diff --git a/startos/actions/set-admin-password.ts b/startos/actions/set-admin-password.ts
new file mode 100644
index 0000000..b8ef8b5
--- /dev/null
+++ b/startos/actions/set-admin-password.ts
@@ -0,0 +1,43 @@
+import { sdk } from '../sdk'
+import { store } from '../file-models/store.json'
+
+const { InputSpec, Value } = sdk
+
+export const inputSpec = InputSpec.of({
+  password: Value.text({
+    name: 'Admin password',
+    description: 'Password used to access the Munin Bitcoin web interface',
+    required: true,
+    default: null,
+    masked: true,
+    minLength: 12,
+    placeholder: 'Enter admin password',
+  }),
+})
+
+export const setAdminPassword = sdk.Action.withInput(
+  'set-admin-password',
+
+  async ({ effects }) => ({
+    name: 'Set Admin Password',
+    description: 'Set the password for the Munin Bitcoin admin user',
+    warning: null,
+    allowedStatuses: 'any',
+    group: null,
+    visibility: 'enabled',
+  }),
+
+  inputSpec,
+
+  async ({ effects }) => {
+    const current = await store.read.const(effects)
+    return {
+      password: current?.adminPassword ?? null,
+    }
+  },
+
+  async ({ effects, input }) =>
+    store.merge(effects, {
+      adminPassword: input.password,
+    }),
+)
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