SendGrid

🔑 BYO Key — Email

Transactional and marketing email service by Twilio. Send emails with high deliverability, templates, and analytics.

🔑 Setup Required — Bring Your Own Key This integration requires API credentials. Store them once via setup_integration or the Dashboard Vault — they're encrypted with AES-256-GCM and never exposed.

Required Credentials

sendgrid_api_key

API Key

Find your API key at app.sendgrid.com → Settings → API Keys. Keys start with "SG."

Get your API key at sendgrid.com →

Try it with your AI assistant

Once WebsitePublisher is connected to your AI assistant, paste one of these into the chat.

ChatGPT Claude Other assistants

@WebsitePublisher send my booking confirmation emails through my SendGrid account

With WebsitePublisher, send my booking confirmation emails through my SendGrid account

Endpoints (1)

POST send-email

Send a transactional email via SendGrid. Uses the v3 mail/send endpoint with personalizations for recipient handling.

Field	Type	Required	Description
`personalizations`	array	✓ Yes	Array of recipient objects. Each needs a "to" array with {"email": "...", "name": "..."} objects. Can include per-recipient "subject" and "dynamic_template_data". Example: [{"to": [{"email": "user@example.com", "name": "User"}]}]
`from`	array	✓ Yes	Sender object with "email" (required) and "name" (optional). Must be a verified sender. Example: {"email": "noreply@yourdomain.com", "name": "Your App"}
`subject`	string	No	Global email subject line. Can be overridden per personalization.
`content`	array	No	Array of content objects. Each has "type" (e.g. "text/plain", "text/html") and "value" (the content). Example: [{"type": "text/html", "value": "<h1>Hello</h1>"}]
`reply_to`	array	No	Reply-to object with "email" and optional "name"
`template_id`	string	No	ID of a dynamic template to use (starts with "d-"). When used, content is optional.
`categories`	array	No	Array of category strings for tracking (max 10 categories, max 255 chars each)
`send_at`	integer	No	Unix timestamp to schedule email delivery (up to 72 hours in advance)
`attachments`	array	No	File attachments: [{ filename, content_base64, mime_type }], or [{ filename, asset_slug }] for a file uploaded as an asset of this project (max 1 MB per asset; preferred for static files such as brochures, so the file is not repeated in every form config).

MCP Tool Names

When using this integration through an AI assistant (Claude, ChatGPT, Cursor, etc.), the endpoints are available as MCP tools:

Endpoint	MCP Tool Name
send-email	`sendgrid_send_email`

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