diff --git a/api/src/app/routes/auth/index.ts b/api/src/app/routes/auth/index.ts
index f13d76e..c679da4 100644
--- a/api/src/app/routes/auth/index.ts
+++ b/api/src/app/routes/auth/index.ts
@@ -102,6 +102,53 @@ const authRoutes: FastifyPluginAsync = async (app) => {
         request
       );
 
+      // Assign library member role if user is in Discord server but doesn't have it
+      const libraryRoleId = process.env.LIBRARY_ROLE_ID;
+      if (inDiscord && guildId && libraryRoleId) {
+        try {
+          const memberResponse = await fetch(
+            `https://discord.com/api/users/@me/guilds/${guildId}/member`,
+            {
+              headers: {
+                Authorization: `Bearer ${tokenResult.token.access_token}`,
+              },
+            }
+          );
+
+          if (memberResponse.ok) {
+            const memberData = await memberResponse.json() as { roles: string[] };
+            const hasLibraryRole = memberData.roles.includes(libraryRoleId);
+
+            if (!hasLibraryRole) {
+              const botToken = process.env.DISCORD_BOT_TOKEN;
+              if (botToken) {
+                const assignRoleResponse = await fetch(
+                  `https://discord.com/api/v10/guilds/${guildId}/members/${userData.id}/roles/${libraryRoleId}`,
+                  {
+                    method: "PUT",
+                    headers: {
+                      Authorization: `Bot ${botToken}`,
+                      "Content-Type": "application/json",
+                    },
+                  }
+                );
+
+                if (assignRoleResponse.ok || assignRoleResponse.status === 204) {
+                  app.log.info(`Assigned library role to user ${user.username} (${user.id})`);
+                } else {
+                  app.log.error(
+                    `Failed to assign library role to user ${user.username}: ${assignRoleResponse.status}`
+                  );
+                }
+              }
+            }
+          }
+        } catch (error) {
+          // Don't fail the login if role assignment fails
+          app.log.error({ err: error }, "Error assigning library role");
+        }
+      }
+
       // Set signed cookies and redirect to frontend
       reply
         .setCookie("auth-token", accessToken, {
diff --git a/dev.env b/dev.env
index d0fc8c4..0d34dec 100644
--- a/dev.env
+++ b/dev.env
@@ -16,6 +16,8 @@ DISCORD_GUILD_ID="op://Environment Variables - Naomi/Library/discord server id"
 SPONSOR_ROLE_ID="op://Environment Variables - Naomi/Library/sponsor role id"
 MOD_ROLE_ID="op://Environment Variables - Naomi/Library/mod role id"
 STAFF_ROLE_ID="op://Environment Variables - Naomi/Library/staff role id"
+DISCORD_BOT_TOKEN="op://Environment Variables - Naomi/Library/discord bot token"
+LIBRARY_ROLE_ID="op://Environment Variables - Naomi/Library/library role id"
 
 # Application URL
 BASE_URL="op://Environment Variables - Naomi/Library/localhost url"
diff --git a/prod.env b/prod.env
index 6e20d68..47ed1f8 100644
--- a/prod.env
+++ b/prod.env
@@ -16,6 +16,8 @@ DISCORD_GUILD_ID="op://Environment Variables - Naomi/Library/discord server id"
 SPONSOR_ROLE_ID="op://Environment Variables - Naomi/Library/sponsor role id"
 MOD_ROLE_ID="op://Environment Variables - Naomi/Library/mod role id"
 STAFF_ROLE_ID="op://Environment Variables - Naomi/Library/staff role id"
+DISCORD_BOT_TOKEN="op://Environment Variables - Naomi/Library/discord bot token"
+LIBRARY_ROLE_ID="op://Environment Variables - Naomi/Library/library role id"
 
 # Application URL
 BASE_URL="op://Environment Variables - Naomi/Library/base url"