diff --git a/index.js b/index.js
index d9b411a00..d29aefe0d 100644
--- a/index.js
+++ b/index.js
@@ -532,6 +532,9 @@ const createClient = (profile, userAgent, opt = {}) => {
 			onlyCR: opt.onlyCurrentlyRunning,
 			jnyFltrL: [
 				profile.formatProductsFilter({profile}, opt.products),
+				// these don't work:
+				// {mode: 'INC', type: 'ROUTE', value: 'R::10::Schiff::B3012287613::de:aac:05358|obersee:rs::1'},
+				// {mode: 'INC', type: 'CAT', value: 'G::4::Fähre::B*::*::*'},
 			],
 			// todo: passing `tripId` yields a `CGI_READ_FAILED` error
 			// todo: passing a stop ID as `extId` yields a `PARAMETER` error
@@ -597,6 +600,66 @@ const createClient = (profile, userAgent, opt = {}) => {
 		}
 	}
 
+	// todo: rename to tripsAsTree? how do we obtain actual trips?
+	const pidFiltersAsTree = async (opt = {}) => {
+		const {
+			pidFilter,
+		} = Object.assign({
+			pidFilter: null,
+		}, opt)
+
+		const {res, common} = await profile.request({profile, opt}, userAgent, {
+			meth: 'JourneyTree',
+			req: {
+				pid: pidFilter,
+				// https://github.com/marudor/BahnhofsAbfahrten/blob/f32da187ef3306345674ea4665c97135f6f4c20f/packages/types/HAFAS/JourneyTree.ts#L3-L13
+				// getChilds?: number;
+				getHIM: false,
+				getParent: true,
+				getStatus: true,
+				// todo: https://github.com/marudor/BahnhofsAbfahrten/blob/41b0bfcc450acf154b5c3476d26658072ca3f038/packages/types/HAFAS/index.ts#L89-L109
+				// himFltrL?: HimFilter[];
+				// todo: https://github.com/marudor/BahnhofsAbfahrten/blob/41b0bfcc450acf154b5c3476d26658072ca3f038/packages/types/HAFAS/index.ts#L20-L45
+				// see also https://github.com/derhuerst/BahnhofsAbfahrten/pull/1
+				jnyFltrL: [
+				// {
+				// 	mode: 'INC',
+				// 	type: 'JID',
+				// 	value: '1|18357|19|86|21102021',
+				// }
+				],
+				// rect?: GeoRect;
+				// ring?: GeoRing;
+			},
+		})
+
+		if (!Array.isArray(res.jnyTreeNodeL)) return null
+
+		const ctx = {profile, opt, common, res}
+		return profile.parsePidFiltersTree(ctx, res.jnyTreeNodeL)
+	}
+
+	// todo: rename
+	const foo = async (opt = {}) => {
+		const {res, common} = await profile.request({profile, opt}, userAgent, {
+			meth: 'JourneyGraph',
+			req: {
+				// https://github.com/marudor/BahnhofsAbfahrten/blob/f32da187ef3306345674ea4665c97135f6f4c20f/packages/types/HAFAS/JourneyGraph.ts#L3-L11
+				date: '20211021',
+				getPasslist: true,
+				getProductStartEndInfo: true,
+				// todo: https://github.com/marudor/BahnhofsAbfahrten/blob/41b0bfcc450acf154b5c3476d26658072ca3f038/packages/types/HAFAS/index.ts#L20-L45
+				// see also https://github.com/derhuerst/BahnhofsAbfahrten/pull/1
+				jnyFltrL: [{
+					mode: 'INC',
+					type: 'JID',
+					value: '1|18357|19|86|21102021',
+				}],
+			},
+		})
+		return null // todo
+	}
+
 	const radar = async ({north, west, south, east}, opt) => {
 		if ('number' !== typeof north) throw new TypeError('north must be a number.')
 		if ('number' !== typeof west) throw new TypeError('west must be a number.')
@@ -789,6 +852,8 @@ const createClient = (profile, userAgent, opt = {}) => {
 		locations,
 		stop,
 		nearby,
+		pidFiltersAsTree,
+		foo, // todo
 		serverInfo,
 	}
 	if (profile.trip) client.trip = trip
diff --git a/lib/default-profile.js b/lib/default-profile.js
index 2578bd704..b8c7b37c2 100644
--- a/lib/default-profile.js
+++ b/lib/default-profile.js
@@ -33,6 +33,7 @@ import {parseOperator} from '../parse/operator.js'
 import {parseHint} from '../parse/hint.js'
 import {parseWarning} from '../parse/warning.js'
 import {parseStopover} from '../parse/stopover.js'
+import {parsePidFiltersTree} from '../parse/pid-filters-tree.js'
 
