Anthropic SDK

The Inference.net API supports the Anthropic Messages format at POST https://api.inference.net/v1/messages. This means you can use the Anthropic SDK to call any serverless model hosted on Inference.net, such as glm-5.2. Only your Inference.net API key is needed.

Requests are converted to and from the model's native format for you. Both non-streaming and streaming responses are supported.

#Authentication

The Anthropic SDK sends its apiKey as the x-api-key header, but the Inference.net API expects your key as a Bearer token in the Authorization header. Pass your Inference.net API key as authToken (TypeScript) or auth_token (Python), which sends Authorization: Bearer <key>. In TypeScript, also set apiKey: null so the SDK does not look for an Anthropic key.

export INFERENCE_API_KEY=<your-api-key>

#Non-streaming

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

const client = new Anthropic({
  baseURL: "https://api.inference.net",
  apiKey: null,
  authToken: process.env.INFERENCE_API_KEY,
});

const message = await client.messages.create({
  model: "glm-5.2",
  max_tokens: 1024,
  messages: [{ role: "user", content: "What is the meaning of life?" }],
});

console.log(message.content);

#Streaming

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

const client = new Anthropic({
  baseURL: "https://api.inference.net",
  apiKey: null,
  authToken: process.env.INFERENCE_API_KEY,
});

const stream = client.messages.stream({
  model: "glm-5.2",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Count from 1 to 5." }],
});

stream.on("text", (text) => {
  process.stdout.write(text);
});

const message = await stream.finalMessage();
console.log("\n", message.usage);

The same code works for every serverless model. Set model to the model ID you want. Browse available models in the model catalog.