connect-raven connect/express error middleware logging through raven use var connect_raven = require('connect-raven'); var app = express(); // other middleware here // the router should come before the error handlingapp.use(app.router); // make sure to use this middleware after the routerapp.use(connect_raven( {{ SENTRY DSN }} )); // routes ...// app.get// app.post references http://expressjs.com/guide.html#error-handling