curl --request PATCH \
  --url https://brew.new/api/v1/contacts/{email} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fields": {
    "firstName": "Janet",
    "plan": "scale"
  }
}
'

import requests

url = "https://brew.new/api/v1/contacts/{email}"

payload = { "fields": {
        "firstName": "Janet",
        "plan": "scale"
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({fields: {firstName: 'Janet', plan: 'scale'}})
};

fetch('https://brew.new/api/v1/contacts/{email}', 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://brew.new/api/v1/contacts/{email}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'fields' => [
        'firstName' => 'Janet',
        'plan' => 'scale'
    ]
  ]),
  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://brew.new/api/v1/contacts/{email}"

	payload := strings.NewReader("{\n  \"fields\": {\n    \"firstName\": \"Janet\",\n    \"plan\": \"scale\"\n  }\n}")

	req, _ := http.NewRequest("PATCH", 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.patch("https://brew.new/api/v1/contacts/{email}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fields\": {\n    \"firstName\": \"Janet\",\n    \"plan\": \"scale\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://brew.new/api/v1/contacts/{email}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fields\": {\n    \"firstName\": \"Janet\",\n    \"plan\": \"scale\"\n  }\n}"

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

{
  "contact": {
    "email": "jane@example.com",
    "firstName": "Janet",
    "lastName": "Doe",
    "subscribed": true,
    "validationStatus": "valid",
    "verificationStatus": "valid",
    "suppressed": false,
    "suppressedReason": null,
    "createdAt": "2026-04-08T12:00:00.000Z",
    "updatedAt": "2026-04-08T12:05:00.000Z",
    "importId": null,
    "customFields": {
      "plan": "enterprise",
      "revenue": 4200
    }
  },
  "updated": [
    "firstName",
    "plan"
  ]
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "type": "invalid_request",
    "message": "Request validation failed.",
    "suggestion": "Fix the field reported in `param` and retry.",
    "docs": "https://docs.brew.new/api-reference/api/errors",
    "param": "fields"
  }
}

{
  "error": {
    "code": "INVALID_API_KEY",
    "type": "authentication_error",
    "message": "The provided API key is invalid.",
    "suggestion": "Check the API key format and retry with a valid active key.",
    "docs": "https://docs.brew.new/api-reference/api/authentication"
  }
}

{
  "error": {
    "code": "INSUFFICIENT_PERMISSIONS",
    "type": "authorization_error",
    "message": "The caller does not have the required permission.",
    "suggestion": "Use an API key or session with the required permission.",
    "docs": "https://docs.brew.new/api-reference/api/authentication",
    "param": "contacts"
  }
}

{
  "error": {
    "code": "CONTACT_NOT_FOUND",
    "type": "not_found",
    "message": "No contact exists with email 'jane@example.com'.",
    "suggestion": "Upsert the contact first with POST /v1/contacts.",
    "docs": "https://docs.brew.new/api-reference/api/errors",
    "param": "email"
  }
}

{
  "error": {
    "code": "CORE_FIELD_IMMUTABLE",
    "type": "invalid_request",
    "message": "Core field 'createdAt' cannot be modified.",
    "suggestion": "Remove the read-only field from `fields`.",
    "docs": "https://docs.brew.new/api-reference/api/errors",
    "param": "fields.createdAt"
  }
}

{
  "error": {
    "code": "RATE_LIMITED",
    "type": "rate_limit",
    "message": "Too many requests.",
    "suggestion": "Wait for the retry window before sending another request.",
    "docs": "https://docs.brew.new/api-reference/api/rate-limits",
    "retryAfter": 42
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "type": "internal_error",
    "message": "An unexpected error occurred.",
    "suggestion": "Retry the request. If it keeps failing, contact support.",
    "docs": "https://docs.brew.new/api-reference/api/errors"
  }
}