SDKs and integrations

python -m pip install openai

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.impossibl.com/v1",
    api_key=os.environ["IMPOSSIBL_API_KEY"],
)

resp = client.chat.completions.create(
    model="anthropic/claude-sonnet-4-5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

npm install openai

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.impossibl.com/v1",
  apiKey: process.env.IMPOSSIBL_API_KEY,
});

const resp = await client.chat.completions.create({
  model: "google/gemini-2.5-flash",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);

npm install ai @ai-sdk/openai

import { createOpenAI } from "@ai-sdk/openai";
import { generateText } from "ai";

const gateway = createOpenAI({
  baseURL: "https://api.impossibl.com/v1",
  apiKey: process.env.IMPOSSIBL_API_KEY,
});

const { text } = await generateText({
  model: gateway.chat("openai/gpt-4o-mini"),
  prompt: "Hello!",
});
console.log(text);

python -m pip install langchain-openai

import os
from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    base_url="https://api.impossibl.com/v1",
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    model="anthropic/claude-haiku-4-5",
)
print(llm.invoke("Hello!").content)

python -m pip install anthropic
# For the TypeScript example:
npm install @anthropic-ai/sdk

import os
from anthropic import Anthropic

client = Anthropic(
    base_url="https://api.impossibl.com",
    api_key=os.environ["IMPOSSIBL_API_KEY"],
)

msg = client.messages.create(
    model="anthropic/claude-haiku-4-5",
    max_tokens=256,
    messages=[{"role": "user", "content": "Hello!"}],
)
print(msg.content[0].text)

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

const client = new Anthropic({
  baseURL: "https://api.impossibl.com",
  apiKey: process.env.IMPOSSIBL_API_KEY,
});

const msg = await client.messages.create({
  model: "anthropic/claude-haiku-4-5",
  max_tokens: 256,
  messages: [{ role: "user", content: "Hello!" }],
});

export ANTHROPIC_BASE_URL="https://api.impossibl.com"
export ANTHROPIC_AUTH_TOKEN="$IMPOSSIBL_API_KEY"
export ANTHROPIC_MODEL="anthropic/claude-sonnet-4-5"
export ANTHROPIC_API_KEY=""
claude