diff --git a/keyserver/src/responders/relationship-responders.js b/keyserver/src/responders/relationship-responders.js
--- a/keyserver/src/responders/relationship-responders.js
+++ b/keyserver/src/responders/relationship-responders.js
@@ -1,19 +1,20 @@
 // @flow
 
-import t, { type TInterface } from 'tcomb';
+import t, { type TInterface, type TUnion } from 'tcomb';
 
 import {
   type TraditionalRelationshipRequest,
   type RelationshipErrors,
   traditionalRelationshipActionsList,
   type RelationshipRequest,
+  farcasterRelationshipRequestValidator,
 } from 'lib/types/relationship-types.js';
 import { tShape } from 'lib/utils/validation-utils.js';
 
 import type { Viewer } from '../session/viewer.js';
 import { updateRelationships } from '../updaters/relationship-updaters.js';
 
-export const updateRelationshipInputValidator: TInterface<TraditionalRelationshipRequest> =
+export const traditionalRelationshipRequestValidator: TInterface<TraditionalRelationshipRequest> =
   tShape<TraditionalRelationshipRequest>({
     action: t.enums.of(
       traditionalRelationshipActionsList,
@@ -22,6 +23,12 @@
     userIDs: t.list(t.String),
   });
 
+export const updateRelationshipInputValidator: TUnion<RelationshipRequest> =
+  t.union([
+    traditionalRelationshipRequestValidator,
+    farcasterRelationshipRequestValidator,
+  ]);
+
 export const relationshipErrorsValidator: TInterface<RelationshipErrors> =
   tShape<RelationshipErrors>({
     invalid_user: t.maybe(t.list(t.String)),
diff --git a/lib/types/relationship-types.js b/lib/types/relationship-types.js
--- a/lib/types/relationship-types.js
+++ b/lib/types/relationship-types.js
@@ -88,7 +88,7 @@
   dict => Object.keys(dict).length === 2,
 );
 
-export const updateFarcasterRelationshipInputValidator: TInterface<FarcasterRelationshipRequest> =
+export const farcasterRelationshipRequestValidator: TInterface<FarcasterRelationshipRequest> =
   tShape<FarcasterRelationshipRequest>({
     action: tString('farcaster'),
     userIDsToFID: exactlyTwoDictEntriesValidator,
diff --git a/lib/types/relationship-types.test.js b/lib/types/relationship-types.test.js
--- a/lib/types/relationship-types.test.js
+++ b/lib/types/relationship-types.test.js
@@ -1,6 +1,6 @@
 // @flow
 
-import { updateFarcasterRelationshipInputValidator } from './relationship-types.js';
+import { farcasterRelationshipRequestValidator } from './relationship-types.js';
 
 describe('updateFarcasterRelationshipInputValidator', () => {
   test('SHOULD validate input with exactly 2 userIDsToFID entries', () => {
@@ -11,7 +11,7 @@
         '512': 'f512',
       },
     };
-    expect(updateFarcasterRelationshipInputValidator.is(input)).toBe(true);
+    expect(farcasterRelationshipRequestValidator.is(input)).toBe(true);
   });
 
   test('SHOULD NOT validate input with > 2 userIDsToFID entries', () => {
@@ -23,7 +23,7 @@
         '1024': 'f1024',
       },
     };
-    expect(updateFarcasterRelationshipInputValidator.is(input)).toBe(false);
+    expect(farcasterRelationshipRequestValidator.is(input)).toBe(false);
   });
 
   test('SHOULD NOT validate input with < 2 userIDsToFID entries', () => {
@@ -33,7 +33,7 @@
         '256': 'f256',
       },
     };
-    expect(updateFarcasterRelationshipInputValidator.is(input)).toBe(false);
+    expect(farcasterRelationshipRequestValidator.is(input)).toBe(false);
   });
 
   test('Should not validate if action is not farcaster', () => {
@@ -44,6 +44,6 @@
         '512': 'f512',
       },
     };
-    expect(updateFarcasterRelationshipInputValidator.is(input)).toBe(false);
+    expect(farcasterRelationshipRequestValidator.is(input)).toBe(false);
   });
 });