Frontal’s MCP server

Connect Claude, ChatGPT or any MCP client to frontal.so. Your assistant can then answer from Frontal’s own pages: the five services, the published case studies, the GTM plays library and the FAQ. When you ask for a call, it can start the booking for you.

Every answer names the frontal.so page it came from. Every tool only reads what the site already publishes, except one: request_intro_call, which sends your work email to Frontal when you ask to book a call.

Connect it

Pick your app. Each button opens that app’s own install form with Frontal filled in, and nothing is added until you confirm it there.

Then ask, for example: “What does Frontal do for RevOps?”, “Show me Frontal’s case studies that used Clay”, or “I’d like to book a call with Frontal.”

The GTM API directory server

The GTM API directory has its own MCP server, at https://frontal.so/gtm-apis/mcp. It answers with the directory’s verified prices, free tiers, rate limits, auth and MCP servers for 26 go-to-market APIs, plus 67 comparisons and 4 stacks. Its 7 tools only read, and it needs no sign-in. Connect it where you build: Cursor, VS Code or Claude Code.

Step by step

If a button does not open your app, add the server by hand. These steps use Frontal’s server; for the GTM API directory, use https://frontal.so/gtm-apis/mcp instead.

claude mcp add --transport http frontal https://frontal.so/mcp

{
  "mcpServers": {
    "frontal": {
      "url": "https://frontal.so/mcp"
    }
  }
}

{
  "servers": {
    "frontal": {
      "type": "http",
      "url": "https://frontal.so/mcp"
    }
  }
}

What it can do

The server has 13 tools. This list is read from the server itself.

Interactive cards

In Claude, ChatGPT and other apps that support MCP Apps, four of the tools show an interactive card in the conversation. The card follows the app’s light or dark theme. Apps without cards get the same answer as text.

Ask Frontal on this site

No assistant to connect? Ask Frontal answers from the same pages, here on frontal.so. Press Cmd+K or Ctrl+K on any page, or use the button below. It lists the matching pages as you type; choose your question for a short answer that cites the pages it used. When a short answer is not available, you get the matching pages instead.

What the booking tool sends, and where

request_intro_call runs only when you ask to talk to Frontal or book a call, with the work email you give. It makes the same capture as the booking form on frontal.so.

What it sends

Your work email. Your name, company, company website, the service you are interested in and a short note, only if you gave them. With them, a record of where the request came from: the source (mcp), the campaign tags utm_source=mcp, utm_medium=ai-assistant and utm_campaign=request_intro_call, the time, and the name your assistant’s app sends with its requests (for example Claude-User).

Where it goes

Clay, where Frontal keeps its lead records, and Frontal’s lead-routing tool, which runs the booking app at book.frontal.so. If you do not pick a time, the lead-routing tool may add you as a contact and a deal in HubSpot, Frontal’s CRM, and tell Frontal’s team in Slack, so someone can follow up by email.

What it never does

It does not read your conversation. It refuses free email domains such as gmail.com, and more than one person per request. It does not book a meeting: the call is booked only when you pick a time on book.frontal.so.

Repeats

The same request again within ten minutes usually returns the same link and sends nothing new. The check is best effort, so a repeat can reach Frontal twice.

How long Frontal keeps it

Lead records are kept for 24 months after your last interaction with Frontal, as the Privacy Policy explains. To see, correct or delete what Frontal holds about you, email privacy@frontal.so.

The other 12 tools send nothing to Frontal beyond the request itself: they read the pages, case studies, plays and FAQ that frontal.so already publishes.

Privacy, terms and support

• Privacy Policy: what Frontal collects, why, who it shares it with and how long it keeps it.
• Terms and Conditions.
• Support and questions about the server: sales@frontal.so.
• Requests about your data: privacy@frontal.so.

For developers

Endpoint

POST https://frontal.so/mcp, JSON-RPC 2.0 over Streamable HTTP. Stateless: no sessions, JSON responses, one request per POST, no batches. GET answers 405.

Protocol versions

2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05

Capabilities

Tools, two ui:// resources (the cards, text/html;profile=mcp-app) and the MCP Apps extension io.modelcontextprotocol/ui. Every tool declares a title, read and write hints and an output schema.

Limits

64 KB a request, 120 requests a minute per client, 5 booking requests a minute per client and 12 written answers a minute per client from ask (past that, ask returns the matching pages and passages). A bad argument comes back as a tool error that names it.

Server Card

https://frontal.so/mcp/server-card, also listed in /.well-known/ai-catalog.json.

Ask Frontal

ask runs the same engine as the NLWeb endpoint https://frontal.so/ask: it ranks passages from the site’s own pages, and a model on Frontal’s Cloudflare Worker writes a short answer from those passages only. Every number and name in the answer is checked against the passages it cites before it is returned.

Without MCP

llms.txt, and a markdown version of every page at its URL plus .md. Go-to-market API prices and limits are in the GTM API directory, which has its own MCP server.