diff --git a/src/api/routes/channels/preload-messages.ts b/src/api/routes/channels/preload-messages.ts
new file mode 100644
index 00000000..e18f33f6
--- /dev/null
+++ b/src/api/routes/channels/preload-messages.ts
@@ -0,0 +1,72 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2025 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { route } from "@spacebar/api";
+import { Config, PreloadMessagesRequestSchema, Message, PreloadMessagesResponseSchema } from "@spacebar/util";
+import { Request, Response, Router } from "express";
+const router = Router();
+
+router.post(
+ "/",
+ route({
+ // // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+ // // @ts-expect-error
+ // requestBody: "PreloadMessagesRequest", // this is broken for some reason?
+ responses: {
+ 200: {
+ body: "PreloadMessagesResponse",
+ },
+ 400: {
+ body: "APIErrorResponse",
+ },
+ },
+ }),
+ async (req: Request, res: Response) => {
+ const body = req.body as PreloadMessagesRequestSchema;
+ if (body.channels.length > Config.get().limits.message.maxPreloadCount)
+ return res.status(400).send({
+ code: 400,
+ message: `Cannot preload more than ${Config.get().limits.message.maxPreloadCount} channels at once.`,
+ });
+
+ const messages = (
+ await Promise.all(
+ body.channels.map(
+ async (channelId) =>
+ await Message.findOne({
+ where: { channel_id: channelId },
+ order: { timestamp: "DESC" },
+ }),
+ ),
+ )
+ ).filter((x) => x !== null) as Message[];
+
+ const filteredMessages = messages.map((message) => {
+ const x = message.toJSON();
+ // https://docs.discord.food/resources/message#preload-messages - reactions are not included in the response
+ // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+ // @ts-expect-error
+ x.reactions = undefined;
+ return x;
+ }) as PreloadMessagesResponseSchema;
+
+ return res.status(200).send(filteredMessages);
+ },
+);
+
+export default router;
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