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POST
/
track
Track Events
curl --request POST \
  --url https://{region}.mixpanel.com/track \
  --header 'Content-Type: application/json' \
  --data '
[
  {
    "event": "<string>",
    "properties": {
      "token": "<string>",
      "time": 123,
      "distinct_id": "<string>",
      "$insert_id": "<string>"
    }
  }
]
'
import requests

url = "https://{region}.mixpanel.com/track"

payload = [
    {
        "event": "<string>",
        "properties": {
            "token": "<string>",
            "time": 123,
            "distinct_id": "<string>",
            "$insert_id": "<string>"
        }
    }
]
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify([
    {
      event: '<string>',
      properties: {token: '<string>', time: 123, distinct_id: '<string>', $insert_id: '<string>'}
    }
  ])
};

fetch('https://{region}.mixpanel.com/track', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{region}.mixpanel.com/track",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    [
        'event' => '<string>',
        'properties' => [
                'token' => '<string>',
                'time' => 123,
                'distinct_id' => '<string>',
                '$insert_id' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://{region}.mixpanel.com/track"

	payload := strings.NewReader("[\n  {\n    \"event\": \"<string>\",\n    \"properties\": {\n      \"token\": \"<string>\",\n      \"time\": 123,\n      \"distinct_id\": \"<string>\",\n      \"$insert_id\": \"<string>\"\n    }\n  }\n]")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
HttpResponse<String> response = Unirest.post("https://{region}.mixpanel.com/track")
  .header("Content-Type", "application/json")
  .body("[\n  {\n    \"event\": \"<string>\",\n    \"properties\": {\n      \"token\": \"<string>\",\n      \"time\": 123,\n      \"distinct_id\": \"<string>\",\n      \"$insert_id\": \"<string>\"\n    }\n  }\n]")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://{region}.mixpanel.com/track")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "[\n  {\n    \"event\": \"<string>\",\n    \"properties\": {\n      \"token\": \"<string>\",\n      \"time\": 123,\n      \"distinct_id\": \"<string>\",\n      \"$insert_id\": \"<string>\"\n    }\n  }\n]"

response = http.request(request)
puts response.read_body
1
Track events to Mixpanel from client devices. We recommend using one of our client-side SDKs instead of using /track directly, as our SDKs provide queueing, retrying, batching, and more.

​
When to use /track vs /import

Typically, we recommend using /import for server-side integrations as it is more scalable and supports ingesting historical data. We only recommend /track for client-side tracking in an environment for which we don’t have SDK support or if you’re sending data via some other untrusted environment (eg: third-party webhooks that send data to Mixpanel).
/track/import
Events per request20002000
AuthenticationProject Token, intended for untrusted clients.Project Secret/Service Account, intended for server-side integration.
CompressionGzip allowedGzip allowed
Content-Typeapplication/x-www-form-urlencodedapplication/json or application/x-ndjson
Ingesting historical eventsLast 5 days only.Any time after 1971-01-01.

​
Limits

The limits for track are the same as /import, see here. Each event has the following size limits:
  • Must be smaller than 1MB of uncompressed JSON.
  • Must have fewer than 255 properties.
  • All nested object properties must have fewer than 255 keys and max nesting depth is 3.
  • All array properties must have fewer than 255 elements.
To ensure real-time ingestion and quality-of-service, we have a rate limit of 2GB of uncompressed JSON/minute or ~30k events per second, measured on a rolling 1 minute basis. We recommend the following when it comes to sending data to our API at scale:
  • Send data as quickly as possible with concurrent clients until the server returns 429. We see the best results with 10-20 concurrent clients sending 2K events per batch.
  • When you see 429s, employ an exponential backoff with jitter strategy. We recommend starting with a backoff of 2s and doubling backoff until 60s, with 1-5s of jitter.
  • We recommend gzip compression and using Content-Encoding: gzip to reduce network egress and transfer time.
  • In the rare event that our API returns a 502 or 503 status code, we recommend employing the same exponential backoff strategy as with 429s.
  • Please do not retry validation errors (400 status code), as they will consistently fail and count toward the rate limit.
If you are an Enterprise customer that requires a higher rate limit, please reach out to your CSM with your project_id and use case.

Query Parameters

​
ip
integer

If present and equal to 1, Mixpanel will use the ip address of the incoming request and compute a distinct_id using a hash function if no distinct_id is provided. This is different from providing a properties.ip value in the Event Object.

Required range: 0 <= x <= 1
​
verbose
integer

If present and equal to 1, Mixpanel will respond with a JSON Object describing the success or failure of the tracking call. The returned object will have two keys: status, with the value 1 on success and 0 on failure, and error, with a string-valued error message if the request wasn't successful. This is useful for debugging during implementation.

Required range: 0 <= x <= 1
​
img
integer

If present and equal to 1, Mixpanel will serve a 1x1 transparent pixel image as a response to the request. This is useful for adding Pixel Tracking in places that javascript is not supported.

Required range: 0 <= x <= 1
​
callback
string

If present, Mixpanel will return a content-type: text/javascript with a body that calls a function by value provided. This is useful for creating local callbacks to a successful track call in JavaScript.

Body

application/json
Minimum array length: 1
​
event
string
required

The name of the event.

​
properties
properties · object
required

A JSON object containing properties of the event.

Response

  • 1 - One or more objects provided are valid. This does not signify a valid project token or secret.
  • 0 - No data objects in the body are valid.

The response is of type enum<integer>.

Available options:
1,
0