diff --git a/api/api_gateway.go b/api/api_gateway.go
index 187fad86f..08b3e0681 100644
--- a/api/api_gateway.go
+++ b/api/api_gateway.go
@@ -43,4 +43,5 @@ type Gateway interface {
 	StateVerifiedClientStatus(ctx context.Context, addr address.Address, tsk types.TipSetKey) (*abi.StoragePower, error)
 	StateSearchMsg(ctx context.Context, from types.TipSetKey, msg cid.Cid, limit abi.ChainEpoch, allowReplaced bool) (*MsgLookup, error)
 	StateWaitMsg(ctx context.Context, cid cid.Cid, confidence uint64, limit abi.ChainEpoch, allowReplaced bool) (*MsgLookup, error)
+	WalletBalance(context.Context, address.Address) (types.BigInt, error)
 }
diff --git a/api/proxy_gen.go b/api/proxy_gen.go
index 402da34c0..bfaaade94 100644
--- a/api/proxy_gen.go
+++ b/api/proxy_gen.go
@@ -516,6 +516,8 @@ type GatewayStruct struct {
 		StateVerifiedClientStatus func(p0 context.Context, p1 address.Address, p2 types.TipSetKey) (*abi.StoragePower, error) ``
 
 		StateWaitMsg func(p0 context.Context, p1 cid.Cid, p2 uint64, p3 abi.ChainEpoch, p4 bool) (*MsgLookup, error) ``
+
+		WalletBalance func(p0 context.Context, p1 address.Address) (types.BigInt, error) ``
 	}
 }
 
@@ -2601,6 +2603,14 @@ func (s *GatewayStub) StateWaitMsg(p0 context.Context, p1 cid.Cid, p2 uint64, p3
 	return nil, xerrors.New("method not supported")
 }
 
+func (s *GatewayStruct) WalletBalance(p0 context.Context, p1 address.Address) (types.BigInt, error) {
+	return s.Internal.WalletBalance(p0, p1)
+}
+
+func (s *GatewayStub) WalletBalance(p0 context.Context, p1 address.Address) (types.BigInt, error) {
+	return *new(types.BigInt), xerrors.New("method not supported")
+}
+
 func (s *SignableStruct) Sign(p0 context.Context, p1 SignFunc) error {
 	return s.Internal.Sign(p0, p1)
 }
diff --git a/build/openrpc/full.json.gz b/build/openrpc/full.json.gz
index 0e258fe64..83e319db5 100644
Binary files a/build/openrpc/full.json.gz and b/build/openrpc/full.json.gz differ
diff --git a/build/openrpc/miner.json.gz b/build/openrpc/miner.json.gz
index 00fbcf797..3797357ba 100644
Binary files a/build/openrpc/miner.json.gz and b/build/openrpc/miner.json.gz differ
diff --git a/build/openrpc/worker.json.gz b/build/openrpc/worker.json.gz
index eaae7109d..33b8c5ebe 100644
Binary files a/build/openrpc/worker.json.gz and b/build/openrpc/worker.json.gz differ
diff --git a/cmd/lotus-gateway/api.go b/cmd/lotus-gateway/api.go
index b1ddd369e..003625a84 100644
--- a/cmd/lotus-gateway/api.go
+++ b/cmd/lotus-gateway/api.go
@@ -71,6 +71,7 @@ type gatewayDepsAPI interface {
 	StateSectorGetInfo(ctx context.Context, maddr address.Address, n abi.SectorNumber, tsk types.TipSetKey) (*miner.SectorOnChainInfo, error)
 	StateVerifiedClientStatus(ctx context.Context, addr address.Address, tsk types.TipSetKey) (*abi.StoragePower, error)
 	StateVMCirculatingSupplyInternal(context.Context, types.TipSetKey) (api.CirculatingSupply, error)
+	WalletBalance(context.Context, address.Address) (types.BigInt, error) //perm:read
 }
 
 var _ gatewayDepsAPI = *new(api.FullNode) // gateway depends on latest
@@ -414,6 +415,10 @@ func (a *GatewayAPI) WalletVerify(ctx context.Context, k address.Address, msg []
 	return sigs.Verify(sig, k, msg) == nil, nil
 }
 
+func (a *GatewayAPI) WalletBalance(ctx context.Context, k address.Address) (types.BigInt, error) {
+	return a.api.WalletBalance(ctx, k)
+}
+
 var _ api.Gateway = (*GatewayAPI)(nil)
 var _ full.ChainModuleAPI = (*GatewayAPI)(nil)
 var _ full.GasModuleAPI = (*GatewayAPI)(nil)