diff --git a/src/api/routes/applications/#application_id/commands/#command_id/index.ts b/src/api/routes/applications/#application_id/commands/#command_id/index.ts
new file mode 100644
index 00000000..80700ed6
--- /dev/null
+++ b/src/api/routes/applications/#application_id/commands/#command_id/index.ts
@@ -0,0 +1,122 @@
+/*
+  Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+  Copyright (C) 2023 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 { ApplicationCommandCreateSchema, ApplicationCommandSchema } from "@spacebar/schemas";
+import { route } from "@spacebar/api";
+import { Request, Response, Router } from "express";
+import { Application, ApplicationCommand, FieldErrors, Snowflake } from "@spacebar/util";
+
+const router = Router({ mergeParams: true });
+
+router.get("/", route({}), async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const command = await ApplicationCommand.findOne({ where: { application_id: req.params.application_id, id: req.params.command_id } });
+
+	if (!command) {
+		res.status(404).send({ code: 404, message: "Unknown application command" });
+		return;
+	}
+
+	res.send(command);
+});
+
+router.patch(
+	"/",
+	route({
+		requestBody: "ApplicationCommandCreateSchema",
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, id: req.params.command_id } });
+
+		if (!commandExists) {
+			res.status(404).send({ code: 404, message: "Unknown application command" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema;
+
+		if (!body.type) {
+			body.type = 1;
+		}
+
+		if (body.name.length < 1 || body.name.length > 32) {
+			// TODO: configurable?
+			throw FieldErrors({
+				username: {
+					code: "BASE_TYPE_BAD_LENGTH",
+					message: `Must be between 1 and 32 in length.`,
+				},
+			});
+		}
+
+		const commandForDb: ApplicationCommandSchema = {
+			application_id: req.params.application_id,
+			name: body.name,
+			name_localizations: body.name_localizations,
+			description: body.description || "",
+			description_localizations: body.description_localizations,
+			default_member_permissions: body.default_member_permissions || null,
+			contexts: body.contexts,
+			dm_permission: body.dm_permission || true,
+			global_popularity_rank: 1,
+			handler: body.handler,
+			integration_types: body.integration_types,
+			nsfw: body.nsfw,
+			options: body.options,
+			type: body.type,
+			version: Snowflake.generate(),
+		};
+
+		await ApplicationCommand.update({ name: body.name }, commandForDb);
+		res.send(commandForDb);
+	},
+);
+
+router.delete("/", async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, id: req.params.command_id } });
+
+	if (!commandExists) {
+		res.status(404).send({ code: 404, message: "Unknown application command" });
+		return;
+	}
+
+	await ApplicationCommand.delete({ application_id: req.params.application_id, id: req.params.command_id });
+	res.sendStatus(204);
+});
+
+export default router;
diff --git a/src/api/routes/applications/#application_id/commands/index.ts b/src/api/routes/applications/#application_id/commands/index.ts
new file mode 100644
index 00000000..50113cee
--- /dev/null
+++ b/src/api/routes/applications/#application_id/commands/index.ts
@@ -0,0 +1,160 @@
+/*
+	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+	Copyright (C) 2023 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 { ApplicationCommandCreateSchema, ApplicationCommandSchema } from "@spacebar/schemas";
+import { route } from "@spacebar/api";
+import { Request, Response, Router } from "express";
+import { Application, ApplicationCommand, FieldErrors, Snowflake } from "@spacebar/util";
+
+const router = Router({ mergeParams: true });
+
+router.get("/", route({}), async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const command = await ApplicationCommand.find({ where: { application_id: req.params.application_id } });
+	res.send(command);
+});
+
+router.post(
+	"/",
+	route({
+		requestBody: "ApplicationCommandCreateSchema",
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema;
+
+		if (!body.type) {
+			body.type = 1;
+		}
+
+		if (body.name.length < 1 || body.name.length > 32) {
+			// TODO: configurable?
