Send16 MCP

Last 30 days

Uptime

100%

Response time

144 ms typical, 144 ms slowest 5%

Last check

8 h ago

Next check

any minute now

How to call it

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "send16-mcp": {
      "type": "http",
      "url": "https://mcp.send16.com/mcp"
    }
  }
}

82 tools

• whoami

  Verify the API key and return the authenticated workspace: name, plan, email quota (used/limit), and owner. Call this first to confirm the key works before sending. Pair with list_domains to see which `from` addresses are allowed.

• send_email

  Send a transactional email through Send16. Provide `html`, `text`, or both (text-only is fine for OTPs/receipts/alerts). `from_email` must belong to a domain that is verified in the workspace — call `whoami` for the account and `list_domains` to see which senders are allowed; a s

• send_campaign_test

  Send a test email for an existing campaign to preview how it will look in recipients' inboxes.

• create_campaign

  Create a new email campaign as a draft: optionally with full HTML content and recipients (exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll) so it's ready to test and send. Nothing is sent until schedule_campaign.

• design_email_template

  Use AI to generate a complete email HTML template based on a description. Returns ready-to-use HTML that can be sent or used in campaigns.

• list_campaigns

  List email campaigns, newest first. Use `search` to find a past campaign the user describes vaguely ('the invite one', 'that July newsletter') — it matches name and subject case-insensitively; try distinctive words from their description and broaden if no hits.

• create_contact

  Add a single new contact, optionally straight into audiences and/or with tags — e.g. 'add this person from my email into the newsletter list'. Contacts are subscribed by default. For more than a handful of people, use import_contacts instead.

• search_contacts

  Search contacts by email address or name. Returns matching contacts with their tags and subscription status.

• list_contacts

  List all contacts with optional filtering by subscription status and tag. Supports pagination.

• import_contacts

  Bulk import contacts from CSV data (min column: email), optionally straight into audiences and/or with tags. This is the tool for cross-app flows — e.g. pulling people out of Gmail, a CRM, or a spreadsheet and landing them in a Send16 audience in one call. Set updateExisting for

• list_domains

  List all sending domains configured in your Send16 workspace, including their verification status and DNS records.

• check_domain_health

  Check the DNS health of a specific domain, including DKIM, SPF, DMARC, and MX record verification status. Triggers a fresh DNS lookup.

• get_campaign_stats

  Get detailed performance statistics for a specific campaign including open rate, click rate, bounce rate, and delivery metrics.

• get_deliverability_status

  Get your workspace's deliverability summary — sending reputation, domain authentication status, and recent bounce/complaint health. (Deliverability Hub plan feature.)

• list_automations

  List all automations in the workspace, including draft/active/paused status and trigger types.

• get_automation

  Get a single automation by ID, including its trigger, steps, and current status.

• enroll_in_automation

  Manually enroll a contact in an active automation. The automation must be in 'active' status. Use send_event for event-driven enrollment.

• send_event

  Fire a custom event for a contact. Automations whose trigger is `{type:'custom_event', eventName:'<name>'}` will enroll the contact and start running. Payload is exposed to condition steps as `event.<key>`.

• list_templates

  List starter-gallery email templates available to every workspace.

• save_template

  Save an email design as a reusable template in the user's Send16 workspace. Use this when the user has designed an email (for example in a Claude artifact) and wants it in Send16. Pass the complete email HTML. Send16 hosts every image (remote URLs and inline data: images), conver

• list_workspace_templates

  List the templates saved in the user's own Send16 workspace (their template library, including ones saved with save_template). For the shared starter gallery use list_templates.

• send_template_test

  Send a preview of a saved workspace template to one email address, so the user can see it in a real inbox. It arrives from [email protected] with a small 'Template test preview' banner and uses sample merge values (first name 'Test'). Only send to the user's own address unless t

• get_template

  Get a single starter template by ID, including its EmailContent JSON.

• render_email_content

  Compile an EmailContent JSON object (the shape used by the Send16 builder + templates) into HTML using the platform's authoritative renderer. Returns the exact HTML the API would send. Useful for previews and post-processing.

• add_domain

  Register a new sending domain. Returns the DNS records the user must add to their DNS provider, after which they should call check_domain_health to verify.

• pre_send_review

  Run an AI pre-send review on an email's HTML before sending. Surfaces tone issues, broken links, missing alt text, spam triggers, and accessibility problems.

• generate_email_from_url

  Scrape a URL (e.g. a launch blog post or product page) and generate an email draft from its content. Returns subject, preview text, and HTML body.

• list_messages

  List messages from the unified send log (transactional + campaign). Filter by recipient, sender, status, date range, or source.

• get_message

  Fetch a single message with its full event timeline (created → sent → delivered → opened → clicked → ...).

• get_message_events

  Get just the delivery event timeline for a message — no body or recipient details.

• list_convos

  List inbox conversations. Filter by state, mailbox, label, screener status, or full-text search. Send16's unified inbox combines transactional reply threading with team-managed shared inboxes.

• get_convo

  Get a single conversation with its full thread of posts (incoming + outgoing).

• send_reply

  Reply to an inbox conversation. The reply is sent from the original recipient address (the alias the convo arrived on) and threaded back to the contact.

• mark_convo_read

  Mark a conversation as read for the current viewer.

• update_convo

  Update conversation status (open/closed/archived/snoozed) or assignee.

• add_convo_note

  Add a private internal note on a conversation. Notes are visible only to workspace members.

• screener_decide

  Decide a pending screener conversation (first-time sender). 'allow' lets future emails through, 'reject' blocks, 'cold' marks as cold outreach.

• list_inbox_counts

  Get unread/total counts per category and label for the inbox sidebar (newsletter, transactional, marketing, calendar, social, cold).

• list_topics

  List subscription topics. Topics are granular categories contacts can subscribe to (e.g. 'product-updates', 'weekly-digest'). Campaigns and automations can be gated to subscribers of a specific topic.

• create_topic

  Create a new subscription topic. Contacts opt into topics individually via the preference center.

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