diff --git a/src/rpc/registry/methods_reg.rs b/src/rpc/registry/methods_reg.rs
index 2d84a9c5aa72..bdabd0d7768c 100644
--- a/src/rpc/registry/methods_reg.rs
+++ b/src/rpc/registry/methods_reg.rs
@@ -109,9 +109,9 @@ macro_rules! register_actor_methods {
             $registry.register_method(
                 $code_cid,
                 $method as MethodNum,
-                |bytes| -> anyhow::Result<()> {
+                |bytes| -> anyhow::Result<serde_json::Value> {
                     if bytes.is_empty() {
-                        Ok(())
+                        Ok(serde_json::json!({}))
                     } else {
                         Ok(fvm_ipld_encoding::from_slice(bytes)?)
                     }
diff --git a/src/tool/subcommands/api_cmd/api_compare_tests.rs b/src/tool/subcommands/api_cmd/api_compare_tests.rs
index fba0e3f293f7..9d5b9f8607fb 100644
--- a/src/tool/subcommands/api_cmd/api_compare_tests.rs
+++ b/src/tool/subcommands/api_cmd/api_compare_tests.rs
@@ -1963,6 +1963,12 @@ fn state_decode_params_api_tests(tipset: &Tipset) -> anyhow::Result<Vec<RpcTest>
             to_vec(&reward_update_network_params)?,
             tipset.key().into(),
         ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::REWARD_ACTOR,
+            fil_actor_reward_state::v16::Method::ThisEpochReward as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
         RpcTest::identity(StateDecodeParams::request((
             Address::POWER_ACTOR,
             fil_actor_power_state::v16::Method::CreateMiner as u64,
@@ -2007,6 +2013,48 @@ fn state_decode_params_api_tests(tipset: &Tipset) -> anyhow::Result<Vec<RpcTest>
         //     to_vec(&power_miner_power_exp_params)?,
         //     tipset.key().into(),
         // ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::Constructor as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::OnEpochTickEnd as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::CurrentTotalPower as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::NetworkRawPowerExported as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::MinerCountExported as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::POWER_ACTOR,
+            fil_actor_power_state::v16::Method::MinerConsensusCountExported as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
+        RpcTest::identity(StateDecodeParams::request((
+            Address::SYSTEM_ACTOR,
+            fil_actor_system_state::v16::Method::Constructor as u64,
+            vec![],
+            tipset.key().into(),
+        ))?),
     ];
 
     Ok(tests)
diff --git a/src/tool/subcommands/api_cmd/test_snapshots.txt b/src/tool/subcommands/api_cmd/test_snapshots.txt
index 5146d8354577..8132fc8e4c0a 100644
--- a/src/tool/subcommands/api_cmd/test_snapshots.txt
+++ b/src/tool/subcommands/api_cmd/test_snapshots.txt
@@ -143,6 +143,14 @@ filecoin_statedecodeparams_1753985928338431.rpcsnap.json.zst
 filecoin_statedecodeparams_1753985928337192.rpcsnap.json.zst
 filecoin_statedecodeparams_1753985928337443.rpcsnap.json.zst
 filecoin_statedecodeparams_1753985928337618.rpcsnap.json.zst
+filecoin_power_minercount_statedecodeparams_1754479441718517.rpcsnap.json.zst
+filecoin_system_constructor_statedecodeparams_1754479441718641.rpcsnap.json.zst
+filecoin_power_constructor_statedecodeparams_1754479441718709.rpcsnap.json.zst
+filecoin_power_minerconsensuscount_statedecodeparams_1754479441718804.rpcsnap.json.zst
+filecoin_power_currenttotalpower_statedecodeparams_1754479441718859.rpcsnap.json.zst
+filecoin_power_onepochtickend_statedecodeparams_1754479441718920.rpcsnap.json.zst
+filecoin_reward_thisepochreward_statedecodeparams_1754479441718972.rpcsnap.json.zst
+filecoin_power_networkrawpower_statedecodeparams_1754479441719018.rpcsnap.json.zst
 filecoin_statereplay_1743504051038215.rpcsnap.json.zst
 filecoin_statesearchmsg_1741784596636715.rpcsnap.json.zst
 filecoin_statesearchmsglimited_1741784596704876.rpcsnap.json.zst