diff --git a/src/app.ts b/src/app.ts
index 5d29f8ca..5fb376dc 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -27,6 +27,7 @@ import {
 } from '@/controllers/api/accounts.ts';
 import { adminAccountsController } from '@/controllers/api/admin.ts';
 import { appCredentialsController, createAppController } from '@/controllers/api/apps.ts';
+import { blocksController } from '@/controllers/api/blocks.ts';
 import { bookmarksController } from '@/controllers/api/bookmarks.ts';
 import { emptyArrayController, emptyObjectController, notImplementedController } from '@/controllers/api/fallback.ts';
 import { instanceController } from '@/controllers/api/instance.ts';
@@ -77,6 +78,8 @@ import { cache } from '@/middleware/cache.ts';
 import { csp } from '@/middleware/csp.ts';
 import { adminRelaysController, adminSetRelaysController } from '@/controllers/api/ditto.ts';
 import { storeMiddleware } from '@/middleware/store.ts';
+import { blockController } from '@/controllers/api/accounts.ts';
+import { unblockController } from '@/controllers/api/accounts.ts';
 
 interface AppEnv extends HonoEnv {
   Variables: {
@@ -139,6 +142,8 @@ app.patch('/api/v1/accounts/update_credentials', requirePubkey, updateCredential
 app.get('/api/v1/accounts/search', accountSearchController);
 app.get('/api/v1/accounts/lookup', accountLookupController);
 app.get('/api/v1/accounts/relationships', requirePubkey, relationshipsController);
+app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/block', requirePubkey, blockController);
+app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/unblock', requirePubkey, unblockController);
 app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/mute', requirePubkey, muteController);
 app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/unmute', requirePubkey, unmuteController);
 app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/follow', requirePubkey, followController);
@@ -182,6 +187,7 @@ app.get('/api/v1/trends', cache({ cacheName: 'web', expires: Time.minutes(15) })
 app.get('/api/v1/notifications', requirePubkey, notificationsController);
 app.get('/api/v1/favourites', requirePubkey, favouritesController);
 app.get('/api/v1/bookmarks', requirePubkey, bookmarksController);
+app.get('/api/v1/blocks', requirePubkey, blocksController);
 app.get('/api/v1/mutes', requirePubkey, mutesController);
 
 app.get('/api/v1/admin/accounts', requireRole('admin'), adminAccountsController);
diff --git a/src/controllers/api/accounts.ts b/src/controllers/api/accounts.ts
index 93455b7f..70e6c6dd 100644
--- a/src/controllers/api/accounts.ts
+++ b/src/controllers/api/accounts.ts
@@ -272,6 +272,16 @@ const followingController: AppController = async (c) => {
   return renderAccounts(c, pubkeys);
 };
 
+/** https://docs.joinmastodon.org/methods/accounts/#block */
+const blockController: AppController = (c) => {
+  return c.json({ error: 'Blocking is not supported by Nostr' }, 422);
+};
+
+/** https://docs.joinmastodon.org/methods/accounts/#unblock */
+const unblockController: AppController = (c) => {
+  return c.json({ error: 'Blocking is not supported by Nostr' }, 422);
+};
+
 /** https://docs.joinmastodon.org/methods/accounts/#mute */
 const muteController: AppController = async (c) => {
   const sourcePubkey = c.get('pubkey')!;
@@ -328,6 +338,7 @@ export {
   accountLookupController,
   accountSearchController,
   accountStatusesController,
+  blockController,
   createAccountController,
   favouritesController,
   followController,
@@ -335,6 +346,7 @@ export {
   followingController,
   muteController,
   relationshipsController,
+  unblockController,
   unfollowController,
   unmuteController,
   updateCredentialsController,
diff --git a/src/controllers/api/blocks.ts b/src/controllers/api/blocks.ts
new file mode 100644
index 00000000..b006a1da
--- /dev/null
+++ b/src/controllers/api/blocks.ts
@@ -0,0 +1,6 @@
+import { AppController } from '@/app.ts';
+
+/** https://docs.joinmastodon.org/methods/blocks/#get */
+export const blocksController: AppController = (c) => {
+  return c.json({ error: 'Blocking is not supported by Nostr' }, 422);
+};