Create Server-Side Lead

curl -X POST https://app.leadtrackr.io/api/leads/createServerSideLead \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-api-key-here" \
  -d '{
    "projectId": "your-project-id",
    "userData": {
      "firstName": "Jane",
      "lastName": "Smith",
      "email": "jane@example.com",
      "phone": "+31687654321",
      "companyName": "Acme Inc."
    },
    "attributionData": {
      "gclid": "xyz789",
      "cid": "9876543210.9876543210",
      "fbp": "fb.1.1612345678.9876543210"
    },
    "formData": {
      "formName": "Contact Form",
      "formMessage": "Interested in your services",
      "uniqueEventId": "evt_xyz789"
    },
    "deviceData": {
      "ipAddress": "203.0.113.50",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)"
    },
    "uniqueIdentifier": "crm-lead-789"
  }'

const response = await fetch("https://app.leadtrackr.io/api/leads/createServerSideLead", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": "your-api-key-here"
  },
  body: JSON.stringify({
    projectId: "your-project-id",
    userData: {
      firstName: "Jane",
      lastName: "Smith",
      email: "jane@example.com",
      phone: "+31687654321",
      companyName: "Acme Inc."
    },
    attributionData: {
      gclid: "xyz789",
      cid: "9876543210.9876543210"
    },
    formData: {
      formName: "Contact Form",
      uniqueEventId: "evt_xyz789"
    },
    uniqueIdentifier: "crm-lead-789"
  })
});

const data = await response.json();
console.log(data);

$ch = curl_init("https://app.leadtrackr.io/api/leads/createServerSideLead");

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        "Content-Type: application/json",
        "X-API-Key: your-api-key-here"
    ],
    CURLOPT_POSTFIELDS => json_encode([
        "projectId" => "your-project-id",
        "userData" => [
            "firstName" => "Jane",
            "lastName" => "Smith",
            "email" => "jane@example.com",
            "phone" => "+31687654321",
            "companyName" => "Acme Inc."
        ],
        "attributionData" => [
            "gclid" => "xyz789",
            "cid" => "9876543210.9876543210"
        ],
        "formData" => [
            "formName" => "Contact Form",
            "uniqueEventId" => "evt_xyz789"
        ],
        "uniqueIdentifier" => "crm-lead-789"
    ])
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

{
  "message": "Lead created successfully",
  "leadId": 43,
  "uniqueIdentifier": "crm-lead-789"
}

POST

api

leads

createServerSideLead

curl -X POST https://app.leadtrackr.io/api/leads/createServerSideLead \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-api-key-here" \
  -d '{
    "projectId": "your-project-id",
    "userData": {
      "firstName": "Jane",
      "lastName": "Smith",
      "email": "jane@example.com",
      "phone": "+31687654321",
      "companyName": "Acme Inc."
    },
    "attributionData": {
      "gclid": "xyz789",
      "cid": "9876543210.9876543210",
      "fbp": "fb.1.1612345678.9876543210"
    },
    "formData": {
      "formName": "Contact Form",
      "formMessage": "Interested in your services",
      "uniqueEventId": "evt_xyz789"
    },
    "deviceData": {
      "ipAddress": "203.0.113.50",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)"
    },
    "uniqueIdentifier": "crm-lead-789"
  }'

const response = await fetch("https://app.leadtrackr.io/api/leads/createServerSideLead", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": "your-api-key-here"
  },
  body: JSON.stringify({
    projectId: "your-project-id",
    userData: {
      firstName: "Jane",
      lastName: "Smith",
      email: "jane@example.com",
      phone: "+31687654321",
      companyName: "Acme Inc."
    },
    attributionData: {
      gclid: "xyz789",
      cid: "9876543210.9876543210"
    },
    formData: {
      formName: "Contact Form",
      uniqueEventId: "evt_xyz789"
    },
    uniqueIdentifier: "crm-lead-789"
  })
});

const data = await response.json();
console.log(data);

$ch = curl_init("https://app.leadtrackr.io/api/leads/createServerSideLead");

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        "Content-Type: application/json",
        "X-API-Key: your-api-key-here"
    ],
    CURLOPT_POSTFIELDS => json_encode([
        "projectId" => "your-project-id",
        "userData" => [
            "firstName" => "Jane",
            "lastName" => "Smith",
            "email" => "jane@example.com",
            "phone" => "+31687654321",
            "companyName" => "Acme Inc."
        ],
        "attributionData" => [
            "gclid" => "xyz789",
            "cid" => "9876543210.9876543210"
        ],
        "formData" => [
            "formName" => "Contact Form",
            "uniqueEventId" => "evt_xyz789"
        ],
        "uniqueIdentifier" => "crm-lead-789"
    ])
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

{
  "message": "Lead created successfully",
  "leadId": 43,
  "uniqueIdentifier": "crm-lead-789"
}

This endpoint is designed for server-side integrations. It requires an API key sent via the X-API-Key header. If a lead with the same uniqueEventId already exists, it will be updated instead of duplicated.

