0n3
MCP servers · email

SendGrid MCP server

Transactional and marketing email — send, templates, contacts. Hosted by 0n3: 5 endpoints your AI can call with your own SendGrid account, from Claude, ChatGPT, Cursor, Claude Code, Codex or Gemini CLI. One sign-in, one key per AI, a receipt for every call.

Connect SendGridInstall into your AIWatch it work

5 endpoints4 categoriesauth: api_keyhosted

What your AI can do with SendGrid

Send email · Send transactional emails1
Send an emailPOST /mail/send
Contacts · Manage email contacts and lists2
Add contactsPUT /marketing/contacts
Search contactsPOST /marketing/contacts/search
Templates · List email templates1
List templatesGET /templates
More · Everything else this app exposes.1
List listsGET /marketing/lists

Install in three steps

  1. Create a free account at 0n3.app and connect SendGrid: paste a key or sign in through a door. It lands in your vault, encrypted.
  2. Open 0n3.app/install, pick your AI. A key is made for that AI alone; copy the line it gives you.
  3. Ask your AI: whoami. It answers with your connected services. Then ask it to send an email in SendGrid.
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"

Connect SendGrid to

Claude Code + SendGridMCP server + skillClaude (desktop & claude.ai) + SendGridconnectorChatGPT + SendGridconnector · GPT actionCodex CLI + SendGridMCP serverGemini CLI + SendGridMCP serverCursor + SendGridMCP serverVS Code (Copilot) + SendGridMCP serverWindsurf + SendGridMCP server

More email MCP servers

Resend67 endpointsGmail13 endpointsPostmark9 endpointsMailgun8 endpoints

Questions

What can an AI do with the SendGrid MCP server?

5 things: send email, contacts, templates, more. Every call runs with your own SendGrid connection and lands on a receipt.

Do I need to run anything on my computer?

No. 0n3 is hosted. Connect SendGrid once, install 0n3 into your AI with one line, done.

Where does my SendGrid key go?

Into your 0n3 vault, encrypted, one record per connection. The AI never sees it.