Ingest Events

curl --request POST \
  --url https://api.example.com/api/i/v1/{publicKey}/events \
  --header 'Content-Type: application/json' \
  --data '
{
  "visitorId": "<string>",
  "source": "<string>",
  "events": [
    {}
  ],
  "userIdentity": {},
  "customerIdentity": {},
  "type": "<string>",
  "title": "<string>",
  "eventName": "<string>",
  "properties": {},
  "formId": "<string>",
  "formFields": {},
  "email": "<string>",
  "userId": "<string>",
  "traits": {},
  "customerId": "<string>",
  "customerTraits": {},
  "activeTimeMs": 123,
  "totalTimeMs": 123,
  "sessionId": "<string>",
  "provider": "<string>",
  "eventType": "<string>",
  "startTime": "<string>",
  "endTime": "<string>",
  "duration": 123,
  "isRecurring": true,
  "inviteeEmail": "<string>",
  "inviteeName": "<string>",
  "stage": "<string>",
  "status": "<string>",
  "stripeCustomerId": "<string>"
}
'

{
  "success": true,
  "processed": 123,
  "errors": [
    {}
  ]
}

POST

api

{publicKey}

events

Ingest Events

curl --request POST \
  --url https://api.example.com/api/i/v1/{publicKey}/events \
  --header 'Content-Type: application/json' \
  --data '
{
  "visitorId": "<string>",
  "source": "<string>",
  "events": [
    {}
  ],
  "userIdentity": {},
  "customerIdentity": {},
  "type": "<string>",
  "title": "<string>",
  "eventName": "<string>",
  "properties": {},
  "formId": "<string>",
  "formFields": {},
  "email": "<string>",
  "userId": "<string>",
  "traits": {},
  "customerId": "<string>",
  "customerTraits": {},
  "activeTimeMs": 123,
  "totalTimeMs": 123,
  "sessionId": "<string>",
  "provider": "<string>",
  "eventType": "<string>",
  "startTime": "<string>",
  "endTime": "<string>",
  "duration": 123,
  "isRecurring": true,
  "inviteeEmail": "<string>",
  "inviteeName": "<string>",
  "stage": "<string>",
  "status": "<string>",
  "stripeCustomerId": "<string>"
}
'

{
  "success": true,
  "processed": 123,
  "errors": [
    {}
  ]
}

Endpoint

POST https://app.outlit.ai/api/i/v1/{publicKey}/events

Path Parameters

publicKey

string

required

Your organization’s public key. Starts with pk_.

Request Body

{
  "visitorId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "source": "client",
  "events": [
    {
      "type": "pageview",
      "url": "https://example.com/pricing",
      "path": "/pricing",
      "title": "Pricing - Example",
      "referrer": "https://google.com",
      "timestamp": 1699999999999
    }
  ]
}

Body Parameters

visitorId

string

Unique identifier for the visitor (UUID format). Required for browser (client) tracking. For server-side tracking (server source), this can be omitted; identity or attribution is derived from email, userId, fingerprint, customerId, or billing identifiers in the events.

source

string

default:"client"

Event source. One of: client (browser), server, integration.

events

array

required

Array of event objects to ingest (max 100 per request).

userIdentity

object

Optional user identity for immediate resolution. Used by browser SDK when user is logged in (via setUser()). Allows direct identity resolution instead of anonymous visitor flow.

Property	Type	Description
`email`	string	User’s email address
`userId`	string	Your system-owned user/contact ID
`traits`	object	User/contact traits

customerIdentity

object

Optional customer/account attribution for the whole batch. Used by browser SDK when the current user carries account/workspace context.

Property	Type	Description
`customerId`	string	Your system-owned customer/account/workspace ID
`customerTraits`	object	Customer/account traits

Event Types

All events share these common fields:

Field	Type	Required	Description
`type`	string	Yes	Event type (see below)
`timestamp`	number	No	Unix timestamp in milliseconds. Defaults to server time.
`url`	string	Yes	Full page URL
`path`	string	Yes	URL path (e.g., `/pricing`)
`referrer`	string	No	Referrer URL
`utm`	object	No	UTM parameters (see below)

UTM Parameters

{
  "utm": {
    "source": "google",
    "medium": "cpc",
    "campaign": "spring_2024",
    "term": "pricing software",
    "content": "header_cta"
  }
}

Pageview Event

Track a page view.

{
  "type": "pageview",
  "url": "https://example.com/pricing?plan=pro",
  "path": "/pricing",
  "title": "Pricing - Example",
  "referrer": "https://google.com/search?q=example",
  "utm": {
    "source": "google",
    "medium": "cpc",
    "campaign": "spring_2024"
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "pageview".

title

string

Page title.

Custom Event

Track any custom event.

{
  "type": "custom",
  "url": "https://example.com/pricing",
  "path": "/pricing",
  "eventName": "button_clicked",
  "properties": {
    "buttonId": "cta-hero",
    "page": "/pricing",
    "variant": "A"
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "custom".

eventName

string

required

Name of the custom event.

properties

object

Key-value pairs of event properties. Values can be string, number, boolean, or null.

