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ToolCargo

mailto link

Live

A mailto: button with subject and body — does not send.

For contact pages and ads. Email check tests whether the address can receive mail.

Server URL

streamable http
https://toolcargo.com/mcp/mailto-link

Claude Code

terminal
claude mcp add --transport http --scope user toolcargo-mailto-link https://toolcargo.com/mcp/mailto-link \
  --header "Authorization: Bearer YOUR_API_KEY"

Create a key in your dashboard. Other clients: setup guides.

What it helps you do

  • A mailto URL

Built for: Sites putting a contact button on a landing page.

Example requests

Contact CTA

“Build mailto hello@client.com subject Quote with ToolCargo.”

mailto:hello@client.com?subject=Quote

Step-by-step workflows: pre-launch check · fixing link previews

Tools

ToolWhat it doesAccess
build_mailto
Build a mailto link
mailto: URL with optional subject, body and cc. Does not send mail.Read-only

Requirements

  • • A ToolCargo account with Site Audit activated (free).

Limitations

  • • Does not send mail.

Supported clients

“Tested” means we connected that client to this endpoint and ran a tool call ourselves. “Documented” means the client supports this setup per its own docs, but we have not tested it yet.

Claude CodeAPI key headerTestedRemote HTTP server with an Authorization header. Tested 2026-09-11 (v2.1.268).
Claude (claude.ai)OAuth sign-inTestedCustom connector with OAuth sign-in; tested on claude.ai web 2026-09-11. Desktop and mobile use the same account connectors but were not tested separately.
CursorAPI key headerDocumented, not yet testedmcp.json with url and headers.
VS Code (Copilot agent mode)API key headerDocumented, not yet tested.vscode/mcp.json with type http and headers.
ChatGPT (developer mode)OAuth sign-inDocumented, not yet testedRequires OAuth; API keys cannot be entered.
MCP InspectorAPI key headerTestedCLI mode, tested 2026-09-11. Useful for calling tools directly.

Pricing

Free

$0

For trying the connector on your own sites.

50 calls/month · 25 links per check

Pro

$12/mo

For freelancers and agencies auditing client sites every week.

2,000 calls/month · 100 links per check

Proposed test price. See the pricing page for checkout status.

Full pricing and billing details