diff --git a/src/actions/getMaxTimeVariation.ts b/src/actions/getMaxTimeVariation.ts
new file mode 100644
index 00000000..b0bfe82c
--- /dev/null
+++ b/src/actions/getMaxTimeVariation.ts
@@ -0,0 +1,33 @@
+import { Chain, PublicClient, Transport } from 'viem';
+import { sequencerInboxABI } from '../contracts/SequencerInbox';
+import { ActionParameters } from '../types/Actions';
+
+export type GetMaxTimeVariationParameters<Curried extends boolean = false> = ActionParameters<
+  {},
+  'sequencerInbox',
+  Curried
+>;
+
+export type GetMaxTimeVariationReturnType = {
+  delayBlocks: bigint;
+  futureBlocks: bigint;
+  delaySeconds: bigint;
+  futureSeconds: bigint;
+};
+
+export async function getMaxTimeVariation<TChain extends Chain | undefined>(
+  client: PublicClient<Transport, TChain>,
+  args: GetMaxTimeVariationParameters,
+): Promise<GetMaxTimeVariationReturnType> {
+  const [delayBlocks, futureBlocks, delaySeconds, futureSeconds] = await client.readContract({
+    abi: sequencerInboxABI,
+    functionName: 'maxTimeVariation',
+    address: args.sequencerInbox,
+  });
+  return {
+    delayBlocks,
+    futureBlocks,
+    delaySeconds,
+    futureSeconds,
+  };
+}
diff --git a/src/actions/index.ts b/src/actions/index.ts
new file mode 100644
index 00000000..63164981
--- /dev/null
+++ b/src/actions/index.ts
@@ -0,0 +1,3 @@
+export * from './getMaxTimeVariation';
+export * from './isBatchPoster';
+export * from './isValidKeysetHash';
diff --git a/src/actions/isBatchPoster.ts b/src/actions/isBatchPoster.ts
new file mode 100644
index 00000000..f71b773f
--- /dev/null
+++ b/src/actions/isBatchPoster.ts
@@ -0,0 +1,29 @@
+import { Address, Chain, PublicClient, ReadContractReturnType, Transport } from 'viem';
+import { sequencerInboxABI } from '../contracts/SequencerInbox';
+import { ActionParameters } from '../types/Actions';
+
+type Args = {
+  batchPoster: Address;
+};
+export type IsBatchPosterParameters<Curried extends boolean = false> = ActionParameters<
+  Args,
+  'sequencerInbox',
+  Curried
+>;
+
+export type IsBatchPosterReturnType = ReadContractReturnType<
+  typeof sequencerInboxABI,
+  'isBatchPoster'
+>;
+
+export async function isBatchPoster<TChain extends Chain | undefined>(
+  client: PublicClient<Transport, TChain>,
+  args: IsBatchPosterParameters,
+): Promise<IsBatchPosterReturnType> {
+  return client.readContract({
+    abi: sequencerInboxABI,
+    functionName: 'isBatchPoster',
+    address: args.sequencerInbox,
+    args: [args.batchPoster],
+  });
+}
diff --git a/src/actions/isValidKeysetHash.ts b/src/actions/isValidKeysetHash.ts
new file mode 100644
index 00000000..1a5e7007
--- /dev/null
+++ b/src/actions/isValidKeysetHash.ts
@@ -0,0 +1,30 @@
+import { Chain, Hex, PublicClient, ReadContractReturnType, Transport } from 'viem';
+import { sequencerInboxABI } from '../contracts/SequencerInbox';
+import { ActionParameters } from '../types/Actions';
+
+type Args = {
+  keysetHash: Hex;
+};
+
+export type IsValidKeysetHashParameters<Curried extends boolean = false> = ActionParameters<
+  Args,
+  'sequencerInbox',
+  Curried
+>;
+
+export type IsValidKeysetHashReturnType = ReadContractReturnType<
+  typeof sequencerInboxABI,
+  'isValidKeysetHash'
+>;
+
+export async function isValidKeysetHash<TChain extends Chain | undefined>(
+  client: PublicClient<Transport, TChain>,
+  args: IsValidKeysetHashParameters,
+): Promise<IsValidKeysetHashReturnType> {
+  return client.readContract({
+    abi: sequencerInboxABI,
+    functionName: 'isValidKeysetHash',
+    address: args.sequencerInbox,
+    args: [args.keysetHash],
+  });
+}
diff --git a/src/index.ts b/src/index.ts
index 3f143780..db767cbe 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -137,6 +137,7 @@ import {
   getConsensusReleaseByWasmModuleRoot,
   GetConsensusReleaseByWasmModuleRoot,
 } from './wasmModuleRoot';
+export * from './actions';
 
 export {
   arbOwnerPublicActions,
diff --git a/src/types/Actions.ts b/src/types/Actions.ts
new file mode 100644
index 00000000..0327ffba
--- /dev/null
+++ b/src/types/Actions.ts
@@ -0,0 +1,22 @@
+import { Address } from 'viem';
+import { Prettify } from './utils';
+
+/**
+ * Actions require contract address, but as part of decorators, the address might have been passed already to the decorator.
+ *
+ * If the address was passed to the decorator, it's now optional (we still allow overrides of the address per action).
+ * If the action doesn't have any other parameters beside the contract address, then parameters can either be { contract: address } or void
+ */
+export type ActionParameters<Args, ContractName extends string, Curried extends boolean> = Prettify<
+  Curried extends false
+    ? Args & { [key in ContractName]: Address }
+    : Args extends Record<string, never>
+    ?
+        | {
+            [key in ContractName]: Address;
+          }
+        | void
+    : Args & {
+        [key in ContractName]?: Address;
+      }
+>;