diff --git a/striker-ui-api/src/lib/accessModule.ts b/striker-ui-api/src/lib/accessModule.ts
index 0fe44518..1432ffc3 100644
--- a/striker-ui-api/src/lib/accessModule.ts
+++ b/striker-ui-api/src/lib/accessModule.ts
@@ -278,7 +278,7 @@ const getAnvilData = async () => {
 const getFenceSpec = async () => {
   await subroutine('get_fence_data', { pre: ['Striker'] });
 
-  return getData<unknown>('fence_data');
+  return getData<AnvilDataFenceHash>('fence_data');
 };
 
 const getHostData = async () => {
diff --git a/striker-ui-api/src/lib/request_handlers/fence/getFenceTemplate.ts b/striker-ui-api/src/lib/request_handlers/fence/getFenceTemplate.ts
index 7a723fcd..0dfde601 100644
--- a/striker-ui-api/src/lib/request_handlers/fence/getFenceTemplate.ts
+++ b/striker-ui-api/src/lib/request_handlers/fence/getFenceTemplate.ts
@@ -4,10 +4,10 @@ import { getFenceSpec } from '../../accessModule';
 import { stderr } from '../../shell';
 
 export const getFenceTemplate: RequestHandler = async (request, response) => {
-  let rawFenceData;
+  let rFenceData: AnvilDataFenceHash;
 
   try {
-    rawFenceData = await getFenceSpec();
+    rFenceData = await getFenceSpec();
   } catch (subError) {
     stderr(`Failed to get fence device template; CAUSE: ${subError}`);
 
@@ -16,5 +16,5 @@ export const getFenceTemplate: RequestHandler = async (request, response) => {
     return;
   }
 
-  response.status(200).send(rawFenceData);
+  response.status(200).send(rFenceData);
 };
diff --git a/striker-ui-api/src/types/GetAnvilDataFunction.d.ts b/striker-ui-api/src/types/GetAnvilDataFunction.d.ts
index 93b351b5..53433c40 100644
--- a/striker-ui-api/src/types/GetAnvilDataFunction.d.ts
+++ b/striker-ui-api/src/types/GetAnvilDataFunction.d.ts
@@ -33,6 +33,38 @@ type AnvilDataDatabaseHash = {
   };
 };
 
+type AnvilDataFenceParameterType =
+  | 'boolean'
+  | 'integer'
+  | 'second'
+  | 'select'
+  | 'string';
+
+type AnvilDataFenceHash = {
+  [agent: string]: {
+    actions: string[];
+    description: string;
+    parameters: {
+      [parameterId: string]: {
+        content_type: AnvilDataFenceParameterType;
+        default?: string;
+        deprecated: number;
+        description: string;
+        obsoletes: number;
+        options?: string[];
+        replacement: string;
+        required: '0' | '1';
+        switches: string;
+        unique: '0' | '1';
+      };
+    };
+    switch: {
+      [switchId: string]: { name: string };
+    };
+    symlink?: { [agent: string]: string };
+  };
+};
+
 type AnvilDataHostListHash = {
   host_uuid: {
     [hostUuid: string]: {