⏱ Estimated Time To Completion: 5 minutes
Please make sure you’ve installed Decipher for your frontend via Sentry before continuing; PostHog doesn’t support backend data in the same way.
1

Install the SDK

Decipher uses the Sentry SDK to collect runtime data from your application. Installation is simple:
Bash
pip install --upgrade 'sentry-sdk[fastapi]'
The FastAPI integration will be automatically enabled when you initialize the Sentry SDK, provided the FastAPI package is included in your application’s dependencies.
2

Initialize the SDK

Initialize the SDK as soon as possible in your application’s runtime.
import sentry_sdk

sentry_sdk.init(
    dsn="YOUR_DECIPHER_DSN", # Get this at https://app.getdecipher.com/settings
    traces_sample_rate=1.0,
    profiles_sample_rate=1.0,
)

app = FastAPI(__name__)
# ...
You can get the dsn parameter by creating a project within Decipher with your work email. On the Settings page, select a new project name and click “Create New Project”. Decipher will generate a DSN to that you can paste.
3

Test the integration

Throw an error anywhere in your application and Decipher will automatically capture the exception and runtime alongside it.For example:
from FastAPI import FastAPI

sentry_sdk.init(...)   # See above

app = FastAPI(__name__)

@app.route("/")
def hello_world():
    1 / 0  # raises an error
    return "<p>Hello, World!</p>"
Check out the Decipher dashboard to see information about your captured error. Decipher will automatically analyze and group your errors to highlight the important, high-impact ones.