MicroAuthTurn your API into a paid product

API keys, rate limits and metered billing for your API — enforced by an SDK inside your service, so your traffic never touches a proxy.

Get started

FastAPI SDK

API reference

main.py

from fastapi import FastAPI, Security
from microauth_fastapi import MicroAuth, Customer

app = FastAPI()
auth = MicroAuth(app)  # auth, limits & billing — two lines

@app.get("/forecast")
async def forecast(customer: Customer = Security(auth)):
    return {"hello": customer.id}

pip install microauth-fastapi

🔑

API key auth, done for you

Customers create keys on your branded portal. The SDK authenticates every request from a locally cached snapshot — MicroAuth never sees your API traffic.

⏱️

Rate limiting & quotas

Per-customer RPS, monthly quotas and custom overrides, resolved inside your own API. Add Redis for shared limits across workers.

💳

Metered, prepaid billing

Count every authenticated response, charge only the status codes you choose, and reconcile prepaid credits through Stripe or your own billing.

🧩

Any language, three endpoints

Use the drop-in FastAPI SDK, or build on the same three-endpoint SDK API from Go, Node, Rust — anything that speaks HTTP.

Pick your path