replies, track conversations, and pull analytics, straight from the tools you already build in. No API keys to manage.
Available on the Growth, Business and Agency plans.
Works with Any MCP Client
If your AI tool speaks the Model Context Protocol, it speaks Underfive.
Claude
One-click custom connector
Cursor
AI code editor
Codex
OpenAI Codex CLI
Any MCP client
VS Code, Windsurf & more
Connect in Seconds
Add one connector URL and sign in with your Underfive account. Nothing to install, no proxy, and no keys to copy or rotate.
- 1
Add the connector
In Claude, open Settings → Connectors → Add custom connector. In Cursor, Codex, or any client, add it as a remote MCP server.
- 2
Sign in to authorize
Authorize with your Underfive account. No API keys to generate or manage.
- 3
Start building
Ask your AI to configure agents, review replies, and pull analytics.
One URL for every client. Claude offers a one-click custom connector; other clients add it as a remote MCP server.
{
"mcpServers": {
"underfive": {
"url": "https://app.underfive.ai/api/mcp"
}
}
}What You Can Do
The connector exposes your entire Underfive workspace as tools your AI agent can call directly.
Agent Configuration
View your configured inbox agents and update their settings and custom instructions, so you build and tune Inbox Agents without leaving your editor.
Message Management
List pending approval drafts, retrieve AI-drafted replies, and read full thread message histories in real time.
Conversation Tracking
Access threads with live status, meeting outcomes, and performance metrics across every campaign.
Lead Operations
Retrieve leads with global status classifications (active, customer, or do-not-contact) for scoring and enrichment workflows.
Approvals Queue
Surface every reply waiting on a human, review the draft, and keep your approval workflow moving from any MCP client.
Daily Analytics
Generate daily summaries with activity counters and automation-versus-human ratios to report on performance instantly.
No API Keys to Manage
The connector authorizes with your Underfive login, so there is nothing to generate, paste, or rotate.
Sign in to connect
Authorize with your Underfive account in the browser. No secrets in config files.
Scoped to your workspace
Access reflects your account, so the agent only ever sees what you can see.
Revoke anytime
Disconnect the connector from your Underfive dashboard whenever you want.
Prefer the REST API?
The same data and actions are available through the Underfive REST API. Full reference, authentication, and endpoint docs live at docs.underfive.ai.
Open the Docs- ✓ MCP connector guide
- ✓ Endpoint reference
- ✓ Tool schemas & examples
- ✓ REST API authentication
Start Building on Underfive
Connect the Underfive MCP connector, sign in, and build Inbox Agents from Claude, Cursor, or Codex today. No API keys required.