Create Member by Customer External ID

from polar.v2027_01 import Polar

polar = Polar("polar_oat_xxx")

response = polar.customers.members.create_external(
    'string',
    email='[email protected]',
    external_id='usr_1337',
    role='member',
)
print(response)

import { createPolar } from "@polar-sh/sdk/2027-01";

const polar = createPolar({
  accessToken: "polar_oat_xxx",
});

const response = await polar.customers.members.createExternal(
  "string",
  {
    "email": "[email protected]",
    "external_id": "usr_1337",
    "role": "member"
  },
);
console.log(response);

curl --request POST \
  --url https://api.polar.sh/v1/customers/external/{external_id}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "[email protected]",
  "name": "Jane Doe",
  "external_id": "usr_1337",
  "role": "member"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    email: '[email protected]',
    name: 'Jane Doe',
    external_id: 'usr_1337',
    role: 'member'
  })
};

fetch('https://api.polar.sh/v1/customers/external/{external_id}/members', 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://api.polar.sh/v1/customers/external/{external_id}/members",
  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([
    'email' => '[email protected]',
    'name' => 'Jane Doe',
    'external_id' => 'usr_1337',
    'role' => 'member'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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://api.polar.sh/v1/customers/external/{external_id}/members"

	payload := strings.NewReader("{\n  \"email\": \"[email protected]\",\n  \"name\": \"Jane Doe\",\n  \"external_id\": \"usr_1337\",\n  \"role\": \"member\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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://api.polar.sh/v1/customers/external/{external_id}/members")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"email\": \"[email protected]\",\n  \"name\": \"Jane Doe\",\n  \"external_id\": \"usr_1337\",\n  \"role\": \"member\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.polar.sh/v1/customers/external/{external_id}/members")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"email\": \"[email protected]\",\n  \"name\": \"Jane Doe\",\n  \"external_id\": \"usr_1337\",\n  \"role\": \"member\"\n}"

response = http.request(request)
puts response.read_body

{
  "id": "<string>",
  "created_at": "2026-01-01T00:00:00.000000Z",
  "modified_at": "2026-01-01T00:00:00.000000Z",
  "customer_id": "<string>",
  "email": "[email protected]",
  "name": "Jane Doe",
  "external_id": "usr_1337",
  "role": "owner"
}

{
  "error": "NotPermitted",
  "detail": "<string>"
}

{
  "error": "ResourceNotFound",
  "detail": "<string>"
}

{
  "error": "AmbiguousExternalCustomerID",
  "detail": "<string>"
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}