mailto link
LiveA 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
https://toolcargo.com/mcp/mailto-linkClaude Code
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
| Tool | What it does | Access |
|---|---|---|
build_mailtoBuild 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 Code | API key header | Tested | Remote HTTP server with an Authorization header. Tested 2026-09-11 (v2.1.268). |
| Claude (claude.ai) | OAuth sign-in | Tested | Custom 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. |
| Cursor | API key header | Documented, not yet tested | mcp.json with url and headers. |
| VS Code (Copilot agent mode) | API key header | Documented, not yet tested | .vscode/mcp.json with type http and headers. |
| ChatGPT (developer mode) | OAuth sign-in | Documented, not yet tested | Requires OAuth; API keys cannot be entered. |
| MCP Inspector | API key header | Tested | CLI mode, tested 2026-09-11. Useful for calling tools directly. |
More in Messaging
Pricing
Free
$0For trying the connector on your own sites.
50 calls/month · 25 links per check
Pro
$12/moFor 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.