diff --git a/docs/self-service-room-creation-rules.md b/docs/self-service-room-creation-rules.md
index 6292fe7..1638f09 100644
--- a/docs/self-service-room-creation-rules.md
+++ b/docs/self-service-room-creation-rules.md
@@ -63,8 +63,8 @@ Pressing buttons on web or using the /invite command on a guild will insert a ro
 
 So here's all the technical changes needed to support self-service in v3:
 
-- New guild_active table showing whether, and how, a guild is bridged
+- New guild_active table showing whether, and how, a guild is bridged.
 - When /invite command is used, INSERT OR IGNORE INTO state 1 and ensureRoom + ensureSpace.
 - When bot is added through "easy mode" web button, REPLACE INTO state 1 and ensureSpace.
-- When bot is added through "self-service" web button, REPLACE INTO state 2.
-- Event dispatcher will only ensureRoom if the guild_active state is 1
+- When bot is added through "self-service" web button, REPLACE INTO state 0.
+- Event dispatcher will only ensureRoom if the guild_active state is 1.
diff --git a/src/d2m/actions/create-room.js b/src/d2m/actions/create-room.js
index 509d0ff..9be489b 100644
--- a/src/d2m/actions/create-room.js
+++ b/src/d2m/actions/create-room.js
@@ -279,6 +279,17 @@ function channelToGuild(channel) {
 	return guild
 }
 
+/**
+ * @param {string} channelID
+ * @param {string} guildID
+ */
+function existsOrAutocreatable(channelID, guildID) {
+	const existing = select("channel_room", ["room_id", "thread_parent"], {channel_id: channelID}).get()
+	if (existing) return existing
+	const autocreate = select("guild_active", "autocreate", {guild_id: guildID}).pluck().get()
+	return autocreate
+}
+
 /*
 	Ensure flow:
 	1. Get IDs
@@ -297,6 +308,7 @@ function channelToGuild(channel) {
 */
 
 /**
+ * Create room and/or sync room data. Please check that a channel_room entry exists or autocreate = 1 before calling this.
  * @param {string} channelID
  * @param {boolean} shouldActuallySync false if just need to ensure room exists (which is a quick database check), true if also want to sync room data when it does exist (slow)
  * @returns {Promise<string>} room ID
@@ -311,9 +323,17 @@ async function _syncRoom(channelID, shouldActuallySync) {
 		await inflightRoomCreate.get(channelID) // just waiting, and then doing a new db query afterwards, is the simplest way of doing it
 	}
 
-	const existing = select("channel_room", ["room_id", "thread_parent"], {channel_id: channelID}).get()
+	const existing = existsOrAutocreatable(channelID, guild.id)
+
+	if (existing === 0) {
+		throw new Error("refusing to create a new matrix room when autocreate is deactivated")
+	}
 
 	if (!existing) {
+		throw new Error("refusing to craete a new matrix room when there is no guild_active entry")
+	}
+
+	if (existing === 1) {
 		const creation = (async () => {
 			const {spaceID, privacyLevel, channelKState} = await channelToKState(channel, guild, {api})
 			const roomID = await createRoom(channel, guild, spaceID, channelKState, privacyLevel)
@@ -353,12 +373,12 @@ async function _syncRoom(channelID, shouldActuallySync) {
 	return roomID
 }
 
-/** Ensures the room exists. If it doesn't, creates the room with an accurate initial state. */
+/** Ensures the room exists. If it doesn't, creates the room with an accurate initial state. Please check that a channel_room entry exists or guild autocreate = 1 before calling this. */
 function ensureRoom(channelID) {
 	return _syncRoom(channelID, false)
 }
 
-/** Actually syncs. Gets all room state from the homeserver in order to diff, and uploads the icon to mxc if it has changed. */
+/** Actually syncs. Gets all room state from the homeserver in order to diff, and uploads the icon to mxc if it has changed. Please check that a channel_room entry exists or guild autocreate = 1 before calling this. */
 function syncRoom(channelID) {
 	return _syncRoom(channelID, true)
 }
diff --git a/src/db/orm-defs.d.ts b/src/db/orm-defs.d.ts
index 02003af..b1e6b79 100644
--- a/src/db/orm-defs.d.ts
+++ b/src/db/orm-defs.d.ts
@@ -35,7 +35,7 @@ export type Models = {
 
 	guild_active: {
 		guild_id: string
-		autocreate: number
+		autocreate: 0 | 1
 	}
 
 	lottie: {
diff --git a/src/discord/interactions/invite.js b/src/discord/interactions/invite.js
index 689ea1a..ce80e99 100644
--- a/src/discord/interactions/invite.js
+++ b/src/discord/interactions/invite.js
@@ -4,6 +4,10 @@ const DiscordTypes = require("discord-api-types/v10")
 const assert = require("assert/strict")
 const {discord, sync, db, select, from} = require("../../passthrough")
 
+/** @type {import("../../d2m/actions/create-room")} */
+const createRoom = sync.require("../../d2m/actions/create-room")
+/** @type {import("../../d2m/actions/create-space")} */
+const createSpace = sync.require("../../d2m/actions/create-space")
 /** @type {import("../../matrix/api")} */
 const api = sync.require("../../matrix/api")
 
@@ -12,17 +16,6 @@ const api = sync.require("../../matrix/api")
  * @returns {Promise<DiscordTypes.APIInteractionResponse>}
  */
 async function _interact({data, channel, guild_id}) {
-	// Check guild is bridged
-	const spaceID = select("guild_space", "space_id", {guild_id}).pluck().get()
-	const roomID = select("channel_room", "room_id", {channel_id: channel.id}).pluck().get()
-	if (!spaceID || !roomID) return {
-		type: DiscordTypes.InteractionResponseType.ChannelMessageWithSource,
-		data: {
-			content: "This server isn't bridged to Matrix, so you can't invite Matrix users.",
-			flags: DiscordTypes.MessageFlags.Ephemeral
-		}
-	}
-
 	// Get named MXID
 	/** @type {DiscordTypes.APIApplicationCommandInteractionDataStringOption[] | undefined} */ // @ts-ignore
 	const options = data.options
@@ -36,6 +29,13 @@ async function _interact({data, channel, guild_id}) {
 		}
 	}
 
+	// Ensure guild and room are bridged
+	db.prepare("INSERT OR IGNORE INTO guild_active (guild_id, autocreate) VALUES (?, 1)").run(guild_id)
+	const roomID = await createRoom.ensureRoom(channel.id)
+	assert(roomID)
+	const spaceID = select("guild_space", "space_id", {guild_id}).pluck().get()
+	assert(spaceID)
+
 	// Check for existing invite to the space
 	let spaceMember
 	try {