Anthropic

Model

API for the Claude family of language models

Price: Free credits, then paid
Access: API key

About

Anthropic's API serves the Claude models for chat, coding, image understanding and agents, with tool use, web search and code execution built in. It is for developers adding an LLM to apps or agents. Current models read up to 1M tokens of context.

What you can do with it

Add a Claude chat assistant or text generation to your app
Generate, review and refactor code with Claude models
Build agents that call your tools, search the web and run code

Get started

Create a Claude Console account
Create an API key
Set ANTHROPIC_API_KEY in your environment

Example

curl https://api.anthropic.com/v1/messages \
  -H "content-type: application/json" \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-opus-5-5",
    "max_tokens": 1000,
    "messages": [{"role": "user", "content": "Hello, Claude"}]
  }'

Details

Hosting: Hosted service
Available in: Worldwide
Official SDKs: Python, JavaScript/TypeScript, C#, Go, Java, PHP, Ruby
MCP server: None