diff --git a/packages/core/scripts/check-routes.mjs b/packages/core/scripts/check-routes.mjs
new file mode 100644
index 000000000..1cb08866b
--- /dev/null
+++ b/packages/core/scripts/check-routes.mjs
@@ -0,0 +1,34 @@
+import { Routes } from 'discord-api-types/v10';
+import { glob, readFile } from 'node:fs/promises';
+
+const usedRoutes = new Set();
+
+const ignoredRoutes = new Set([
+	// Deprecated
+	'channelPins',
+	'channelPin',
+	'guilds',
+	'guildCurrentMemberNickname',
+	'guildMFA',
+	'nitroStickerPacks',
+]);
+
+for await (const file of glob('src/api/*.ts')) {
+	const content = await readFile(file, 'utf-8');
+
+	const routes = content.matchAll(/Routes\.([\w\d_]+)/g);
+	for (const route of routes) {
+		usedRoutes.add(route[1]);
+	}
+}
+
+const unusedRoutes = Object.keys(Routes).filter((route) => !usedRoutes.has(route) && !ignoredRoutes.has(route));
+
+if (unusedRoutes.length > 0) {
+	console.warn('The following routes are not implemented:');
+	for (const route of unusedRoutes) {
+		console.warn(` - ${route}`);
+	}
+} else {
+	console.log('No missing routes.');
+}
diff --git a/packages/core/src/api/channel.ts b/packages/core/src/api/channel.ts
index e1cbd456e..2d45183e0 100644
--- a/packages/core/src/api/channel.ts
+++ b/packages/core/src/api/channel.ts
@@ -1,10 +1,9 @@
 /* eslint-disable jsdoc/check-param-names */
 
-import { makeURLSearchParams, type RawFile, type REST, type RequestData } from '@discordjs/rest';
+import { makeURLSearchParams, type RawFile, type RequestData, type REST } from '@discordjs/rest';
 import {
 	Routes,
-	type RESTPostAPIChannelWebhookJSONBody,
-	type RESTPostAPIChannelWebhookResult,
+	type APIThreadChannel,
 	type RESTDeleteAPIChannelResult,
 	type RESTGetAPIChannelInvitesResult,
 	type RESTGetAPIChannelMessageReactionUsersQuery,
@@ -17,8 +16,8 @@ import {
 	type RESTGetAPIChannelThreadsArchivedQuery,
 	type RESTGetAPIChannelUsersThreadsArchivedResult,
 	type RESTGetAPIChannelWebhooksResult,
-	type RESTPatchAPIChannelMessageJSONBody,
 	type RESTPatchAPIChannelJSONBody,
+	type RESTPatchAPIChannelMessageJSONBody,
 	type RESTPatchAPIChannelMessageResult,
 	type RESTPatchAPIChannelResult,
 	type RESTPostAPIChannelFollowersResult,
@@ -27,12 +26,14 @@ import {
 	type RESTPostAPIChannelMessageCrosspostResult,
 	type RESTPostAPIChannelMessageJSONBody,
 	type RESTPostAPIChannelMessageResult,
-	type RESTPutAPIChannelPermissionJSONBody,
-	type Snowflake,
 	type RESTPostAPIChannelThreadsJSONBody,
 	type RESTPostAPIChannelThreadsResult,
-	type APIThreadChannel,
+	type RESTPostAPIChannelWebhookJSONBody,
+	type RESTPostAPIChannelWebhookResult,
 	type RESTPostAPIGuildForumThreadsJSONBody,
+	type RESTPutAPIChannelPermissionJSONBody,
+	type RESTPutAPIChannelRecipientJSONBody,
+	type Snowflake,
 } from 'discord-api-types/v10';
 
 export interface StartForumThreadOptions extends RESTPostAPIGuildForumThreadsJSONBody {
@@ -593,4 +594,43 @@ export class ChannelsAPI {
 			signal,
 		});
 	}
+
+	/**
+	 * Adds a recipient to a group DM channel
+	 *
+	 * @see {@link https://discord.com/developers/docs/resources/channel#group-dm-add-recipient}
+	 * @param channelId - The id of the channel to add the recipient to
+	 * @param userId - The id of the user to add as a recipient
+	 * @param body - The data for adding the recipient
+	 * @param options - The options for adding the recipient
+	 */
+	public async addGroupDMRecipient(
+		channelId: Snowflake,
+		userId: Snowflake,
+		body: RESTPutAPIChannelRecipientJSONBody,
+		{ signal }: Pick<RequestData, 'signal'> = {},
+	) {
+		await this.rest.put(Routes.channelRecipient(channelId, userId), {
+			body,
+			signal,
+		});
+	}
+
+	/**
+	 * Removes a recipient from a group DM channel
+	 *
+	 * @see {@link https://discord.com/developers/docs/resources/channel#group-dm-remove-recipient}
+	 * @param channelId - The id of the channel to remove the recipient from
+	 * @param userId - The id of the user to remove as a recipient
+	 * @param options - The options for removing the recipient
+	 */
+	public async removeGroupDMRecipient(
+		channelId: Snowflake,
+		userId: Snowflake,
+		{ signal }: Pick<RequestData, 'signal'> = {},
+	) {
+		await this.rest.delete(Routes.channelRecipient(channelId, userId), {
+			signal,
+		});
+	}
 }