diff --git a/cereal/custom.capnp b/cereal/custom.capnp
index 0226fff405..cc402ff546 100644
--- a/cereal/custom.capnp
+++ b/cereal/custom.capnp
@@ -496,11 +496,84 @@ struct CustomReserved15 @0xbd443b539493bc68 {
 struct CustomReserved16 @0xfc6241ed8877b611 {
 }
 
+enum MapdExtendedOutType {
+  paths @0;
+  settings @1;
+}
+
 struct MapdExtendedOut @0xa30662f84033036c {
+  type @0 :MapdExtendedOutType;
+  json @1 :Text;
+}
+
+enum MapdInputType {
+  download @0;
+  setTargetLateralAccel @1;
+  setSpeedLimitOffset @2;
+  setSpeedLimitControl @3;
+  setCurveSpeedControl @4;
+  setVisionCurveSpeedControl @5;
+  setLogLevel @6;
+  setVisionCurveTargetLatA @7;
+  setVisionCurveMinTargetV @8;
+  reloadSettings @9;
+  saveSettings @10;
+  setEnableSpeed @11;
+  setVisionCurveUseEnableSpeed @12;
+  setCurveUseEnableSpeed @13;
+  setSpeedLimitUseEnableSpeed @14;
+  setHoldLastSeenSpeedLimit @15;
+  setCurveTargetJerk @16;
+  setCurveTargetAccel @17;
+  setCurveTargetOffset @18;
+  setDefaultLaneWidth @19;
+  setCurveTargetLatA @20;
+  loadDefaultSettings @21;
+  loadRecommendedSettings @22;
+  setSlowDownForNextSpeedLimit @23;
+  setSpeedUpForNextSpeedLimit @24;
+  setHoldSpeedLimitWhileChangingSetSpeed @25;
+}
+
+enum SpeedLimitOffsetType {
+  static @0;
+  percent @1;
 }
 
 struct MapdIn @0xc86a3d38d13eb3ef {
+  type @0 :MapdInputType;
+  float @1 :Float32;
+  str @2 :Text;
+  bool @3 :Bool;
+}
+
+enum RoadContext {
+  freeway @0;
+  city @1;
+  unknown @2;
 }
 
 struct MapdOut @0xa4f1eb3323f5f582 {
+  wayName @0 :Text;
+  wayRef @1 :Text;
+  roadName @2 :Text;
+  speedLimit @3 :Float32;
+  nextSpeedLimit @4 :Float32;
+  nextSpeedLimitDistance @5 :Float32;
+  hazard @6 :Text;
+  nextHazard @7 :Text;
+  nextHazardDistance @8 :Float32;
+  advisorySpeed @9 :Float32;
+  nextAdvisorySpeed @10 :Float32;
+  nextAdvisorySpeedDistance @11 :Float32;
+  oneWay @12 :Bool;
+  lanes @13 :UInt8;
+  tileLoaded @14 :Bool;
+  speedLimitOffset @15 :Float32;
+  suggestedSpeed @16 :Float32;
+  estimatedRoadWidth @17 :Float32;
+  roadContext @18 :RoadContext;
+  distanceFromWayCenter @19 :Float32;
+  visionCurveSpeed @20 :Float32;
+  curveSpeed @21 :Float32;
 }