diff --git a/invokeai/frontend/web/src/features/nodes/util/graph/generation/Graph.ts b/invokeai/frontend/web/src/features/nodes/util/graph/generation/Graph.ts
index 7d007c74bd..db94b946e8 100644
--- a/invokeai/frontend/web/src/features/nodes/util/graph/generation/Graph.ts
+++ b/invokeai/frontend/web/src/features/nodes/util/graph/generation/Graph.ts
@@ -9,6 +9,7 @@ import type {
   AnyInvocationInputField,
   AnyInvocationOutputField,
   AnyModelConfig,
+  CoreMetadataFields,
   InputFields,
   Invocation,
   InvocationType,
@@ -433,7 +434,7 @@ export class Graph {
   addEdgeToMetadata<TFrom extends AnyInvocation>(
     fromNode: TFrom,
     fromField: OutputFields<TFrom>,
-    metadataField: string
+    metadataField: CoreMetadataFields | (string & Record<string, never>)
   ): Edge {
     // @ts-expect-error `Graph` excludes `core_metadata` nodes due to its excessively wide typing
     return this.addEdge(fromNode, fromField, this.getMetadataNode(), metadataField);
diff --git a/invokeai/frontend/web/src/services/api/types.ts b/invokeai/frontend/web/src/services/api/types.ts
index 7bb5bf045b..640d0509a9 100644
--- a/invokeai/frontend/web/src/services/api/types.ts
+++ b/invokeai/frontend/web/src/services/api/types.ts
@@ -322,6 +322,15 @@ type NonInputFields = 'id' | 'type' | 'is_intermediate' | 'use_cache' | 'board'
 export type AnyInvocationInputField = Exclude<KeysOfUnion<Required<AnyInvocation>>, NonInputFields>;
 export type InputFields<T extends AnyInvocation> = Extract<keyof T, AnyInvocationInputField>;
 
+type ExcludeIndexSignature<T> = {
+  [K in keyof T as string extends K ? never : K]: T[K];
+};
+
+export type CoreMetadataFields = Exclude<
+  keyof ExcludeIndexSignature<components['schemas']['CoreMetadataInvocation']>,
+  NonInputFields
+>;
+
 type NonOutputFields = 'type';
 export type AnyInvocationOutputField = Exclude<KeysOfUnion<Required<AnyInvocationOutput>>, NonOutputFields>;
 export type OutputFields<T extends AnyInvocation> = Extract<