Sign in for your apps, and keys and billing for your APIs

from fastapi import Depends, FastAPI
from microauth_fastapi import User, UserAuth

app = FastAPI()
auth = UserAuth(app)  # adds /auth/login, /auth/callback and /auth/logout

@app.get("/dashboard")
async def dashboard(user: User = Depends(auth.login_required)):
    return {"hello": user.name}

@app.post("/posts")
async def create_post(user: User = Depends(auth.require(permissions="posts:write"))):
    ...

from fastapi import FastAPI
from mcp.server.mcpserver import MCPServer
from microauth_fastapi import McpAuth, current_identity

mcp = MCPServer("Invoices", log_level="WARNING")
auth = McpAuth(scopes=["invoices:read"])

@mcp.tool()
@auth.tool("invoices:write")
def create_invoice(customer: str, amount_cents: int) -> dict:
    return {"owner": current_identity().sub, "customer": customer, "amount_cents": amount_cents}

app = FastAPI()
auth.mount(app, mcp)  # serves /mcp next to your other routes

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

app = FastAPI()
auth = MicroAuth(app)  # reads MICROAUTH_SECRET_KEY

@app.get("/forecast")
async def forecast(city: str, customer: Customer = Security(auth)):
    # a 200 here charges this customer your price per request
    return {"city": city, "credit_left_micro": customer.credit_balance_micro}

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

app = FastAPI()
auth = MicroAuth(app)  # reads your internal API's MICROAUTH_SECRET_KEY

@app.get("/reports")
async def reports(customer: Customer = Security(auth)):
    return {"team": customer.id, "key": customer.key_id}