+			throw FieldErrors({
+				username: {
+					code: "BASE_TYPE_BAD_LENGTH",
+					message: `Must be between 1 and 32 in length.`,
+				},
+			});
+		}
+
+		const commandForDb: ApplicationCommandSchema = {
+			application_id: req.params.application_id,
+			name: body.name,
+			name_localizations: body.name_localizations,
+			description: body.description || "",
+			description_localizations: body.description_localizations,
+			default_member_permissions: body.default_member_permissions || null,
+			contexts: body.contexts,
+			dm_permission: body.dm_permission || true,
+			global_popularity_rank: 1,
+			handler: body.handler,
+			integration_types: body.integration_types,
+			nsfw: body.nsfw,
+			options: body.options,
+			type: body.type,
+			version: Snowflake.generate(),
+		};
+
+		const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, name: body.name } });
+
+		if (commandExists) {
+			await ApplicationCommand.update({ application_id: req.params.application_id, name: body.name }, commandForDb);
+		} else {
+			commandForDb.id = Snowflake.generate(); // Have to be done that way so the id doesn't change
+			await ApplicationCommand.save(commandForDb);
+		}
+
+		res.send(body);
+	},
+);
+
+router.put(
+	"/",
+	route({
+		// requestBody: "ApplicationCommandCreateSchema", // How to make this array?
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema[];
+
+		for (const command of body) {
+			if (!command.type) {
+				command.type = 1;
+			}
+
+			if (command.name.length < 1 || command.name.length > 32) {
+				// TODO: configurable?
+				throw FieldErrors({
+					username: {
+						code: "BASE_TYPE_BAD_LENGTH",
+						message: `Must be between 1 and 32 in length.`,
+					},
+				});
+			}
+
+			const commandForDb: ApplicationCommandSchema = {
+				application_id: req.params.application_id,
+				name: command.name,
+				name_localizations: command.name_localizations,
+				description: command.description || "",
+				description_localizations: command.description_localizations,
+				default_member_permissions: command.default_member_permissions || null,
+				contexts: command.contexts,
+				dm_permission: command.dm_permission || true,
+				global_popularity_rank: 1,
+				handler: command.handler,
+				integration_types: command.integration_types,
+				nsfw: command.nsfw,
+				options: command.options,
+				type: command.type,
+				version: Snowflake.generate(),
+			};
+
+			const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, name: command.name } });
+
+			if (commandExists) {
+				await ApplicationCommand.update({ application_id: req.params.application_id, name: command.name }, commandForDb);
+			} else {
+				commandForDb.id = Snowflake.generate(); // Have to be done that way so the id doesn't change
+				await ApplicationCommand.save(commandForDb);
+			}
+		}
+
+		res.send(body);
+	},
+);
+
+export default router;
diff --git a/src/api/routes/applications/#application_id/guilds/#guild_id/commands/#command_id/index.ts b/src/api/routes/applications/#application_id/guilds/#guild_id/commands/#command_id/index.ts
new file mode 100644
index 00000000..c041e18b
--- /dev/null
+++ b/src/api/routes/applications/#application_id/guilds/#guild_id/commands/#command_id/index.ts
@@ -0,0 +1,145 @@
+/*
+  Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+  Copyright (C) 2023 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 { ApplicationCommandCreateSchema, ApplicationCommandSchema } from "@spacebar/schemas";
+import { route } from "@spacebar/api";
+import { Request, Response, Router } from "express";
+import { Application, ApplicationCommand, FieldErrors, Guild, Snowflake } from "@spacebar/util";
+
+const router = Router({ mergeParams: true });
+
+router.get("/", route({}), async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+	if (!guildExists) {
+		res.status(404).send({ code: 404, message: "Unknown guild" });
+		return;
+	}
+
+	const command = await ApplicationCommand.findOne({ where: { application_id: req.params.application_id, id: req.params.command_id, guild_id: req.params.guild_id } });
+
+	if (!command) {
+		res.status(404).send({ code: 404, message: "Unknown application command" });
+		return;
+	}
+
+	res.send(command);
+});
+
+router.patch(
+	"/",
+	route({
+		requestBody: "ApplicationCommandCreateSchema",
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+		if (!guildExists) {
+			res.status(404).send({ code: 404, message: "Unknown guild" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema;
+
+		if (!body.type) {
+			body.type = 1;
+		}
+
+		if (body.name.length < 1 || body.name.length > 32) {
+			// TODO: configurable?
