diff --git a/lib/errors.js b/lib/errors.js
index e0e08097..bb9b4144 100644
--- a/lib/errors.js
+++ b/lib/errors.js
@@ -10,42 +10,50 @@ const byErrorCode = Object.assign(Object.create(null), {
 	AUTH: {
 		isClient: true,
 		code: ACCESS_DENIED,
-		message: 'invalid or missing authentication data'
+		message: 'invalid or missing authentication data',
+		statusCode: 401
 	},
 	R0001: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'unknown method'
+		message: 'unknown method',
+		statusCode: 400
 	},
 	R0002: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'invalid or missing request parameters'
+		message: 'invalid or missing request parameters',
+		statusCode: 400
 	},
 	R0007: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'internal communication error'
+		message: 'internal communication error',
+		statusCode: 500
 	},
 	R5000: {
 		isClient: true,
 		code: ACCESS_DENIED,
-		message: 'access denied'
+		message: 'access denied',
+		statusCode: 401
 	},
 	S1: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'journeys search: a connection to the backend server couldn\'t be established'
+		message: 'journeys search: a connection to the backend server couldn\'t be established',
+		statusCode: 503
 	},
 	LOCATION: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'location/stop not found'
+		message: 'location/stop not found',
+		statusCode: 400
 	},
 	H390: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: departure/arrival station replaced'
+		message: 'journeys search: departure/arrival station replaced',
+		statusCode: 400
 	},
 	H410: {
 		// todo: or is it a client error?
@@ -57,37 +65,44 @@ const byErrorCode = Object.assign(Object.create(null), {
 	H455: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: prolonged stop'
+		message: 'journeys search: prolonged stop',
+		statusCode: 400
 	},
 	H460: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: stop(s) passed multiple times'
+		message: 'journeys search: stop(s) passed multiple times',
+		statusCode: 400
 	},
 	H500: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: too many trains, connection is not complete'
+		message: 'journeys search: too many trains, connection is not complete',
+		statusCode: 400
 	},
 	H890: {
 		isClient: true,
 		code: NOT_FOUND,
-		message: 'journeys search unsuccessful'
+		message: 'journeys search unsuccessful',
+		statusCode: 404
 	},
 	H891: {
 		isClient: true,
 		code: NOT_FOUND,
-		message: 'journeys search: no route found, try with an intermediate stations'
+		message: 'journeys search: no route found, try with an intermediate stations',
+		statusCode: 404
 	},
 	H892: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: query too complex, try less intermediate stations'
+		message: 'journeys search: query too complex, try less intermediate stations',
+		statusCode: 400
 	},
 	H895: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: departure & arrival are too near'
+		message: 'journeys search: departure & arrival are too near',
+		statusCode: 400
 	},
 	H899: {
 		// todo: or is it a client error?
@@ -106,67 +121,80 @@ const byErrorCode = Object.assign(Object.create(null), {
 	H9220: {
 		isClient: true,
 		code: NOT_FOUND,
-		message: 'journeys search: no stations found close to the address'
+		message: 'journeys search: no stations found close to the address',
+		statusCode: 400
 	},
 	H9230: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'journeys search: an internal error occured'
+		message: 'journeys search: an internal error occured',
+		statusCode: 500
 	},
 	H9240: {
 		isClient: true,
 		code: NOT_FOUND,
-		message: 'journeys search unsuccessful'
+		message: 'journeys search unsuccessful',
+		statusCode: 404
 	},
 	H9250: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'journeys search: leg query interrupted'
+		message: 'journeys search: leg query interrupted',
+		statusCode: 500
 	},
 	H9260: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: unknown departure station'
+		message: 'journeys search: unknown departure station',
+		statusCode: 400
 	},
 	H9280: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: unknown intermediate station'
+		message: 'journeys search: unknown intermediate station',
+		statusCode: 400
 	},
 	H9300: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: unknown arrival station'
+		message: 'journeys search: unknown arrival station',
+		statusCode: 400
 	},
 	H9320: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: the input is incorrect or incomplete'
+		message: 'journeys search: the input is incorrect or incomplete',
+		statusCode: 400
 	},
 	H9360: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: error in a data field'
+		message: 'journeys search: error in a data field',
+		statusCode: 400
 	},
 	H9380: {
 		isClient: true,
 		code: INVALID_REQUEST,
-		message: 'journeys search: departure/arrival/intermediate station defined more than once'
+		message: 'journeys search: departure/arrival/intermediate station defined more than once',
+		statusCode: 400
 	},
 	SQ001: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'no departures/arrivals data available'
+		message: 'no departures/arrivals data available',
+		statusCode: 503
 	},
 	SQ005: {
 		isClient: true,
 		code: NOT_FOUND,
-		message: 'no trips found'
+		message: 'no trips found',
+		statusCode: 404
 	},
 	TI001: {
 		isServer: true,
 		code: SERVER_ERROR,
-		message: 'no trip info available'
+		message: 'no trip info available',
+		statusCode: 503
 	}
 })