diff --git a/megalodon/src/firefish.ts b/megalodon/src/firefish.ts
index 9d10cdff..d0184ded 100644
--- a/megalodon/src/firefish.ts
+++ b/megalodon/src/firefish.ts
@@ -617,6 +617,13 @@ export default class Firefish implements MegalodonInterface {
     })
   }
 
+  public async lookupAccount(_acct: string): Promise<Response<Entity.Account>> {
+    return new Promise((_, reject) => {
+      const err = new NotImplementedError('Firefish does not support this method')
+      reject(err)
+    })
+  }
+
   // ======================================
   // accounts/bookmarks
   // ======================================
diff --git a/megalodon/src/friendica.ts b/megalodon/src/friendica.ts
index fd29e943..8d153547 100644
--- a/megalodon/src/friendica.ts
+++ b/megalodon/src/friendica.ts
@@ -738,6 +738,13 @@ export default class Friendica implements MegalodonInterface {
     })
   }
 
+  public async lookupAccount(_acct: string): Promise<Response<Entity.Account>> {
+    return new Promise((_, reject) => {
+      const err = new NotImplementedError('Friendica does not support this method')
+      reject(err)
+    })
+  }
+
   // ======================================
   // accounts/bookmarks
   // ======================================
diff --git a/megalodon/src/gotosocial.ts b/megalodon/src/gotosocial.ts
index 4a452a89..fe5b808f 100644
--- a/megalodon/src/gotosocial.ts
+++ b/megalodon/src/gotosocial.ts
@@ -728,6 +728,20 @@ export default class Gotosocial implements MegalodonInterface {
     })
   }
 
+  /**
+   * GET /api/v1/accounts/lookup
+   *
+   * @param acct The username or Webfinger address to lookup.
+   * @return Account.
+   */
+  public async lookupAccount(acct: string): Promise<Response<Entity.Account>> {
+    return this.client.get<GotosocialAPI.Entity.Account>(`/api/v1/accounts/lookup?acct=${acct}`).then(res => {
+      return Object.assign(res, {
+        data: GotosocialAPI.Converter.account(res.data)
+      })
+    })
+  }
+
   // ======================================
   // accounts/bookmarks
   // ======================================
diff --git a/megalodon/src/mastodon.ts b/megalodon/src/mastodon.ts
index 8ca97e7e..70e0f6ba 100644
--- a/megalodon/src/mastodon.ts
+++ b/megalodon/src/mastodon.ts
@@ -817,6 +817,20 @@ export default class Mastodon implements MegalodonInterface {
     })
   }
 
+  /**
+   * GET /api/v1/accounts/lookup
+   *
+   * @param acct The username or Webfinger address to lookup.
+   * @return Account.
+   */
+  public async lookupAccount(acct: string): Promise<Response<Entity.Account>> {
+    return this.client.get<MastodonAPI.Entity.Account>(`/api/v1/accounts/lookup?acct=${acct}`).then(res => {
+      return Object.assign(res, {
+        data: MastodonAPI.Converter.account(res.data)
+      })
+    })
+  }
+
   // ======================================
   // accounts/bookmarks
   // ======================================
diff --git a/megalodon/src/megalodon.ts b/megalodon/src/megalodon.ts
index 2ac3f408..678d41b5 100644
--- a/megalodon/src/megalodon.ts
+++ b/megalodon/src/megalodon.ts
@@ -367,6 +367,14 @@ export interface MegalodonInterface {
       since_id?: string
     }
   ): Promise<Response<Array<Entity.Account>>>
+  /**
+   * Lookup account ID from Webfinger address.
+   *
+   * @param acct Webfinger address.
+   * @return Account
+   */
+  lookupAccount(acct: string): Promise<Response<Entity.Account>>
+
   // ======================================
   // accounts/bookmarks
   // ======================================
diff --git a/megalodon/src/pleroma.ts b/megalodon/src/pleroma.ts
index fe986f50..6259bbb2 100644
--- a/megalodon/src/pleroma.ts
+++ b/megalodon/src/pleroma.ts
@@ -815,6 +815,20 @@ export default class Pleroma implements MegalodonInterface {
     })
   }
 
+  /**
+   * GET /api/v1/accounts/lookup
+   *
+   * @param acct The username or Webfinger address to lookup.
+   * @return Account.
+   */
+  public async lookupAccount(acct: string): Promise<Response<Entity.Account>> {
+    return this.client.get<PleromaAPI.Entity.Account>(`/api/v1/accounts/lookup?acct=${acct}`).then(res => {
+      return Object.assign(res, {
+        data: PleromaAPI.Converter.account(res.data)
+      })
+    })
+  }
+
   // ======================================
   // accounts/bookmarks
   // ======================================