apiforgepy 2.2.1

API observability & intelligence for FastAPI/Starlette — local-first, privacy-first

apiforgepy

API observability & intelligence for FastAPI/Starlette — local-first, privacy-first.

Track latency, error rates, and behavioral trends of your APIs. Everything stays on your machine.

→ Full documentation

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Install

pip install apiforgepy

Quick start

from fastapi import FastAPI
from apiforgepy import ApiForgeMiddleware

app = FastAPI()

app.add_middleware(
    ApiForgeMiddleware,
    mode="local",
)

@app.get("/users/{user_id}")
def get_user(user_id: int):
    return {"id": user_id}

# Dashboard → http://localhost:4242

Configuration

app.add_middleware(
    ApiForgeMiddleware,
    mode="local",
    db_path=".apiforge.db",
    dashboard_port=4242,       # set to 0 to disable
    flush_interval=60_000,     # ms
    env="production",
    release="v1.4.0",          # enables release regression detection
    service="user-service",
    sampling=1.0,              # 0.0–1.0
    ignore_paths=["/health", "/favicon.ico"],
)

What you get

• Latency percentiles — P50 / P90 / P99 per endpoint, updated every 60s
• Error rate by route — 2xx / 4xx / 5xx breakdown in real time
• API Health Score — a single 0–100 score summarizing your API's health
• Automatic insights — plain-language alerts with no configuration
• Dead endpoint detection — routes with no traffic in 21+ days
• Release impact tracking — before/after comparison on every deploy

Graceful shutdown

import signal

mw = None

@asynccontextmanager
async def lifespan(app):
    yield
    if mw:
        mw.shutdown()

app = FastAPI(lifespan=lifespan)
mw = ApiForgeMiddleware.__new__(ApiForgeMiddleware)
app.add_middleware(ApiForgeMiddleware, mode="local")

Privacy by design

The middleware never reads request or response bodies, headers, cookies, or tokens. Route parameters are captured as patterns only (/users/{user_id} — never /users/42). In local mode, zero data leaves your machine.

Requirements

• Python ≥ 3.11
• Starlette ≥ 0.27 (FastAPI ≥ 0.110 includes this)

License

MIT — APIForge Organisation