End trip (SendUpdatedTrip)

POST https://rivian.com/api/gql/gateway/graphql

Clears the vehicle’s active trip, the way the app’s End Trip button does. The app uses the same mutation to push an edited multi-stop trip; the end-trip payload is the degenerate case: an empty plan whose route id is end_trip_<ms>.

Session headers only. No phone key or HMAC is involved, and requiresWakeup: true is fixed in the mutation, so Rivian wakes a sleeping vehicle itself.

Found by decompiling Android app 3.17.0 (the app pins certificates, so MITM capture does not work). Verified on an R1T, 2026-10.

Headers

a-sess: <app session token>
u-sess: <user session token>
csrf-token: <csrf token>

Request

{
  "operationName": "SendUpdatedTrip",
  "variables": {
    "vehicleId": "<your-vehicle-id>",
    "payload": "<base64 Parallax envelope, see below>"
  },
  "query": "mutation SendUpdatedTrip($vehicleId: String!, $payload: String!) { sendParallaxPayload(payload: $payload, meta: { vehicleId: $vehicleId model: \"c2v_navigation.trip_copilot.updated_trip\" isVehicleModelOp: false requiresWakeup: true } ) { success sequenceNumber } }"
}

Payload

Standard base64 (no line wrapping) of this protobuf, field numbers as the app’s generated classes declare them:

// Parallax c2v envelope
message Envelope {
  Value value = 10;                   // oneof; the app sets case 10 for trip_copilot
  google.protobuf.Timestamp lastUpdate = 12;
  bytes correlationId = 16;           // 16 random bytes (a UUID)
}
message Value { bytes bytesVal = 2; } // serialized UpdatedTrip

message UpdatedTrip {
  PlanIdentifierMetadata planIdentifierMetadata = 1;
  Preferences preferences = 2;        // present but empty for End Trip
  Publisher publisher = 3;
}
message PlanIdentifierMetadata {
  string abrpRouteId = 1;             // "end_trip_<epoch ms>" for End Trip
  repeated Leg legs = 2;              // empty for End Trip
}
message Leg { string abrpLegId = 1; string googleRouteRequest = 2; Waypoint destination = 3; }
message Waypoint { string name = 1; GeoCoordinate coordinate = 2; string placeId = 3; bool isChargeStop = 4; bool isSystemAdded = 5; }
message GeoCoordinate { double latitude = 1; double longitude = 2; }
message Preferences { float currentArrivalSoCPercentage = 1; float defaultArrivalSoCPercentage = 2; repeated string excludeOptions = 3; repeated string evChargeFilters = 4; }
message Publisher { string userId = 1; }  // currentUser.id

The app sets lastUpdate.seconds = ms / 1000 and lastUpdate.nanos = ms % 1000000000.

Example End Trip payload for user user-placeholder at 1760000000000 ms, decoded:

10: Value { 2: UpdatedTrip { 1: { 1: "end_trip_1760000000000" }, 2: {}, 3: { 1: "user-placeholder" } } }
12: Timestamp { 1: 1760000000, 2: 0 }
16: <16 bytes>

A stdlib-only encoder: home-assistant-rivian api_ext.py.

Response

{
  "data": {
    "sendParallaxPayload": {
      "success": true,
      "sequenceNumber": 0
    }
  }
}

The trip disappears from the vehicle display and the app within a few seconds.

Related

A destination sent with ParseAndShareLocationToVehicle while a trip is open is added as the first stop, not replaced. Send End Trip first to replace.