 import {formatAddress} from '../format/address.js'
 import {formatCoord} from '../format/coord.js'
@@ -102,6 +103,7 @@ const defaultProfile = {
 	parseHint,
 	parseWarning,
 	parseStopover,
+	parsePidFiltersTree,
 
 	formatAddress,
 	formatCoord,
diff --git a/parse/pid-filters-tree.js b/parse/pid-filters-tree.js
new file mode 100644
index 000000000..703032488
--- /dev/null
+++ b/parse/pid-filters-tree.js
@@ -0,0 +1,57 @@
+const nodeKinds = new Map()
+// todo: are these correct?
+nodeKinds.set('P', 'product') // usually level 0, pid filter begins with `P:` "Produkt"?
+nodeKinds.set('C', 'category') // usually level 1, pid filter begins with `G:` "Gruppe"?
+nodeKinds.set('O', 'operator') // usually level 2, pid filter begins with `B:` "Betreiber"?
+nodeKinds.set('L', 'line') // usually level 3, pid filter begins with `L:` "Linie"?
+nodeKinds.set('D', 'direction') // usually level 4, pid filter begins with `R:` "Richtung"?
+
+const parsePidFiltersTree = (ctx, jnyTreeNodeL) => {
+	const parsedNodes = new WeakMap() // raw node -> parsed node
+	const parseNode = (idx) => {
+		const _ = jnyTreeNodeL[idx]
+		if (!_) throw new Error(`missing node ${idx}`) // todo: don't let this happen
+		if (parsedNodes.has(_)) return parsedNodes.get(_)
+
+		// todo: what is _.stat.rt? nr of children with realtime data?
+		// todo: what is _.stat.ont?
+		// todo: what is _.stat.cncl? nr of canceled children?
+		// todo: what is _.stat.delGrpL & _.stat.delCntL?
+		// todo: what is _.stat.him? nr of children with HIM messages?
+		const node = {
+			kind: nodeKinds.has(_.type) ? nodeKinds.get(_.type) : null,
+			name: _.name,
+			pidFilter: _.pid, // todo [breaking]: rename field?
+			// todo [breaking]: rename field?
+			// todo: parse differently? most tree nodes have a sparse common.prodL[_.prodX]
+			product: _.line,
+			// nrOfTrips: _.stat ? _.stat.cnt : null, // todo: is this wrong
+			// todo: _.icon?
+		}
+		parsedNodes.set(_, node)
+
+		if (Array.isArray(_.childRefL)) {
+			node.children = _.childRefL.map(parseNode)
+		}
+
+		return node
+	}
+
+	const rootChildren = jnyTreeNodeL
+		.map((node, idx) => [idx, node])
+		.filter(([_, node]) => !jnyTreeNodeL[node.parRefX]) // keep nodes without parent
+		.map(([idx]) => parseNode(idx))
+
+	return {
+		// mock root node
+		kind: 'root',
+		name: null,
+		pid: null,
+		product: null,
+		children: rootChildren,
+	}
+}
+
+export {
+	parsePidFiltersTree,
+}
diff --git a/tools/debug-cli/cli.js b/tools/debug-cli/cli.js
index b6ee4c69b..ef5fccb9a 100755
--- a/tools/debug-cli/cli.js
+++ b/tools/debug-cli/cli.js
@@ -46,6 +46,8 @@ const methodsAndTheirArgs = [
 	['lines', 0, toString],
 	['lines', 1, parseJsObject],
 	['serverInfo', 0, parseJsObject],
+	['pidFiltersAsTree', 0, parseJsObject],
+	['foo', 0, parseJsObject],
 ]
 
 const {