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SDK Reference

OpenAI SDK Compatibility

BazaarLink is fully compatible with the OpenAI Python and Node.js SDKs. Only two changes needed:

Before (OpenAI direct)

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from openai import OpenAI

client = OpenAI(
    api_key="sk-..."
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[...]
)

After (BazaarLink)

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from openai import OpenAI

client = OpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="openai/gpt-4o",  # add provider/
    messages=[...]
)

That's it!

All other features — streaming, tool calling, structured output, async — work exactly the same. The only change is base_url, api_key, and adding the provider prefix to model IDs.

Python

Installation

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pip install openai

Synchronous

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from openai import OpenAI

client = OpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-4o",
    messages=[{"role": "user", "content": "Hello!"}],
)

print(response.choices[0].message.content)

Async

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import asyncio
from openai import AsyncOpenAI

client = AsyncOpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

async def main():
    response = await client.chat.completions.create(
        model="anthropic/claude-sonnet-4.6",
        messages=[{"role": "user", "content": "Hello async world!"}],
    )
    print(response.choices[0].message.content)

asyncio.run(main())

Streaming with async

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async def stream_chat():
    stream = await client.chat.completions.create(
        model="deepseek/deepseek-chat",
        messages=[{"role": "user", "content": "Tell me a story"}],
        stream=True,
    )
    async for chunk in stream:
        content = chunk.choices[0].delta.content
        if content:
            print(content, end="", flush=True)

asyncio.run(stream_chat())

TypeScript / Node.js

Installation

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npm install openai

Basic Usage

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import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.bazaarlink.ai/v1",
  apiKey: process.env.BAZAARLINK_API_KEY,
});

async function chat(message: string): Promise<string> {
  const response = await client.chat.completions.create({
    model: "openai/gpt-4o",
    messages: [{ role: "user", content: message }],
  });
  return response.choices[0].message.content ?? "";
}

Streaming

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const stream = await client.chat.completions.create({
  model: "openai/gpt-4o",
  messages: [{ role: "user", content: "Tell me a story" }],
  stream: true,
});

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}

LangChain

Use BazaarLink with LangChain by configuring the OpenAI-compatible base URL.

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from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
    model="anthropic/claude-sonnet-4.6",
)

response = llm.invoke("Explain BazaarLink in one sentence.")
print(response.content)

LlamaIndex

Use BazaarLink in LlamaIndex RAG pipelines. LlamaIndex supports any OpenAI-compatible endpoint — just change two parameters.

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from llama_index.llms.openai import OpenAI
from llama_index.core import Settings

Settings.llm = OpenAI(
    model="openai/gpt-4o",
    api_base="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

# Now use LlamaIndex normally — it calls BazaarLink
from llama_index.core import VectorStoreIndex, SimpleDirectoryReader

documents = SimpleDirectoryReader("./docs").load_data()
index = VectorStoreIndex.from_documents(documents)
query_engine = index.as_query_engine()
response = query_engine.query("What is this documentation about?")
print(response)

Vercel AI SDK

Integrate the Vercel AI SDK with BazaarLink in your Next.js app. Supports streaming, tool calling, and structured output.

Installation

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npm install ai @ai-sdk/openai

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

const bazaarlink = createOpenAI({
  baseURL: "https://api.bazaarlink.ai/v1",
  apiKey: "sk-bl-YOUR_API_KEY",
});

const { text } = await generateText({
  model: bazaarlink("openai/gpt-4o"),
  prompt: "Write a haiku about programming",
});

console.log(text);