anthropic-ai / sdk

v1.4.0 2026-11-02 19:07 UTC

Requires

• php: ^8.1
• open-telemetry/api: ^1.0
• php-http/discovery: ^1
• psr/http-client: ^1
• psr/http-client-implementation: ^1
• psr/http-factory-implementation: ^1
• psr/http-message: ^1|^2
• standard-webhooks/standard-webhooks: ^1

Requires (Dev)

• aws/aws-sdk-php: ^3.368
• friendsofphp/php-cs-fixer: ^3
• google/auth: ^1.49
• guzzlehttp/guzzle: ^7
• mcp/sdk: ^0.7.1
• nyholm/psr7: ^1
• open-telemetry/sdk: ^1.0
• pestphp/pest: ^3
• php-http/mock-client: ^1
• phpstan/extension-installer: ^1
• phpstan/phpstan: 2.2.13
• phpstan/phpstan-phpunit: ^2
• phpunit/phpunit: ^11
• symfony/http-client: ^7

Suggests

• aws/aws-sdk-php: Allows using the AWS Bedrock, AWS gateway, and Bedrock Mantle SDKs
• google/auth: Allows using the Google Vertex and Google Cloud gateway SDKs
• mcp/sdk: Required to use the BetaMcp helpers for integrating MCP servers with the Anthropic SDK

Apache-2.0

Published on Packagist.org on 2026-11-02 19:13 UTC

README

The Claude SDK for PHP provides access to the Claude API from PHP applications.

Documentation

Full documentation is available at platform.claude.com/docs/en/api/sdks/php.

Installation

composer require "anthropic-ai/sdk:^1.4.0"

The SDK needs a PSR-18 HTTP client. If you don't have one installed, add Guzzle:

composer require guzzlehttp/guzzle

Getting started

<?php

use Anthropic\Client;
use Anthropic\Messages\Model;

$client = new Client(
  apiKey: getenv('ANTHROPIC_API_KEY') ?: 'my-anthropic-api-key'
);

$message = $client->messages->create(
  maxTokens: 1024,
  messages: [['role' => 'user', 'content' => 'Hello, Claude']],
  model: Model::CLAUDE_OPUS_5_5,
);

var_dump($message->content);

Requirements

PHP 8.1.0+

Autoloading note

This SDK includes class aliases for backwards compatibility, but these are not available when using authoritative classmaps in Composer.

If you use composer --classmap-authoritative and you rely on any of the following class names:

• UnwrapWebhookEvent

Then update your code to use the true class name.

Contributing

See CONTRIBUTING.md.

License

This project is licensed under the Apache License, Version 2.0. See the LICENSE file for details. Versions released before the change from the MIT License, and third-party contributions merged before it, remain under the MIT License. See LICENSE-MIT.