Mentionable MCP Quickstart: Claude, ChatGPT, Cursor, n8n

Five minutes from zero to your first tool call.

How do I set up the Mentionable MCP?

Two paths, same endpoint. Clients with a Connect button (Claude, ChatGPT, Claude Code, Cursor) use OAuth: you paste the server URL and approve access, no key to create or store. Clients without OAuth (n8n, scripts, curl) use an API key. MCP access requires the Pro or Agency plan.

1. Connect with OAuth (recommended)

Claude (web and Desktop)

1. Open Settings → Connectors → Add custom connector.
2. Paste https://mentionable.ai/api/mcp, then click Connect.
3. A Mentionable screen opens. Sign in if needed, then click Approve.

The Mentionable tools appear in the tools menu of any new conversation.

ChatGPT

Add a custom connector for a remote MCP server, paste https://mentionable.ai/api/mcp, click Connect and approve on the Mentionable screen.

Claude Code

claude mcp add --transport http mentionable https://mentionable.ai/api/mcp

Then run /mcp, pick mentionable and choose Authenticate. Your browser opens the Mentionable approval screen.

Cursor

Open Cursor Settings → MCP → Add new MCP server and give only the URL:

{
  "mcpServers": {
    "mentionable": {
      "url": "https://mentionable.ai/api/mcp"
    }
  }
}

Cursor opens the Mentionable approval screen on first use.

Each approved connector shows up in Settings → MCP as a key named MCP OAuth (host). Revoke it there to disconnect the client.

2. Use an API key (n8n, scripts, curl)

1. Log in at mentionable.ai.
2. Open Settings → MCP.
3. In the API keys section, click Create key, name it (e.g. n8n-weekly-report), optionally restrict it to specific projects.
4. Copy the token. It starts with mnt_sk_ and is shown only once.

The Mentionable API key inherits the permissions of the workspace member who created it. Project-scope restrictions on the key intersect with member-level project restrictions. A revoked key cannot be re-used; create a new one to replace it.

n8n

Use the MCP Client node (n8n version 1.65 or later):

• Endpoint: https://mentionable.ai/api/mcp
• Authentication: Header Auth, set Authorization to Bearer mnt_sk_xxx
• Operation: Execute tool, pick a tool, fill in arguments.

Common pattern: Cron → MCP (list_prompts) → Function → Slack.

VS Code with GitHub Copilot Chat

Add to settings.json:

{
  "mcp.servers": {
    "mentionable": {
      "url": "https://mentionable.ai/api/mcp",
      "headers": {
        "Authorization": "Bearer mnt_sk_xxx"
      }
    }
  }
}

curl (sanity check)

curl -X POST https://mentionable.ai/api/mcp \
  -H "Authorization: Bearer mnt_sk_xxx" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/list"
  }'

A successful response is a JSON-RPC payload listing the 48 tools. A 401 means the key is wrong or revoked. A 429 means more than 100 requests in the last 60 seconds.

3. Run a hello-world tool call

Once connected, ask the agent:

List my Mentionable projects, then for the first one, show me the top 10 most-cited domains across all LLMs.

The agent chains list_projects → list_llm_sources and renders a table. That is the canonical Mentionable MCP pattern: discover the project, then drill into one resource.

Common errors

Next steps

• Skim Concepts to understand fan-out queries and the source taxonomy.
• Pick a workflow in Use cases and copy the system prompt into your agent.
• Read Authentication before sharing keys with teammates.