Pingfloat MCP Server – Free Developer Tools for AI Agents

A free remote MCP server for Claude, Cursor, and other MCP-compatible AI assistants — check meta tags, Open Graph, and schema markup, generate QR codes, and create IP/user-agent capture links.

Pingfloat provides a free remote MCP server that gives Claude, Cursor, and any other Model Context Protocol-compatible AI assistant a set of web development, SEO, and diagnostic tools — without you leaving the chat.

Every tool needs a free Pingfloat API key, except create_account — that one bootstraps the rest. Connect once with no key to create an account, then reconnect with the key you're given. See the setup steps below.

What you can do

Check Meta Tags with AI Title, description, canonical, viewport, robots, lang Check Open Graph Tags with AI og:title, og:image, og:type, Twitter card tags Validate Schema Markup with AI JSON-LD structured data and @type values Generate QR Codes with AI Instant QR code SVGs in four style presets

Capture links

Three more tools create and check one-time links, without a dedicated doc page each — ask your assistant and it handles the rest:

Capability	MCP tool	What it does	Needs a key?
Create IP Capture Links	`create_ip_capture(label?)`	Generates a link that records the visitor's IP address, country, city, and ISP when opened.	Yes
Create User-Agent Capture Links	`create_ua_capture(label?)`	Generates a link that records the visitor's browser and device details when opened.	Yes
Check a capture link	`check_capture(shareCode)`	Looks up whether a capture link has been visited yet and returns the recorded data.	Yes
Create a free account	`create_account(email)`	Emails a sign-in link; once clicked, hands back an API key to use for everything else.	No — this is how you get one

Add it to your AI assistant

Every tool except create_account requires a free Pingfloat API key. There are two steps: connect once without a key to create an account, then reconnect with the key you're given.

Step 1 — connect and create an account

Pingfloat's MCP server is remote and requires no install — point your assistant at the SSE endpoint:

https://mcp.pingfloat.com/sse

Claude (claude.ai): Settings → Connectors → Add custom connector, then paste the URL above.

Claude Code / Cursor: add this to your MCP config (~/.claude/settings.json, claude mcp add, or Cursor Settings → MCP):

{
  "mcpServers": {
    "pingfloat": {
      "url": "https://mcp.pingfloat.com/sse"
    }
  }
}

With no key, only one tool works: ask the assistant to run create_account with your email. Click the sign-in link it emails you, and you'll get an API key back.

Step 2 — reconnect with your key

MCP clients (including claude.ai's connector UI) generally only accept a URL, not custom headers — so the key goes in the URL as a query parameter. Update your connector URL to:

https://mcp.pingfloat.com/sse?key=YOUR_KEY

For Claude Code / Cursor, update the same config:

{
  "mcpServers": {
    "pingfloat": {
      "url": "https://mcp.pingfloat.com/sse?key=YOUR_KEY"
    }
  }
}

Then reconnect (restart the client, or re-add the connector). Every tool is now available. Already have a key from your account page? Skip straight to step 2.

Try it — example prompts

Once connected with your API key (step 2 above), just ask in plain language. No slash commands or special syntax needed:

Check the meta tags on https://example.com
Does https://example.com have valid Open Graph tags?
Check the structured data on https://example.com
Generate a QR code for https://example.com
Create a link that tells me what browser the recipient is using.
Create a link that captures someone's IP address and location when they open it.

Free to use

Every tool is free. Free accounts get 10 requests per hour across the checks and QR generation; Free+ and paid accounts get 50 per hour. There's no separate MCP-specific limit — it's the same account-level rate limit as the HTTP API, since MCP tool calls use your API key under the hood.

Frequently asked questions

Is the Pingfloat MCP server free?

Yes. Every tool is free to call once you have an API key, which itself is free — created via the create_account tool or at pingfloat.com/account. Free accounts get 10 requests per hour; Free+ and paid accounts get 50.

Which AI assistants support MCP?

Any client that implements the Model Context Protocol, including Claude (claude.ai and Claude Code), Cursor, and a growing list of other AI coding tools and desktop assistants. Connect using the SSE endpoint at https://mcp.pingfloat.com/sse.

Do I need an API key?

For every tool except create_account, yes. Run create_account(email) with no key connected, click the link it emails you, then reconnect using the key you're given as ?key=... on the SSE URL.

Why do I have to reconnect instead of just using the key right away?

The key is read once, when your MCP client opens the connection — most clients (including claude.ai's connector UI) only let you configure a URL, not send custom headers per call, so the key has to live in that URL. Update the URL and reconnect to pick up a new key.

Is there also a plain HTTP API?

Yes — see the Pingfloat Public API for direct HTTP endpoints, including the same QR code generator and page-check tools the MCP server uses under the hood. It uses the same API key and rate limit.