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Anthropic-compatible API

Anthropic clients call POST /v1/messages on https://apily.pro. Point the SDK base URL at that host and keep the same message shape.

Base URL
https://apily.pro
Endpoint
POST /v1/messages

Anthropic client

index.js
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "https://apily.pro",
  apiKey: "apily_your-api-key",
});

const message = await client.messages.create({
  model: "claude-opus-5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "ping" }],
});
console.log(message.content);

Messages reference