Request body

string

required

The public ID of the project to create the lead in. You can find this in the LeadTrackr Dashboard under Settings.

object

required

Contact information for the lead.

Show userData properties

string

First name

string

Last name

string

Email address

string

Phone number (including country code, e.g. +31612345678)

string

Company name

object

Attribution and tracking data. At least one of userData or attributionData must contain data.

Show attributionData properties

string

Google Click ID

string

Google Web-to-App Broad ID

string

Google Analytics Client ID (e.g. 1234567890.1234567890)

string

Google Analytics Session ID

string

Facebook Browser ID (_fbp cookie value)

string

Facebook Click ID (_fbc cookie value)

object

Form submission data. You can include any additional custom fields — they are stored as-is.

Show formData properties

string

Name of the form (e.g. "Contact Form", "Quote Request")

string

Message or description submitted with the form

string

Unique identifier to deduplicate submissions. If a lead with the same uniqueEventId already exists in the project, the existing lead is updated instead of creating a duplicate.

Any additional fields you include (e.g. formCustomField1, campaign, source) are passed through and stored as-is.

object

Device and browser information. Used to improve attribution accuracy for GA4 and Meta integrations.

Show deviceData properties

string

IP address of the user

string

Browser user agent string

string

Channel flow tracking value (UTM journey). Also accepted as lt_channelflow.

string

A user-provided identifier to link this lead to your own system (e.g. your CRM lead ID or form submission ID). Max 255 characters. Also accepted as unique_identifier.

Response

string

A description of the result. Either "Lead created successfully" or "Lead updated successfully".

number

The ID of the created or updated lead.

string | null

The unique identifier for the lead, or null if not provided.

curl -X POST https://app.leadtrackr.io/api/leads/createServerSideLead \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-api-key-here" \
  -d '{
    "projectId": "your-project-id",
    "userData": {
      "firstName": "Jane",
      "lastName": "Smith",
      "email": "jane@example.com",
      "phone": "+31687654321",
      "companyName": "Acme Inc."
    },
    "attributionData": {
      "gclid": "xyz789",
      "cid": "9876543210.9876543210",
      "fbp": "fb.1.1612345678.9876543210"
    },
    "formData": {
      "formName": "Contact Form",
      "formMessage": "Interested in your services",
      "uniqueEventId": "evt_xyz789"
    },
    "deviceData": {
      "ipAddress": "203.0.113.50",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)"
    },
    "uniqueIdentifier": "crm-lead-789"
  }'

const response = await fetch("https://app.leadtrackr.io/api/leads/createServerSideLead", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": "your-api-key-here"
  },
  body: JSON.stringify({
    projectId: "your-project-id",
    userData: {
      firstName: "Jane",
      lastName: "Smith",
      email: "jane@example.com",
      phone: "+31687654321",
      companyName: "Acme Inc."
    },
    attributionData: {
      gclid: "xyz789",
      cid: "9876543210.9876543210"
    },
    formData: {
      formName: "Contact Form",
      uniqueEventId: "evt_xyz789"
    },
    uniqueIdentifier: "crm-lead-789"
  })
});

const data = await response.json();
console.log(data);

$ch = curl_init("https://app.leadtrackr.io/api/leads/createServerSideLead");

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        "Content-Type: application/json",
        "X-API-Key: your-api-key-here"
    ],
    CURLOPT_POSTFIELDS => json_encode([
        "projectId" => "your-project-id",
        "userData" => [
            "firstName" => "Jane",
            "lastName" => "Smith",
            "email" => "jane@example.com",
            "phone" => "+31687654321",
            "companyName" => "Acme Inc."
        ],
        "attributionData" => [
            "gclid" => "xyz789",
            "cid" => "9876543210.9876543210"
        ],
        "formData" => [
            "formName" => "Contact Form",
            "uniqueEventId" => "evt_xyz789"
        ],
        "uniqueIdentifier" => "crm-lead-789"
    ])
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

{
  "message": "Lead created successfully",
  "leadId": 43,
  "uniqueIdentifier": "crm-lead-789"
}

Overview

Leads

Create Server-Side Lead

Request body

Response

​Request body

​Response

Request body

Response