diff --git a/lib/www/server/api/index.js b/lib/www/server/api/index.js
index a8aa477..7206c38 100644
--- a/lib/www/server/api/index.js
+++ b/lib/www/server/api/index.js
@@ -357,6 +357,26 @@ app.map({
 			delete: [ mw.auth.operations, mw.auth.access.write, mw.info.delete ]
 		}
 	},
+
+	/*
+	 * 4D comparisons
+	 */
+
+	// FIXME no authentication yet!
+
+	'/comparison/group': {
+		get: [ mw.comparisons.groups.list ],
+		'/:group': {
+			get: [ mw.comparisons.groups.get ],
+		},
+	},
+
+
+
+	/*
+	 * Other endpoints
+	 */
+
 	'/queue/outgoing/': {
 		'asaqc': {
 			get: [ mw.etag.noSave, mw.queue.asaqc.get ],
diff --git a/lib/www/server/api/middleware/comparisons/groups/get.js b/lib/www/server/api/middleware/comparisons/groups/get.js
new file mode 100644
index 0000000..629d2e1
--- /dev/null
+++ b/lib/www/server/api/middleware/comparisons/groups/get.js
@@ -0,0 +1,20 @@
+const comparisons = require('../../../../lib/comparisons');
+
+
+module.exports = async function (req, res, next) {
+
+	try {
+		// const data = await comparisons.groups()
+		// if (data?.[req.params.group]) {
+		const data = await comparisons.getGroup(req.params.group);
+		if (data) {
+			res.status(200).send(data);
+		} else {
+			res.status(404).send({message: "Group does not exist"});
+		}
+		return next();
+	} catch (err) {
+		next(err);
+	}
+
+};
diff --git a/lib/www/server/api/middleware/comparisons/groups/index.js b/lib/www/server/api/middleware/comparisons/groups/index.js
new file mode 100644
index 0000000..ee7b7f4
--- /dev/null
+++ b/lib/www/server/api/middleware/comparisons/groups/index.js
@@ -0,0 +1,4 @@
+module.exports = {
+	list: require('./list'),
+	get: require('./get'),
+}
diff --git a/lib/www/server/api/middleware/comparisons/groups/list.js b/lib/www/server/api/middleware/comparisons/groups/list.js
new file mode 100644
index 0000000..cf4697a
--- /dev/null
+++ b/lib/www/server/api/middleware/comparisons/groups/list.js
@@ -0,0 +1,18 @@
+const comparisons = require('../../../../lib/comparisons');
+
+
+module.exports = async function (req, res, next) {
+
+	try {
+		const data = await comparisons.groups()
+		if (data) {
+			res.status(200).send(data);
+		} else {
+			res.status(204).end();
+		}
+		return next();
+	} catch (err) {
+		next(err);
+	}
+
+};
diff --git a/lib/www/server/api/middleware/comparisons/index.js b/lib/www/server/api/middleware/comparisons/index.js
new file mode 100644
index 0000000..5c4f5aa
--- /dev/null
+++ b/lib/www/server/api/middleware/comparisons/index.js
@@ -0,0 +1,3 @@
+module.exports = {
+	groups: require('./groups')
+}
diff --git a/lib/www/server/api/middleware/index.js b/lib/www/server/api/middleware/index.js
index 993ccad..432737f 100644
--- a/lib/www/server/api/middleware/index.js
+++ b/lib/www/server/api/middleware/index.js
@@ -23,4 +23,5 @@ module.exports = {
 	version: require('./version'),
 	admin: require('./admin'),
 	compress: require('./compress'),
+	comparisons: require('./comparisons'),
 };