Form Event

Track a form submission.

{
  "type": "form",
  "url": "https://example.com/contact",
  "path": "/contact",
  "formId": "contact-form",
  "formFields": {
    "email": "jane@example.com",
    "name": "Jane Doe",
    "company": "Acme Inc",
    "message": "I'd like to learn more..."
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "form".

formId

string

Identifier for the form (ID attribute or name).

formFields

object

Key-value pairs of form field values.

Sensitive fields (password, credit_card, ssn, etc.) are automatically stripped on the server. Don’t send them.

Identify Event

Identify the visitor with their email/userId.

{
  "type": "identify",
  "url": "https://example.com/signup",
  "path": "/signup",
  "email": "jane@example.com",
  "userId": "usr_12345",
  "customerId": "cust_123",
  "traits": {
    "name": "Jane Doe",
    "company": "Acme Inc",
    "plan": "enterprise",
    "role": "admin"
  },
  "customerTraits": {
    "plan": "enterprise",
    "seats": 50
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "identify".

string

User’s email address. At least one of email or userId required.

userId

string

Your system-owned user/contact ID.

traits

object

Properties to set on the user profile.

customerId

string

Your system-owned customer/account/workspace ID. Send it with an identify event when you want that external account/workspace to link to the contact resolved from email or userId.

customerTraits

object

Properties to set on the customer profile.

Engagement Event

Track active time on a page. Automatically sent by the browser SDK.

{
  "type": "engagement",
  "url": "https://example.com/features",
  "path": "/features",
  "activeTimeMs": 45000,
  "totalTimeMs": 60000,
  "sessionId": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
  "timestamp": 1699999999999
}

type

string

required

Must be "engagement".

activeTimeMs

number

required

Time in milliseconds the user was actively engaged (visible tab + user interactions).

totalTimeMs

number

required

Total wall-clock time in milliseconds on the page.

sessionId

string

required

Session ID (UUID) for grouping engagement events. Resets after 30 min of inactivity or tab close.

Calendar Event

Track calendar booking from embedded widgets (Cal.com, Calendly).

{
  "type": "calendar",
  "url": "https://example.com/demo",
  "path": "/demo",
  "provider": "cal.com",
  "eventType": "30 Minute Demo",
  "startTime": "2024-03-15T10:00:00Z",
  "endTime": "2024-03-15T10:30:00Z",
  "duration": 30,
  "isRecurring": false,
  "timestamp": 1699999999999
}

type

string

required

Must be "calendar".

provider

string

required

Calendar provider: "cal.com", "calendly", or "unknown".

eventType

string

Meeting type name (e.g., “30 Minute Demo”).

startTime

string

Scheduled start time (ISO 8601 format).

endTime

string

Scheduled end time (ISO 8601 format).

duration

number

Duration in minutes.

isRecurring

boolean

Whether this is a recurring meeting.

inviteeEmail

string

Invitee’s email (only available via server-side webhooks).

inviteeName

string

Invitee’s name (only available via server-side webhooks).

Stage Event

Track explicit activation milestones. Engaged and Inactive are derived automatically from tracked product activity, but the ingest API continues to accept those values for older SDKs and direct API callers.

{
  "type": "stage",
  "url": "https://example.com/onboarding",
  "path": "/onboarding",
  "stage": "activated",
  "properties": {
    "flow": "onboarding",
    "step": "completed"
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "stage".

stage

string

required

The journey stage. Use "activated" for new integrations. "engaged" and "inactive" remain accepted for compatibility.

properties

object

Additional context for the stage transition.

The discovered and signed_up stages are automatically inferred from identify events. Only use stage events for explicit activation milestone tracking.

Billing Event

Track account billing status for custom billing systems. If Stripe is connected, billing status is handled automatically.

{
  "type": "billing",
  "url": "server://cust_123",
  "path": "/",
  "status": "paid",
  "customerId": "cust_123",
  "properties": {
    "plan": "pro",
    "amount": 99
  },
  "timestamp": 1699999999999
}

type

string

required

Must be "billing".

status

string

required

The billing status. One of: "trialing", "paid", "churned".

customerId

string

Your system-owned customer/account/workspace ID. Public billing calls should use this identifier.

stripeCustomerId

string

Stripe customer identifier. Prefer customerId unless you are sending compatibility events that already use Stripe IDs.

properties

object

Additional billing context such as plan, amount, or cancellation reason.

Billing events require customerId or stripeCustomerId. They target the account, not an individual contact.

Response

Success Response

{
  "success": true,
  "processed": 3
}

success

boolean

Whether the request was successful.

processed

number

Number of events successfully processed.

errors

array

Array of processing errors (only present if some events failed).

