Claude API Guide

Anthropic Claude is a large language model developed by Anthropic and known for safety and usefulness.

Installation

Python

pip install anthropic

JavaScript

npm install @anthropic-ai/sdk

curl

# curl is usually available on the system; no SDK installation is required

Basic Usage

Python

import anthropic

client = anthropic.Anthropic(
    api_key="your-api-key",
    base_url="https://aisupermarket.work",
)

message = client.messages.create(
    model="claude-opus-4-7",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello, please introduce yourself"}
    ]
)

print(message.content[0].text)

JavaScript

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: "your-api-key",
  baseURL: "https://aisupermarket.work",
});

const message = await client.messages.create({
  model: "claude-opus-4-7",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello, please introduce yourself" }],
});

console.log(message.content[0].text);

curl

curl https://aisupermarket.work/v1/messages \
  -H "x-api-key: your-api-key" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-opus-4-7",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello, please introduce yourself"}]
  }'

Common Models

Model	Description
claude-opus-4-7	Strongest capability, suitable for complex tasks, coding, and agents
claude-opus-4-6	Previous-generation flagship model
claude-sonnet-4-6	Balanced speed and capability, suitable for most scenarios