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FastAPI Tracing

Trace FastAPI request spans with Judgment.

FastAPI tracing uses the standard OpenTelemetry FastAPI instrumentation and routes request spans through Judgment.

uv add judgeval fastapi opentelemetry-instrumentation-fastapi

pip install judgeval fastapi opentelemetry-instrumentation-fastapi

fastapi_tracing.py

from fastapi import FastAPI
from judgeval import Tracer
from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor

Tracer.init(project_name="fastapi_app")

app = FastAPI()
FastAPIInstrumentor.instrument_app(app)


@app.get("/hello")
async def hello():
    return {"message": "hello"}

OpenLLMetry Integration

Export OpenLLMetry traces to the Judgment platform.

Starlette

Trace Starlette request spans with Judgment.

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FastAPI Tracing

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