Send Tantra engagement events to any HTTPS endpoint.
Subscribe an endpoint to the calendar, email, LinkedIn, WhatsApp, and Telegram events your downstream workflow needs.
Requires an HTTPS endpoint that can receive POST requests.
What you get
Independent endpoints
Register multiple endpoints, each with its own event subscriptions.
11 event types
Choose from 11 selectable production event types: 3 calendar, 4 email, 2 LinkedIn, 1 WhatsApp, and 1 Telegram.
Test payloads and headers
Send a schema-discovery test payload, with headers that include the event type and a unique event ID.
Durable delivery
Delivery attempts and a delivery history are recorded for every event.
At-least-once delivery
Delivery is at least once; deduplicate downstream using the event ID.
Full endpoint controls
Enable, disable, preview, test, edit, or delete an endpoint at any time. Social events are gated by the matching channel add-on.
How it works
- Step 1
Create a public HTTPS receiver
- Step 2
Register the URL
- Step 3
Select events
- Step 4
Send a test
- Step 5
Respond 2xx quickly
- Step 6
Deduplicate by event ID
Supported actions and data
Tantra can do
- POST calendar, email, LinkedIn, WhatsApp, and Telegram events to your endpoint
- Retry delivery and keep a delivery history per attempt
Tantra receives
- A 2xx response from your endpoint acknowledging delivery
Requirements and permissions
An HTTPS endpoint that can receive POST requests
A handler that responds quickly, within the documented timeout
Good to know
- Delivery is at least once; deduplicate downstream using the event ID.
- Endpoints must respond within the documented timeout.
- Calendar webhooks emit RSVP transitions, not unchanged snapshots.
- Social replies must belong to a sequence-linked conversation.
- n8n, Zapier, and Make are webhook consumers, not native Tantra connectors.
Frequently asked questions
Will I receive every event exactly once?
- Delivery is at least once. Deduplicate on the receiving end using the event ID in the headers.
Do social events fire even without a channel add-on?
- No. Social event delivery is gated by the matching channel add-on being active.
Do calendar RSVP events fire on every poll?
- No. Calendar webhooks emit RSVP transitions into Yes, No, or Maybe, not unchanged snapshots.
Related integrations
REST API
Use revocable account-level keys to automate supported Tantra API operations.
- Operate campaigns, contacts, webhooks, and related workflows over HTTPS
- Authenticate requests with an X-API-Key header
MCP Server
Operate supported Tantra workflows from Claude, Cursor, and other MCP clients.
- Operate the registered tool set from any MCP-compatible client
- Bind a session to your Tantra account with an API key
Recipesn8n
Receive Tantra campaign events in n8n and route them into the workflow you build.
- POST calendar, email, LinkedIn, WhatsApp, and Telegram events to your n8n webhook URL
- Retry delivery and record delivery history for each attempt
RecipesZapier
Send Tantra activity to a Zapier Catch Hook and route it into thousands of Zapier actions.
- POST calendar, email, LinkedIn, WhatsApp, and Telegram events to your Zapier Catch Hook
- Retry delivery and record delivery history for each attempt
Create a webhook.
POST calendar, email, LinkedIn, WhatsApp, and Telegram events to your HTTPS endpoint.