sre-metrics 1.0.3

Minimalist SRE metrics for FastAPI and Flask

SRE Metrics

Minimalist SRE metrics for Python web frameworks.

Features

• Default metrics on port 9090
• Tracks individual status codes + optional grouping
• FastAPI and Flask support
• <5ms overhead

FastAPI Installation

pip install sre_metrics[fastapi]

FastAPI Usage

from fastapi import FastAPI
from sre_metrics import instrument_fastapi

app = FastAPI()
instrument_fastapi(app)  # Metrics on :9090 by default

# Custom port
instrument_fastapi(app, metrics_port=9091, excluded_paths=["/healthz"])

Flask Installation

pip install sre_metrics[flask]

from flask import Flask
from sre_metrics import instrument_flask

app = Flask(__name__)
instrument_flask(app)  # Metrics on :9090

# Custom options:
instrument_flask(app, metrics_port=9091, excluded_paths=["/healthz"])

Rebuild locally

uv sync
uv pip install twine fastapi flask httpx uvicorn
uv run pytest
rm -rf build/ dist/ sre_metrics.egg-info/
uv run python -m build
pip install --force-reinstall dist/sre_metrics-*-py3-none-any.whl
python -c "import sre_metrics;"

## twine
uv add twine
rm -rf build/ dist/ sre_metrics.egg-info/
uv run python -m build
pip install --force-reinstall dist/sre_metrics-*-py3-none-any.whl
twine upload dist/*