diff --git a/src/data/icon-sets.ts b/src/data/icon-sets.ts
index 68c0d80..8217e7b 100644
--- a/src/data/icon-sets.ts
+++ b/src/data/icon-sets.ts
@@ -16,13 +16,25 @@ export function setImporters(items: Importer[]) {
 /**
  * All prefixes, sorted
  */
-let prefixes: string[] = [];
+let allPrefixes: string[] = [];
+let prefixesWithInfo: string[] = [];
+let visiblePrefixes: string[] = [];
 
 /**
  * Get all prefixes
  */
-export function getPrefixes(): string[] {
-	return prefixes;
+type GetPrefixes = 'all' | 'info' | 'visible';
+export function getPrefixes(type: GetPrefixes = 'all'): string[] {
+	switch (type) {
+		case 'all':
+			return allPrefixes;
+
+		case 'info':
+			return prefixesWithInfo;
+
+		case 'visible':
+			return visiblePrefixes;
+	}
 }
 
 /**
@@ -45,6 +57,8 @@ export function updateIconSets(): number {
 
 	const newLoadedIconSets: Set<StoredIconSet> = new Set();
 	const newPrefixes: Set<string> = new Set();
+	const newPrefixesWithInfo: Set<string> = new Set();
+	const newVisiblePrefixes: Set<string> = new Set();
 
 	importers.forEach((importer, importerIndex) => {
 		const data = importer.data;
@@ -63,7 +77,16 @@ export function updateIconSets(): number {
 
 			// Add prefix, but delete it first to keep order
 			newPrefixes.delete(prefix);
+			newPrefixesWithInfo.delete(prefix);
+			newVisiblePrefixes.delete(prefix);
+
 			newPrefixes.add(prefix);
+			if (item.info) {
+				newPrefixesWithInfo.add(prefix);
+				if (!item.info.hidden) {
+					newVisiblePrefixes.add(prefix);
+				}
+			}
 
 			// Set data
 			iconSets[prefix] = {
@@ -81,8 +104,10 @@ export function updateIconSets(): number {
 	loadedIconSets = newLoadedIconSets;
 
 	// Update prefixes
-	prefixes = Array.from(newPrefixes);
-	return prefixes.length;
+	allPrefixes = Array.from(newPrefixes);
+	prefixesWithInfo = Array.from(newPrefixesWithInfo);
+	visiblePrefixes = Array.from(newVisiblePrefixes);
+	return allPrefixes.length;
 }
 
 /**
diff --git a/src/http/helpers/prefixes.ts b/src/http/helpers/prefixes.ts
index 305b3cf..00eeab6 100644
--- a/src/http/helpers/prefixes.ts
+++ b/src/http/helpers/prefixes.ts
@@ -7,12 +7,16 @@ interface MatchPrefixesParams {
 }
 
 /**
- * Filter prefixes
+ * Filter prefixes by name
  *
  * returnEmpty = true -> if no filter params set, returns empty array
  * returnEmpty = false -> if no filter params set, returns all filters
  */
-export function filterPrefixes(prefixes: string[], params: MatchPrefixesParams, returnEmpty: boolean): string[] {
+export function filterPrefixesByPrefix(
+	prefixes: string[],
+	params: MatchPrefixesParams,
+	returnEmpty: boolean
+): string[] {
 	const exactMatch = params.prefix;
 	if (exactMatch) {
 		// Exact match
diff --git a/src/http/index.ts b/src/http/index.ts
index 93a1231..4381078 100644
--- a/src/http/index.ts
+++ b/src/http/index.ts
@@ -2,6 +2,7 @@ import fastify, { FastifyReply } from 'fastify';
 import { appConfig } from '../config/app';
 import { runWhenLoaded } from '../data/loading';
 import { iconNameRoutePartialRegEx, iconNameRouteRegEx, splitIconName } from '../misc/name';
+import { generateCollectionsListResponse } from './responses/collections';
 import { generateIconsDataResponse } from './responses/icons';
 import { generateLastModifiedResponse } from './responses/modified';
 import { generateSVGResponse } from './responses/svg';
@@ -106,6 +107,13 @@ export async function startHTTPServer() {
 		});
 	});
 
+	// Icon sets list
+	server.get('/collections', (req, res) => {
+		runWhenLoaded(() => {
+			generateCollectionsListResponse(req.query, res);
+		});
+	});
+
 	// Update icon sets
 	server.get('/update', (req, res) => {
 		generateUpdateResponse(req.query, res);
diff --git a/src/http/responses/collections.ts b/src/http/responses/collections.ts
new file mode 100644
index 0000000..49297e2
--- /dev/null
+++ b/src/http/responses/collections.ts
@@ -0,0 +1,32 @@
+import type { IconifyInfo } from '@iconify/types';
+import type { FastifyReply, FastifyRequest } from 'fastify';
+import { getPrefixes, iconSets } from '../../data/icon-sets';
+import { checkJSONPQuery, sendJSONResponse } from '../helpers/json';
+import { filterPrefixesByPrefix } from '../helpers/prefixes';
+
+/**
+ * Send response
+ */
+export function generateCollectionsListResponse(query: FastifyRequest['query'], res: FastifyReply) {
+	const q = (query || {}) as Record<string, string>;
+	const wrap = checkJSONPQuery(q);
+	if (!wrap) {
+		// Invalid JSONP callback
+		res.send(400);
+		return;
+	}
+
+	// Filter prefixes
+	const prefixes = filterPrefixesByPrefix(getPrefixes('info'), q, false);
+	const response = Object.create(null) as Record<string, IconifyInfo>;
+
+	for (let i = 0; i < prefixes.length; i++) {
+		const prefix = prefixes[i];
+		const info = iconSets[prefix]?.item.info;
+		if (info) {
+			response[prefix] = info;
+		}
+	}
+
+	sendJSONResponse(response, q, wrap, res);
+}
diff --git a/src/http/responses/modified.ts b/src/http/responses/modified.ts
index fef7fff..d03a721 100644
--- a/src/http/responses/modified.ts
+++ b/src/http/responses/modified.ts
@@ -2,7 +2,7 @@ import type { FastifyReply, FastifyRequest } from 'fastify';
 import { getPrefixes, iconSets } from '../../data/icon-sets';
 import type { LastModifiedAPIResponse } from '../../types/server/modified';
 import { checkJSONPQuery, sendJSONResponse } from '../helpers/json';
-import { filterPrefixes } from '../helpers/prefixes';
+import { filterPrefixesByPrefix } from '../helpers/prefixes';
 
 /**
  * Generate icons data
@@ -17,7 +17,7 @@ export function generateLastModifiedResponse(query: FastifyRequest['query'], res
 	}
 
 	// Filter prefixes
-	const prefixes = filterPrefixes(getPrefixes(), q, false);
+	const prefixes = filterPrefixesByPrefix(getPrefixes(), q, false);
 
 	// Generate result
 	const lastModified = Object.create(null) as Record<string, number>;