Partial Success Response (HTTP 207)

When some events succeed and others fail:

{
  "success": false,
  "processed": 2,
  "errors": [
    {
      "index": 2,
      "message": "Invalid event type"
    }
  ]
}

Error Response

{
  "success": false,
  "processed": 0,
  "errors": [
    {
      "index": -1,
      "message": "Invalid or inactive tracking configuration"
    }
  ]
}

Examples

cURL - Browser Events

curl -X POST "https://app.outlit.ai/api/i/v1/pk_your_key/events" \
  -H "Content-Type: application/json" \
  -d '{
    "visitorId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "source": "client",
    "events": [
      {
        "type": "pageview",
        "url": "https://example.com/pricing",
        "path": "/pricing",
        "title": "Pricing",
        "timestamp": 1699999999999
      }
    ]
  }'

cURL - Server Events

curl -X POST "https://app.outlit.ai/api/i/v1/pk_your_key/events" \
  -H "Content-Type: application/json" \
  -d '{
    "source": "server",
    "events": [
      {
        "type": "identify",
        "url": "server://jane@acme.com",
        "path": "/",
        "email": "jane@acme.com",
        "userId": "usr_123",
        "customerId": "cust_123",
        "traits": {
          "name": "Jane Doe",
          "plan": "pro"
        },
        "customerTraits": {
          "plan": "pro"
        }
      },
      {
        "type": "custom",
        "url": "server://jane@acme.com",
        "path": "/",
        "eventName": "subscription_created",
        "email": "jane@acme.com",
        "userId": "usr_123",
        "customerId": "cust_123",
        "properties": {
          "plan": "pro",
          "amount": 99
        }
      }
    ]
  }'

JavaScript (fetch)

const response = await fetch(
  'https://app.outlit.ai/api/i/v1/pk_your_key/events',
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      visitorId: 'visitor-123',
      source: 'client',
      events: [
        {
          type: 'pageview',
          url: window.location.href,
          path: window.location.pathname,
          title: document.title,
          timestamp: Date.now()
        }
      ]
    })
  }
)

const result = await response.json()
console.log(result)

Python

import requests
import time

response = requests.post(
    'https://app.outlit.ai/api/i/v1/pk_your_key/events',
    json={
        'source': 'server',
        'events': [
            {
                'type': 'identify',
                'url': 'server://jane@example.com',
                'path': '/',
                'email': 'jane@example.com',
                'customerId': 'cust_123',
                'traits': {'name': 'Jane Doe'},
                'customerTraits': {'plan': 'enterprise'},
                'timestamp': int(time.time() * 1000)
            }
        ]
    }
)

print(response.json())

Server-Side Events

For server-side tracking, the visitorId field can be omitted. Identity is resolved from the event data, including customer-only attribution when customerId is provided:

Identify events: Use email and/or userId fields, plus optional customer context
Custom events: Include top-level email, userId, fingerprint, and/or customerId fields
Billing events: Include customerId or stripeCustomerId

{
  "source": "server",
  "events": [
    {
      "type": "custom",
      "url": "server://user@example.com",
      "path": "/",
      "eventName": "payment_received",
      "email": "user@example.com",
      "userId": "usr_123",
      "customerId": "cust_123",
      "properties": {
        "amount": 99,
        "currency": "USD"
      }
    }
  ]
}

Server events require identity or account attribution. Custom events need at least one of email, userId, fingerprint, or customerId; identify events need email or userId; billing events need customerId or stripeCustomerId.

Batching Best Practices

For high-volume tracking:

Batch events - Send multiple events per request (up to 100)
Use background queue - Don’t block user actions
Retry with backoff - Handle temporary failures
Flush on shutdown - Send remaining events before exit

// Example batching implementation
const eventQueue = []
const FLUSH_INTERVAL = 5000
const MAX_BATCH_SIZE = 100

function track(event) {
  eventQueue.push({ ...event, timestamp: Date.now() })
  
  if (eventQueue.length >= MAX_BATCH_SIZE) {
    flush()
  }
}

async function flush() {
  if (eventQueue.length === 0) return
  
  const events = eventQueue.splice(0, MAX_BATCH_SIZE)
  
  try {
    await fetch('/api/i/v1/pk_xxx/events', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        visitorId: getVisitorId(),
        source: 'client',
        events
      })
    })
  } catch (error) {
    // Re-queue failed events
    eventQueue.unshift(...events)
  }
}

setInterval(flush, FLUSH_INTERVAL)
window.addEventListener('beforeunload', flush)

Integration Routes

​Endpoint

​Path Parameters

​Request Body

​Body Parameters

​Event Types

​UTM Parameters

​Pageview Event

​Custom Event

​Form Event

​Identify Event

​Engagement Event

​Calendar Event

​Stage Event

​Billing Event

​Response

​Success Response

​Partial Success Response (HTTP 207)

​Error Response

​Examples

​cURL - Browser Events

​cURL - Server Events

​JavaScript (fetch)

​Python

​Server-Side Events

​Batching Best Practices

Endpoint

Path Parameters

Request Body

Body Parameters

Event Types

UTM Parameters

Pageview Event

Custom Event

Form Event

Identify Event

Engagement Event

Calendar Event

Stage Event

Billing Event

Response

Success Response

Partial Success Response (HTTP 207)

Error Response

Examples

cURL - Browser Events

cURL - Server Events

JavaScript (fetch)

Python

Server-Side Events

Batching Best Practices