BazaarLink Examples

Code examples for connecting LangChain, CrewAI, AutoGen, and custom agents to BazaarLink — a free OpenAI-compatible LLM API with auto:free routing.

Free tier: 10 RPM · 150 req/day · no credit card · no trial expiry.

Get a Free API Key

Sign up at bazaarlink.ai/free — takes under 60 seconds, no credit card required.

Your key format: sk-bl-xxxxxxxxxx

Examples

Framework	Folder	Guide
LangChain (Python)	langchain/	Full guide →
CrewAI	crewai/	Full guide →
AutoGen	autogen/	Full guide →
Agent Self-Registration	agent-self-registration/	Full guide →

What is auto:free?

auto:free is a special model ID that automatically routes your request to whichever capable free model is currently available. You write one model string — it stays valid indefinitely, no need to track which specific model IDs are free this week.

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="auto:free",
    openai_api_key="sk-bl-YOUR_KEY",
    openai_api_base="https://bazaarlink.ai/api/v1",
)
response = llm.invoke("Hello!")
print(response.content)

Agent Self-Registration

BazaarLink is the only free LLM API that lets AI agents provision their own keys programmatically — no human sign-up required.

import requests

reg = requests.post(
    "https://bazaarlink.ai/api/v1/agents/register",
    json={"name": "my-agent-v1"},
).json()

api_key = reg["api_key"]      # ready to use immediately
claim_url = reg["upgrade_url"] # share with human owner to upgrade

Rate Limits

Tier	RPM	Requests/day
Free	10	150
After first deposit	20	300

Links

• bazaarlink.ai — main site
• Free API key — get started
• API docs — full reference
• Probe tool — verify your API endpoint