z4j-fastapi 1.4.0

z4j FastAPI framework adapter (Apache 2.0)

z4j-fastapi

The FastAPI framework adapter for z4j.

Adds the z4j agent into your FastAPI app via a single add_z4j(app) call. Auto-discovers the engine adapter you have installed (Celery, RQ, Dramatiq, Huey, arq, TaskIQ) and streams every task lifecycle event to z4j. Operator control actions flow back the same channel.

What it ships

• One-line install, add_z4j(app) and the agent connects on the next uvicorn worker boot
• Engine auto-discovery, picks up whichever z4j engine adapter is installed alongside; cross-stack combos (FastAPI + arq, FastAPI + Celery) are first-class
• @z4j_meta decorator, optional per-task annotations (priority="critical", description="...") for dashboard filtering and SLO display
• Service-user safe, auto-relocates the local outbound buffer to $TMPDIR/z4j-{uid} when $HOME is unwritable (uvicorn under a service account, distroless images, etc.)

Install

pip install z4j-fastapi z4j-celery z4j-celerybeat

Wire it into your app:

from fastapi import FastAPI
from z4j_fastapi import add_z4j

app = FastAPI()
add_z4j(app)  # reads Z4J_AGENT_TOKEN, Z4J_BRAIN_URL, Z4J_PROJECT from env

Mint the agent token from the dashboard's Agents page.

Reliability

• No exception from the agent ever propagates back into FastAPI request handlers or your worker code.
• Events buffer locally when z4j is unreachable; your application never blocks on network I/O.

Documentation

Full docs at z4j.dev/frameworks/fastapi/.

License

Apache-2.0, see LICENSE.

Links

• Homepage: https://z4j.com
• Documentation: https://z4j.dev
• PyPI: https://pypi.org/project/z4j-fastapi/
• Issues: https://github.com/z4jdev/z4j-fastapi/issues
• Changelog: CHANGELOG.md
• Security: [e-mail] (see SECURITY.md)