+			throw FieldErrors({
+				username: {
+					code: "BASE_TYPE_BAD_LENGTH",
+					message: `Must be between 1 and 32 in length.`,
+				},
+			});
+		}
+
+		const commandForDb: ApplicationCommandSchema = {
+			application_id: req.params.application_id,
+			name: body.name,
+			name_localizations: body.name_localizations,
+			description: body.description || "",
+			description_localizations: body.description_localizations,
+			default_member_permissions: body.default_member_permissions || null,
+			contexts: body.contexts,
+			dm_permission: body.dm_permission || true,
+			global_popularity_rank: 1,
+			handler: body.handler,
+			integration_types: body.integration_types,
+			nsfw: body.nsfw,
+			options: body.options,
+			type: body.type,
+			version: Snowflake.generate(),
+		};
+
+		const commandExists = await ApplicationCommand.exists({
+			where: { application_id: req.params.application_id, guild_id: req.params.guild_id, id: req.params.command_id, name: body.name },
+		});
+
+		if (!commandExists) {
+			res.status(404).send({ code: 404, message: "Unknown application command" });
+			return;
+		}
+
+		await ApplicationCommand.update({ application_id: req.params.application_id, guild_id: req.params.guild_id, id: req.params.command_id, name: body.name }, commandForDb);
+		res.send(commandForDb);
+	},
+);
+
+router.delete("/", async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+	if (!guildExists) {
+		res.status(404).send({ code: 404, message: "Unknown guild" });
+		return;
+	}
+
+	const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, guild_id: req.params.guild_id, id: req.params.command_id } });
+
+	if (!commandExists) {
+		res.status(404).send({ code: 404, message: "Unknown application command" });
+		return;
+	}
+
+	await ApplicationCommand.delete({ application_id: req.params.application_id, guild_id: req.params.guild_id, id: req.params.command_id });
+	res.sendStatus(204);
+});
+
+export default router;
diff --git a/src/api/routes/applications/#application_id/guilds/#guild_id/commands/index.ts b/src/api/routes/applications/#application_id/guilds/#guild_id/commands/index.ts
new file mode 100644
index 00000000..bb521980
--- /dev/null
+++ b/src/api/routes/applications/#application_id/guilds/#guild_id/commands/index.ts
@@ -0,0 +1,183 @@
+/*
+	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+	Copyright (C) 2023 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 { ApplicationCommandCreateSchema, ApplicationCommandSchema } from "@spacebar/schemas";
+import { route } from "@spacebar/api";
+import { Request, Response, Router } from "express";
+import { Application, ApplicationCommand, FieldErrors, Guild, Snowflake } from "@spacebar/util";
+
+const router = Router({ mergeParams: true });
+
+router.get("/", route({}), async (req: Request, res: Response) => {
+	const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+	if (!applicationExists) {
+		res.status(404).send({ code: 404, message: "Unknown application" });
+		return;
+	}
+
+	const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+	if (!guildExists) {
+		res.status(404).send({ code: 404, message: "Unknown guild" });
+		return;
+	}
+
+	const command = await ApplicationCommand.find({ where: { application_id: req.params.application_id, guild_id: req.params.guild_id } });
+	res.send(command);
+});
+
+router.post(
+	"/",
+	route({
+		requestBody: "ApplicationCommandCreateSchema",
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+		if (!guildExists) {
+			res.status(404).send({ code: 404, message: "Unknown guild" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema;
+
+		if (!body.type) {
+			body.type = 1;
+		}
+
+		if (body.name.length < 1 || body.name.length > 32) {
+			// TODO: configurable?
