Guides.
Fehlo works with the official sentry SDKs. For the most used stacks, here is which package to install, where the DSN goes and how to check that errors arrive.
Guides by stack
| Stack | Package | Guide |
|---|---|---|
| React, for example with Vite | @sentry/react | Set up React |
| Next.js (App Router) | @sentry/nextjs | Set up Next.js |
| Vue 2 and 3 | @sentry/vue | Set up Vue |
| Nuxt 3 and 4 | @sentry/nuxt | Set up Nuxt |
| Node.js and Express | @sentry/node | Set up Node.js |
| Python and Django | sentry-sdk | Set up Django |
| Python and FastAPI | sentry-sdk | Set up FastAPI |
| Odoo 16 to 19 | sentry-sdk in a small addon | Set up Odoo |
| PHP and Laravel | sentry/sentry-laravel | Set up Laravel |
| Symfony | sentry/sentry-symfony | Set up Symfony |
| PHP without a framework | sentry/sentry | Set up PHP |
| Shopware 6 | frosh/sentry-bundle | Set up Shopware |
| TYPO3 12 to 14 | networkteam/sentry-client | Set up TYPO3 |
| WordPress | plugin wp-sentry-integration | Set up WordPress |
| Flutter | sentry_flutter | Set up Flutter |
For plain JavaScript, plain Python, iOS and React Native, Fehlo shows the code when you create a project. For Java and Android, .NET, Go and Ruby, use the matching sentry SDK with the DSN from Fehlo. Errors from Make and Zapier need no SDK at all.
The same for every stack
- DSN. It looks like
https://<key>@app.fehlo.de/<project-id>. You find it in Fehlo under Project, Settings, Client keys. - Environment variables. The SDKs read
SENTRY_DSN,SENTRY_ENVIRONMENTandSENTRY_RELEASEwhen you do not set the values in code. Laravel readsSENTRY_LARAVEL_DSN. - Uploads. Unless told otherwise, sentry-cli and the bundler plugins upload to sentry.io. Set
SENTRY_URL=https://app.fehlo.de/and use an API token from Fehlo (Settings, API tokens, preset "For source maps"). - Wizard. You do not need Sentry's setup wizard (
npx @sentry/wizard); it signs in to the target server, and we have not tested that with Fehlo. Each guide shows the manual setup.
What we tested
On 19 October 2026 we sent errors and messages to Fehlo with these SDKs and checked them in Fehlo: @sentry/node 11.8.0, @sentry/browser 11.8.0 with source maps via sentry-cli 3.8.0, sentry-sdk 2.72.0 for Python, sentry-go 0.50.0 and sentry-ruby 7.1.0. We checked the code in each guide against Sentry's documentation and the published packages: React, Next.js, Node.js, Django and Laravel on 21 October 2026, the others on 24 October 2026. Each guide states its date and whether we tested the SDK against Fehlo ourselves.