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POST
/
contact-properties
curl --request POST \
  --url https://api.autosend.com/v1/contact-properties \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "name": "company",
    "type": "string"
  }'
import requests

url = "https://api.autosend.com/v1/contact-properties"

headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

payload = {
    "name": "company",
    "type": "string"
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())
const response = await fetch("https://api.autosend.com/v1/contact-properties", {
  method: "POST",
  headers: {
    Authorization: "Bearer <token>",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    name: "company",
    type: "string",
  }),
});

const data = await response.json();
console.log(data);
<?php
$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.autosend.com/v1/contact-properties",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => json_encode([
    "name" => "company",
    "type" => "string",
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
  ],
]);

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

echo $response;
package main

import (
  "bytes"
  "encoding/json"
  "fmt"
  "net/http"
  "io/ioutil"
)

func main() {
  payload, _ := json.Marshal(map[string]string{
    "name": "company",
    "type": "string",
  })

  req, _ := http.NewRequest("POST", "https://api.autosend.com/v1/contact-properties", bytes.NewBuffer(payload))
  req.Header.Set("Authorization", "Bearer <token>")
  req.Header.Set("Content-Type", "application/json")

  client := &http.Client{}
  resp, _ := client.Do(req)
  defer resp.Body.Close()

  body, _ := ioutil.ReadAll(resp.Body)
  fmt.Println(string(body))
}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
  public static void main(String[] args) throws Exception {
    HttpClient client = HttpClient.newHttpClient();

    String body = """
      {
        "name": "company",
        "type": "string"
      }
      """;

    HttpRequest request = HttpRequest.newBuilder()
      .uri(URI.create("https://api.autosend.com/v1/contact-properties"))
      .header("Authorization", "Bearer <token>")
      .header("Content-Type", "application/json")
      .POST(HttpRequest.BodyPublishers.ofString(body))
      .build();

    HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
    System.out.println(response.body());
  }
}
require "net/http"
require "uri"
require "json"

uri = URI.parse("https://api.autosend.com/v1/contact-properties")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri)
request["Authorization"] = "Bearer <token>"
request["Content-Type"] = "application/json"
request.body = JSON.dump({
  name: "company",
  type: "string"
})

response = http.request(request)
puts response.body
{
  "success": true,
  "message": "Contact property created successfully",
  "data": {
    "id": "6960953e729f65f154369408",
    "name": "company",
    "type": "string",
    "fieldName": "company",
    "fieldType": "string",
    "createdAt": "2026-01-09T05:42:22.171Z",
    "updatedAt": "2026-01-09T05:42:22.171Z"
  }
}
curl --request POST \
  --url https://api.autosend.com/v1/contact-properties \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "name": "company",
    "type": "string"
  }'
import requests

url = "https://api.autosend.com/v1/contact-properties"

headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

payload = {
    "name": "company",
    "type": "string"
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())
const response = await fetch("https://api.autosend.com/v1/contact-properties", {
  method: "POST",
  headers: {
    Authorization: "Bearer <token>",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    name: "company",
    type: "string",
  }),
});

const data = await response.json();
console.log(data);
<?php
$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.autosend.com/v1/contact-properties",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => json_encode([
    "name" => "company",
    "type" => "string",
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
  ],
]);

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

echo $response;
package main

import (
  "bytes"
  "encoding/json"
  "fmt"
  "net/http"
  "io/ioutil"
)

func main() {
  payload, _ := json.Marshal(map[string]string{
    "name": "company",
    "type": "string",
  })

  req, _ := http.NewRequest("POST", "https://api.autosend.com/v1/contact-properties", bytes.NewBuffer(payload))
  req.Header.Set("Authorization", "Bearer <token>")
  req.Header.Set("Content-Type", "application/json")

  client := &http.Client{}
  resp, _ := client.Do(req)
  defer resp.Body.Close()

  body, _ := ioutil.ReadAll(resp.Body)
  fmt.Println(string(body))
}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
  public static void main(String[] args) throws Exception {
    HttpClient client = HttpClient.newHttpClient();

    String body = """
      {
        "name": "company",
        "type": "string"
      }
      """;

    HttpRequest request = HttpRequest.newBuilder()
      .uri(URI.create("https://api.autosend.com/v1/contact-properties"))
      .header("Authorization", "Bearer <token>")
      .header("Content-Type", "application/json")
      .POST(HttpRequest.BodyPublishers.ofString(body))
      .build();

    HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
    System.out.println(response.body());
  }
}
require "net/http"
require "uri"
require "json"

uri = URI.parse("https://api.autosend.com/v1/contact-properties")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri)
request["Authorization"] = "Bearer <token>"
request["Content-Type"] = "application/json"
request.body = JSON.dump({
  name: "company",
  type: "string"
})

response = http.request(request)
puts response.body
{
  "success": true,
  "message": "Contact property created successfully",
  "data": {
    "id": "6960953e729f65f154369408",
    "name": "company",
    "type": "string",
    "fieldName": "company",
    "fieldType": "string",
    "createdAt": "2026-01-09T05:42:22.171Z",
    "updatedAt": "2026-01-09T05:42:22.171Z"
  }
}

Authorizations

Authorizations
string | header
required
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body Parameters

name
string
required
The programmatic name for the contact property. Must be unique within the project. Cannot be one of the reserved names: firstName, first_name, lastName, last_name, email, mobile, unsubscribed, unsubscribe, unsubscribe_groups, unsubscribe_preferences, userId, externalId, createdAt, updatedAt, contactLists, address, address_line_1, address_line_2, city, state, zip, country.The legacy fieldName parameter is still accepted as an alias for name.
type
string
required
The data type of the contact property. Must be one of: string, number, boolean, date.The legacy fieldType parameter is still accepted as an alias for type.
description
string
A human-readable description of what the property represents.
defaultValue
string
A fallback value used when a contact does not have an explicit value for this property.

Response

Contact property created successfully
success
boolean
Indicates whether the request was successful.
message
string
Confirmation message.Example: "Contact property created successfully"
data
object
The created contact property.