+			throw FieldErrors({
+				username: {
+					code: "BASE_TYPE_BAD_LENGTH",
+					message: `Must be between 1 and 32 in length.`,
+				},
+			});
+		}
+
+		const commandForDb: ApplicationCommandSchema = {
+			application_id: req.params.application_id,
+			guild_id: req.params.guild_id,
+			name: body.name,
+			name_localizations: body.name_localizations,
+			description: body.description || "",
+			description_localizations: body.description_localizations,
+			default_member_permissions: body.default_member_permissions || null,
+			contexts: body.contexts,
+			dm_permission: body.dm_permission || true,
+			global_popularity_rank: 1,
+			handler: body.handler,
+			integration_types: body.integration_types,
+			nsfw: body.nsfw,
+			options: body.options,
+			type: body.type,
+			version: Snowflake.generate(),
+		};
+
+		const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, guild_id: req.params.guild_id, name: body.name } });
+
+		if (commandExists) {
+			await ApplicationCommand.update({ application_id: req.params.application_id, guild_id: req.params.guild_id, name: body.name }, commandForDb);
+		} else {
+			commandForDb.id = Snowflake.generate(); // Have to be done that way so the id doesn't change
+			await ApplicationCommand.save(commandForDb);
+		}
+
+		res.send(body);
+	},
+);
+
+router.put(
+	"/",
+	route({
+		// requestBody: "ApplicationCommandCreateSchema", // How to make this array?
+	}),
+	async (req: Request, res: Response) => {
+		const applicationExists = await Application.exists({ where: { id: req.params.application_id } });
+
+		if (!applicationExists) {
+			res.status(404).send({ code: 404, message: "Unknown application" });
+			return;
+		}
+
+		const guildExists = await Guild.exists({ where: { id: req.params.guild_id } });
+
+		if (!guildExists) {
+			res.status(404).send({ code: 404, message: "Unknown guild" });
+			return;
+		}
+
+		const body = req.body as ApplicationCommandCreateSchema[];
+
+		for (const command of body) {
+			if (!command.type) {
+				command.type = 1;
+			}
+
+			if (command.name.length < 1 || command.name.length > 32) {
+				// TODO: configurable?
+				throw FieldErrors({
+					username: {
+						code: "BASE_TYPE_BAD_LENGTH",
+						message: `Must be between 1 and 32 in length.`,
+					},
+				});
+			}
+
+			const commandForDb: ApplicationCommandSchema = {
+				application_id: req.params.application_id,
+				guild_id: req.params.guild_id,
+				name: command.name,
+				name_localizations: command.name_localizations,
+				description: command.description || "",
+				description_localizations: command.description_localizations,
+				default_member_permissions: command.default_member_permissions || null,
+				contexts: command.contexts,
+				dm_permission: command.dm_permission || true,
+				global_popularity_rank: 1,
+				handler: command.handler,
+				integration_types: command.integration_types,
+				nsfw: command.nsfw,
+				options: command.options,
+				type: command.type,
+				version: Snowflake.generate(),
+			};
+
+			const commandExists = await ApplicationCommand.exists({ where: { application_id: req.params.application_id, guild_id: req.params.guild_id, name: command.name } });
+
+			if (commandExists) {
+				await ApplicationCommand.update({ application_id: req.params.application_id, guild_id: req.params.guild_id, name: command.name }, commandForDb);
+			} else {
+				commandForDb.id = Snowflake.generate(); // Have to be done that way so the id doesn't change
+				await ApplicationCommand.save(commandForDb);
+			}
+		}
+
+		res.send(body);
+	},
+);
+
+export default router;