curl --request POST \
  --url https://api.privy.io/v1/users/{user_id}/custom_metadata \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'privy-app-id: <privy-app-id>' \
  --data '
{
  "custom_metadata": {
    "key": "value"
  }
}
'

HttpResponse<String> response = Unirest.post("https://api.privy.io/v1/users/{user_id}/custom_metadata")
  .header("privy-app-id", "<privy-app-id>")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"custom_metadata\": {\n    \"key\": \"value\"\n  }\n}")
  .asString();

const options = {
  method: 'POST',
  headers: {
    'privy-app-id': '<privy-app-id>',
    Authorization: 'Basic <encoded-value>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({custom_metadata: {key: 'value'}})
};

fetch('https://api.privy.io/v1/users/{user_id}/custom_metadata', 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.privy.io/v1/users/{user_id}/custom_metadata",
  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([
    'custom_metadata' => [
        'key' => 'value'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json",
    "privy-app-id: <privy-app-id>"
  ],
]);

$response = curl_exec($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.privy.io/v1/users/{user_id}/custom_metadata"

	payload := strings.NewReader("{\n  \"custom_metadata\": {\n    \"key\": \"value\"\n  }\n}")

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

	req.Header.Add("privy-app-id", "<privy-app-id>")
	req.Header.Add("Authorization", "Basic <encoded-value>")
	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))

}

{
  "id": "did:privy:cm3np4u9j001rc8b73seqmqqk",
  "created_at": 1731974895,
  "linked_accounts": [
    {
      "address": "[email protected]",
      "type": "email",
      "first_verified_at": 1674788927,
      "latest_verified_at": 1674788927,
      "verified_at": 1674788927
    },
    {
      "type": "farcaster",
      "fid": 4423,
      "owner_address": "0xE6bFb4137F3A8C069F98cc775f324A84FE45FdFF",
      "username": "payton",
      "display_name": "payton ↑",
      "bio": "engineering at /privy. building pixelpool.xyz, the first Farcaster video client. nyc. 👨‍💻🍎🏳️‍🌈  nf.td/payton",
      "profile_picture": "https://supercast.mypinata.cloud/ipfs/QmNexfCxdnFzWdJqKVgrjd27UGLMexNaw5FXu1XKR3cQF7?filename=IMG_2799.png",
      "profile_picture_url": "https://supercast.mypinata.cloud/ipfs/QmNexfCxdnFzWdJqKVgrjd27UGLMexNaw5FXu1XKR3cQF7?filename=IMG_2799.png",
      "verified_at": 1740678402,
      "first_verified_at": 1740678402,
      "latest_verified_at": 1741194370
    },
    {
      "type": "passkey",
      "credential_id": "Il5vP-3Tm3hNmDVBmDlREgXzIOJnZEaiVnT-XMliXe-BufP9GL1-d3qhozk9IkZwQ_",
      "authenticator_name": "1Password",
      "public_key": "pQECAyYgASFYIKdGwx5XxZ/7CJJzT8d5L6jyLNQdTH7X+rSZdPJ9Ux/QIlggRm4OcJ8F3aB5zYz3T9LxLdDfGpWvYkHgS4A8tPz9CqE=",
      "created_with_browser": "Chrome",
      "created_with_os": "Mac OS",
      "created_with_device": "Macintosh",
      "enrolled_in_mfa": true,
      "verified_at": 1741194420,
      "first_verified_at": 1741194420,
      "latest_verified_at": 1741194420
    }
  ],
  "mfa_methods": [
    {
      "type": "passkey",
      "verified_at": 1741194420
    }
  ],
  "has_accepted_terms": true,
  "is_guest": false
}