diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe8b696d5f..0f8aeb8d50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -146,6 +146,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/staking) [#14590](https://github.com/cosmos/cosmos-sdk/pull/14590) Return undelegate amount in MsgUndelegateResponse
 * (tools) [#14793](https://github.com/cosmos/cosmos-sdk/pull/14793) Dockerfile optimization.
 * (cli) [#14953](https://github.com/cosmos/cosmos-sdk/pull/14953) Enable profiling block replay during abci handshake with `--cpu-profile`.
+* (baseapp) [#15023](https://github.com/cosmos/cosmos-sdk/pull/15023) Add `MessageRouter` interface to baseapp and pass it to authz instead of concrete type. 
 
 ### State Machine Breaking
 
diff --git a/baseapp/msg_service_router.go b/baseapp/msg_service_router.go
index 360bd89105..38c6990e4e 100644
--- a/baseapp/msg_service_router.go
+++ b/baseapp/msg_service_router.go
@@ -13,6 +13,13 @@ import (
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
+// MessageRouter ADR 031 request type routing
+// https://github.com/cosmos/cosmos-sdk/blob/main/docs/architecture/adr-031-msg-service.md
+type MessageRouter interface {
+	Handler(msg sdk.Msg) MsgServiceHandler
+	HandlerByTypeURL(typeURL string) MsgServiceHandler
+}
+
 // MsgServiceRouter routes fully-qualified Msg service methods to their handler.
 type MsgServiceRouter struct {
 	interfaceRegistry codectypes.InterfaceRegistry
diff --git a/x/authz/keeper/keeper.go b/x/authz/keeper/keeper.go
index 8b698d5536..295d4dbd38 100644
--- a/x/authz/keeper/keeper.go
+++ b/x/authz/keeper/keeper.go
@@ -27,12 +27,12 @@ const gasCostPerIteration = uint64(20)
 type Keeper struct {
 	storeKey   storetypes.StoreKey
 	cdc        codec.BinaryCodec
-	router     *baseapp.MsgServiceRouter
+	router     baseapp.MessageRouter
 	authKeeper authz.AccountKeeper
 }
 
 // NewKeeper constructs a message authorization Keeper
-func NewKeeper(storeKey storetypes.StoreKey, cdc codec.BinaryCodec, router *baseapp.MsgServiceRouter, ak authz.AccountKeeper) Keeper {
+func NewKeeper(storeKey storetypes.StoreKey, cdc codec.BinaryCodec, router baseapp.MessageRouter, ak authz.AccountKeeper) Keeper {
 	return Keeper{
 		storeKey:   storeKey,
 		cdc:        cdc,
diff --git a/x/authz/module/module.go b/x/authz/module/module.go
index 51955bef7c..89178ae7d2 100644
--- a/x/authz/module/module.go
+++ b/x/authz/module/module.go
@@ -181,7 +181,7 @@ type AuthzInputs struct {
 	AccountKeeper    authz.AccountKeeper
 	BankKeeper       authz.BankKeeper
 	Registry         cdctypes.InterfaceRegistry
-	MsgServiceRouter *baseapp.MsgServiceRouter
+	MsgServiceRouter baseapp.MessageRouter
 }
 
 //nolint:revive
diff --git a/x/gov/keeper/keeper.go b/x/gov/keeper/keeper.go
index 2cd2c602b2..d717bce145 100644
--- a/x/gov/keeper/keeper.go
+++ b/x/gov/keeper/keeper.go
@@ -37,7 +37,7 @@ type Keeper struct {
 	legacyRouter v1beta1.Router
 
 	// Msg server router
-	router *baseapp.MsgServiceRouter
+	router baseapp.MessageRouter
 
 	config types.Config
 
@@ -126,7 +126,7 @@ func (k Keeper) Logger(ctx sdk.Context) log.Logger {
 }
 
 // Router returns the gov keeper's router
-func (k Keeper) Router() *baseapp.MsgServiceRouter {
+func (k Keeper) Router() baseapp.MessageRouter {
 	return k.router
 }
 
diff --git a/x/group/keeper/keeper.go b/x/group/keeper/keeper.go
index 8b42b0e062..702cfbc0f9 100644
--- a/x/group/keeper/keeper.go
+++ b/x/group/keeper/keeper.go
@@ -76,13 +76,13 @@ type Keeper struct {
 	voteByProposalIndex orm.Index
 	voteByVoterIndex    orm.Index
 
-	router *baseapp.MsgServiceRouter
+	router baseapp.MessageRouter
 
 	config group.Config
 }
 
 // NewKeeper creates a new group keeper.
-func NewKeeper(storeKey storetypes.StoreKey, cdc codec.Codec, router *baseapp.MsgServiceRouter, accKeeper group.AccountKeeper, config group.Config) Keeper {
+func NewKeeper(storeKey storetypes.StoreKey, cdc codec.Codec, router baseapp.MessageRouter, accKeeper group.AccountKeeper, config group.Config) Keeper {
 	k := Keeper{
 		key:       storeKey,
 		router:    router,
diff --git a/x/group/keeper/proposal_executor.go b/x/group/keeper/proposal_executor.go
index 4ae0b30517..ca09065e1b 100644
--- a/x/group/keeper/proposal_executor.go
+++ b/x/group/keeper/proposal_executor.go
@@ -12,7 +12,7 @@ import (
 
 // doExecuteMsgs routes the messages to the registered handlers. Messages are limited to those that require no authZ or
 // by the account of group policy only. Otherwise this gives access to other peoples accounts as the sdk middlewares are bypassed
-func (s Keeper) doExecuteMsgs(ctx sdk.Context, router *baseapp.MsgServiceRouter, proposal group.Proposal, groupPolicyAcc sdk.AccAddress, decisionPolicy group.DecisionPolicy) ([]sdk.Result, error) {
+func (s Keeper) doExecuteMsgs(ctx sdk.Context, router baseapp.MessageRouter, proposal group.Proposal, groupPolicyAcc sdk.AccAddress, decisionPolicy group.DecisionPolicy) ([]sdk.Result, error) {
 	// Ensure it's not too early to execute the messages.
 	minExecutionDate := proposal.SubmitTime.Add(decisionPolicy.GetMinExecutionPeriod())
 	if ctx.BlockTime().Before(minExecutionDate) {