Anthropic API

ELI5 — The Vibe Check

The API that lets you talk to Claude from your own code. Send a message, get a response — that's the basics. But it also does tool use (Claude can call your functions), streaming (words appear as they're generated), and vision (Claude can see images). It's how you build AI features into your app.

Real Talk

The Anthropic API provides programmatic access to Claude models via a REST API. It supports text generation, multi-turn conversations, tool use (function calling), vision inputs, and streaming responses. SDKs are available for Python and TypeScript. Pricing is per-token with different rates for input and output.

Show Me The Code

import Anthropic from '@anthropic-ai/sdk'

const client = new Anthropic()
const response = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  messages: [{ role: 'user', content: 'Explain recursion' }]
})
console.log(response.content[0].text)

When You'll Hear This

"Integrate the Anthropic API for the chatbot feature." / "The Anthropic API's tool use is perfect for agentic workflows."