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Zipをダウンロード ダウンロード中... name api-scaffolding description Quickly scaffold production-ready FastAPI endpoints for client workflows. Use when building new APIs for QuickBooks, ShipStation, or webhook integrations.
API Scaffolding for SMB Automation
Spin up professional REST APIs in minutes for client deliverables.
When to Use This Skill
Creating new API endpoints for client workflows
Building webhook receivers (Stripe, ShipStation, etc.)
Setting up FastAPI projects from scratch
Adding endpoints to existing execution/ scripts
Quick Start: New Endpoint
1. Define the Pydantic Models
from pydantic import BaseModel, EmailStr, Field
from typing import Optional
from datetime import datetime
class LineItem (BaseModel ):
description: str
quantity: int = Field(gt=0 )
unit_price: float = Field(gt=0 )
class CreateInvoiceRequest (BaseModel ):
customer_email: EmailStr
customer_name: str = Field(min_length=1 , max_length=100 )
line_items: [LineItem] = Field(min_length= )
due_date: datetime
memo: [ ] =
( ):
invoice_id:
qbo_id: [ ] =
status:
total:
created_at: datetime
list
1
Optional
str
None
class
InvoiceResponse
BaseModel
str
Optional
str
None
str
float
2. Create the Endpoint
from fastapi import APIRouter, HTTPException, Depends
from ..schemas.invoice import CreateInvoiceRequest, InvoiceResponse
from ..services.qbo_service import qbo_service
import logging
router = APIRouter(prefix="/invoices" , tags=["invoices" ])
log = logging.getLogger(__name__)
@router.post("/" , response_model=InvoiceResponse, status_code=201 )
async def create_invoice (request: CreateInvoiceRequest ):
"""Create a new invoice in QuickBooks."""
try :
total = sum (item.quantity * item.unit_price for item in request.line_items)
qbo_invoice = await qbo_service.create_invoice(
customer_email=request.customer_email,
customer_name=request.customer_name,
line_items=[item.model_dump() for item in request.line_items],
due_date=request.due_date,
memo=request.memo
)
log.info("Invoice created" , extra={
"invoice_id" : qbo_invoice.id ,
"customer" : request.customer_email,
"total" : total
})
return InvoiceResponse(
invoice_id=qbo_invoice.doc_number,
qbo_id=qbo_invoice.id ,
status="created" ,
total=total,
created_at=datetime.utcnow()
)
except QBOAuthError:
raise HTTPException(status_code=401 , detail="QuickBooks auth expired" )
except QBOValidationError as e:
raise HTTPException(status_code=422 , detail=str (e))
except Exception as e:
log.exception("Invoice creation failed" )
raise HTTPException(status_code=500 , detail="Internal error" )
3. Wire Up the Router
from fastapi import FastAPI
from .api import invoices, webhooks, inventory
app = FastAPI(
title="SMB Automation API" ,
version="1.0.0"
)
app.include_router(invoices.router, prefix="/api/v1" )
app.include_router(webhooks.router, prefix="/api/v1" )
app.include_router(inventory.router, prefix="/api/v1" )
@app.get("/health" )
async def health ():
return {"status" : "ok" }
Common Endpoint Patterns
Webhook Receiver
from fastapi import APIRouter, Request, HTTPException, Header
import hmac
import hashlib
router = APIRouter(prefix="/webhooks" , tags=["webhooks" ])
@router.post("/stripe" )
async def stripe_webhook (
request: Request,
stripe_signature: str = Header(alias="Stripe-Signature" )
):
"""Handle Stripe webhook events."""
payload = await request.body()
try :
event = stripe.Webhook.construct_event(
payload, stripe_signature, WEBHOOK_SECRET
)
except stripe.error.SignatureVerificationError:
raise HTTPException(status_code=400 , detail="Invalid signature" )
event_id = event["id" ]
if await is_processed(event_id):
return {"status" : "duplicate" }
match event["type" ]:
case "payment_intent.succeeded" :
await handle_payment_success(event["data" ]["object" ])
case "invoice.paid" :
await handle_invoice_paid(event["data" ]["object" ])
await mark_processed(event_id)
return {"status" : "processed" }
CRUD Resource
from fastapi import APIRouter, HTTPException, Query
from typing import Optional
router = APIRouter(prefix="/customers" , tags=["customers" ])
@router.get("/" )
async def list_customers (
skip: int = Query(0 , ge=0 ),
limit: int = Query(50 , ge=1 , le=100 ),
status: Optional [str ] = None
):
"""List customers with pagination."""
customers = await customer_service.list (skip=skip, limit=limit, status=status)
return {"customers" : customers, "total" : len (customers)}
@router.get("/{customer_id}" )
async def get_customer (customer_id: str ):
"""Get customer by ID."""
customer = await customer_service.get(customer_id)
if not customer:
raise HTTPException(status_code=404 , detail="Customer not found" )
return customer
@router.post("/" , status_code=201 )
async def create_customer (request: CreateCustomerRequest ):
"""Create new customer."""
customer = await customer_service.create(request)
return customer
@router.patch("/{customer_id}" )
async def update_customer (customer_id: str , request: UpdateCustomerRequest ):
"""Update customer."""
customer = await customer_service.update(customer_id, request)
if not customer:
raise HTTPException(status_code=404 , detail="Customer not found" )
return customer
@router.delete("/{customer_id}" , status_code=204 )
async def delete_customer (customer_id: str ):
"""Delete customer."""
deleted = await customer_service.delete(customer_id)
if not deleted:
raise HTTPException(status_code=404 , detail="Customer not found" )
Background Task Trigger
from fastapi import APIRouter, BackgroundTasks
router = APIRouter(prefix="/jobs" , tags=["jobs" ])
@router.post("/sync-inventory" )
async def trigger_inventory_sync (background_tasks: BackgroundTasks ):
"""Trigger background inventory sync."""
job_id = generate_job_id()
background_tasks.add_task(sync_inventory_task, job_id)
return {
"job_id" : job_id,
"status" : "queued" ,
"check_status" : f"/api/v1/jobs/{job_id} "
}
@router.get("/{job_id}" )
async def get_job_status (job_id: str ):
"""Check job status."""
job = await job_store.get(job_id)
if not job:
raise HTTPException(status_code=404 , detail="Job not found" )
return job
Project Structure execution/
├── main.py # FastAPI app entry
├── api/
│ ├── __init__.py
│ ├── invoices.py # Invoice endpoints
│ ├── webhooks.py # Webhook receivers
│ ├── customers.py # Customer CRUD
│ └── jobs.py # Background job triggers
├── schemas/
│ ├── __init__.py
│ ├── invoice.py # Invoice Pydantic models
│ └── customer.py # Customer Pydantic models
├── services/
│ ├── __init__.py
│ ├── qbo_service.py # QuickBooks API client
│ └── stripe_service.py # Stripe API client
└── core/
├── config.py # Settings from .env
├── database.py # DB connection (if needed)
└── security.py # Auth helpers
Essential Dependencies # requirements.txt
fastapi>=0.109.0
uvicorn>=0.27.0
pydantic>=2.5.0
pydantic-settings>=2.1.0
httpx>=0.26.0
python-dotenv>=1.0.0
Running Locally
pip install -r requirements.txt
uvicorn execution.main:app --reload --port 8000
open http://localhost:8000/docs
Deployment Checklist