diff --git a/apps/cli/src/caps.rs b/apps/cli/src/caps.rs
index 088a14f7122..a5382c5d92c 100644
--- a/apps/cli/src/caps.rs
+++ b/apps/cli/src/caps.rs
@@ -159,6 +159,17 @@ struct LoomImportArgs {
     format: OutputFormat,
 }
 
+fn loom_import_payload(loom_url: &str, owner_email: Option<&str>, space: Option<&str>) -> Value {
+    let mut payload = json!({ "loomUrl": loom_url });
+    if let Some(owner_email) = owner_email {
+        payload["ownerEmail"] = json!(owner_email);
+    }
+    if let Some(space) = space {
+        payload["spaceName"] = json!(space);
+    }
+    payload
+}
+
 #[derive(Args)]
 struct WaitArgs {
     cap: String,
@@ -1274,11 +1285,11 @@ impl CapsArgs {
                         .mutate_json_confirmed(
                             Method::POST,
                             &format!("/organizations/{organization}/imports/loom"),
-                            &json!({
-                                "loomUrl": args.loom_url,
-                                "ownerEmail": args.owner_email,
-                                "spaceName": args.space,
-                            }),
+                            &loom_import_payload(
+                                &args.loom_url,
+                                args.owner_email.as_deref(),
+                                args.space.as_deref(),
+                            ),
                         )
                         .await?;
                     let value = if args.wait {
@@ -1763,6 +1774,26 @@ mod tests {
     use super::*;
     use tokio::io::{AsyncReadExt, AsyncWriteExt};
 
+    #[test]
+    fn loom_import_payload_omits_unset_optional_fields() {
+        assert_eq!(
+            loom_import_payload("https://www.loom.com/share/abc", None, None),
+            json!({ "loomUrl": "https://www.loom.com/share/abc" })
+        );
+        assert_eq!(
+            loom_import_payload(
+                "https://www.loom.com/share/abc",
+                Some("owner@example.com"),
+                Some("Team"),
+            ),
+            json!({
+                "loomUrl": "https://www.loom.com/share/abc",
+                "ownerEmail": "owner@example.com",
+                "spaceName": "Team",
+            })
+        );
+    }
+
     async fn read_request(stream: &mut tokio::net::TcpStream) -> String {
         let mut bytes = Vec::new();
         let mut buffer = [0_u8; 1_024];
diff --git a/apps/web/__tests__/unit/agent-api-contract.test.ts b/apps/web/__tests__/unit/agent-api-contract.test.ts
index 18078ced76b..c288cdb9d39 100644
--- a/apps/web/__tests__/unit/agent-api-contract.test.ts
+++ b/apps/web/__tests__/unit/agent-api-contract.test.ts
@@ -16,6 +16,26 @@ const status = {
 };
 
 describe("agent API contract", () => {
+	it("accepts omitted and null Loom import options from installed clients", () => {
+		const loomUrl = "https://www.loom.com/share/synthetic";
+		const decode = Schema.decodeUnknownSync(Agent.AgentLoomImportInput);
+
+		expect(decode({ loomUrl })).toEqual({ loomUrl });
+		expect(decode({ loomUrl, ownerEmail: null, spaceName: null })).toEqual({
+			loomUrl,
+			ownerEmail: null,
+			spaceName: null,
+		});
+		expect(
+			decode({
+				loomUrl,
+				ownerEmail: "owner@example.com",
+				spaceName: "Team",
+			}),
+		).toEqual({ loomUrl, ownerEmail: "owner@example.com", spaceName: "Team" });
+		expect(() => decode({ loomUrl, ownerEmail: 42 })).toThrow();
+	});
+
 	it("verifies credentials online and rate limits authorization boundaries", () => {
 		const contract = readFileSync(
 			join(process.cwd(), "../../packages/web-domain/src/Agent.ts"),
diff --git a/packages/web-domain/src/Agent.ts b/packages/web-domain/src/Agent.ts
index 991f058a839..2ac134832e2 100644
--- a/packages/web-domain/src/Agent.ts
+++ b/packages/web-domain/src/Agent.ts
@@ -1132,8 +1132,8 @@ export const AgentUploadCompleteResponse = Schema.Struct({
 
 export const AgentLoomImportInput = Schema.Struct({
 	loomUrl: Schema.String,
-	ownerEmail: Schema.optional(Schema.String),
-	spaceName: Schema.optional(Schema.String),
+	ownerEmail: Schema.optional(Schema.NullOr(Schema.String)),
+	spaceName: Schema.optional(Schema.NullOr(Schema.String)),
 });
 
 export const AgentProfileUpdateInput = Schema.Struct({