io.github.spruikco/send16-mcp

Tools

• activate_automation

  Activate an automation. New events matching its triggers will start enrolling contacts.

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• add_contacts_to_audience

  Add contacts (by ID) to an audience.

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• add_convo_note

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

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• 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.

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• add_suppression

  Add an email to the suppression list. Future sends to this address will be blocked.

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• 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.

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• create_action

  Create an Action that maps an event name to a transactional template. Each matching event sends one email to the contact.

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• create_audience

  Create a new audience.

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• 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.

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• 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.

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• create_topic

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

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• create_webhook

  Register an outgoing webhook endpoint. Send16 POSTs event JSON to this URL with an HMAC-SHA256 signature. Outgoing webhooks are a plan feature.

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• delete_action

  Delete an Action.

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• delete_audience

  Delete an audience (list). Contacts are not deleted — only the list and its memberships are removed.

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• delete_campaign

  Delete a draft campaign. Sent campaigns cannot be deleted (only archived).

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• delete_contact

  Delete a contact and all associated events. Irreversible.

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• delete_topic

  Delete a subscription topic. All subscribers will be detached.

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• delete_webhook

  Delete an outgoing webhook endpoint.

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• 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.

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• duplicate_campaign

  Duplicate a campaign (template, content, and settings) as a new draft — works on sent campaigns too, so this is the way to re-use a past campaign's design. Optionally rename and retarget in the same call (exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll). NOTE: without retargeting, the copy keeps the ORIGINAL campaign's recipients.

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• 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.

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• 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.

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• get_action

  Get a single Action with its trigger config and template binding.

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• get_automation

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

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• get_automation_stats

  Get aggregate analytics for an automation: total enrollments, completed, exited, open/click rates per step.

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• get_brand

  Get the workspace's brand settings: colors, logo, fonts, and the DESIGN.md spec injected into AI generation prompts.

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• get_campaign_stats

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

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• get_contact_health_score

  Get a contact's 0-100 health score based on recent engagement (opens, clicks, replies).

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• get_contact_timeline

  Get a contact's full activity timeline: emails received, events fired, opens, clicks, automation enrollments, topic changes.

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• get_convo

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

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• get_deliverability_status

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

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• get_message

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

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• get_message_events

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

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• get_template

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

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• get_workspace

  Get the current workspace (the one the API key belongs to).

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• get_workspace_usage

  Get the current month's send count, contact count, and plan limits.

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• 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 upsert semantics (safe to re-run).

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• list_actions

  List Actions. Actions fire a transactional template when a custom event arrives — Plunk-style 'event_name → template' pairings, simpler than full automations.

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• list_audiences

  List audiences (lists). An audience is a static, manually-managed group of contacts.

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• list_automation_enrollments

  List active and historical enrollments for an automation.

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• list_automations

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

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• 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.

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• list_contacts

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

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• 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.

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• list_domains

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

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• list_inbox_counts

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

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• list_messages

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

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• list_segments

  List dynamic segments. Segments compute their members from a filter expression at send time.

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• list_suppressions

  List suppressed email addresses (bounces, complaints, unsubscribes, manual).

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• list_templates

  List starter-gallery email templates available to every workspace.

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• 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.

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• list_webhooks

  List configured outgoing webhooks (your endpoints that Send16 POSTs delivery events to). Outgoing webhooks are a plan feature.

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• list_workspaces

  List workspaces the authenticated user has access to (owner or member).

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• mark_convo_read

  Mark a conversation as read for the current viewer.

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• pause_automation

  Pause an automation. Existing enrollments freeze in place; no new contacts enroll.

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• pause_campaign

  Pause a sending campaign. Already-sent messages are unaffected; remaining sends halt.

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• 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.

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• preview_campaign_recipients

  Preview the recipient set for a campaign before sending. Returns count + sample list.

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• preview_segment

  Preview the contacts that match a segment without sending.

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• regenerate_webhook_secret

  Rotate the HMAC signing secret for an outgoing webhook endpoint. Returns the new secret once.

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• remove_contact_from_audience

  Remove a contact from an audience.

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• remove_suppression

  Remove an email from the suppression list. Use only when you've confirmed the recipient wants to receive mail again.

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• 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.

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• resume_campaign

  Resume a paused campaign.

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• schedule_campaign

  Schedule (or send immediately) an existing draft campaign to an audience/segment/topic.

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• screener_decide

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

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• search_contacts

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

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• send_broadcast

  One-shot broadcast: create a campaign and immediately schedule it to send, in a single call. Pass either an audienceId, segmentId, topicId, or fully-qualified filter. Provide html OR templateSlug.

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• send_campaign_test

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

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• 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 send from an unverified domain returns a clear error, not a silent failure. For a zero-setup first send, use from_email `onboarding@send16.com` — the sandbox sender delivers with no DNS, but only to your own account email.

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• 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>`.

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• 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.

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• update_action

  Update an Action (toggle enabled, change template, change event name).

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• update_brand

  Update workspace brand settings. The designSpec field is a Markdown DESIGN.md document fed into AI generation system prompts — use it to encode voice, do/don't lists, and visual rules.

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• update_campaign

  Update a draft campaign: name, subject, preview text, sender info, HTML content, and/or recipients. Retarget with exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll, then verify with preview_campaign_recipients before sending. Only drafts can be edited.

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• update_contact

  Update a contact's profile fields, custom fields, or subscription state.

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• update_convo

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

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• update_topic

  Update a subscription topic (name, description, default).

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• 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.

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