diff --git a/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/aws-sdk/call-aws-service.ts b/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/aws-sdk/call-aws-service.ts
index 556c0becdac08..16d37f7fb1aec 100644
--- a/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/aws-sdk/call-aws-service.ts
+++ b/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/aws-sdk/call-aws-service.ts
@@ -79,6 +79,15 @@ export class CallAwsService extends sfn.TaskStateBase {
     if (this.props.integrationPattern === sfn.IntegrationPattern.RUN_JOB) {
       throw new Error('The RUN_JOB integration pattern is not supported for CallAwsService');
     }
+    if (!Token.isUnresolved(this.props.action) && !this.props.action.startsWith(this.props.action[0]?.toLowerCase())) {
+      throw new Error(`action must be camelCase, got: ${this.props.action}`);
+    }
+    if (this.props.parameters) {
+      const invalidKeys = Object.keys(this.props.parameters).filter(key => !key.startsWith(key[0]?.toUpperCase()));
+      if (invalidKeys.length) {
+        throw new Error(`parameter names must be PascalCase, got: ${invalidKeys.join(', ')}`);
+      }
+    }
 
     const iamServiceMap: Record<string, string> = {
       sfn: 'states',
diff --git a/packages/aws-cdk-lib/aws-stepfunctions-tasks/test/aws-sdk/call-aws-service.test.ts b/packages/aws-cdk-lib/aws-stepfunctions-tasks/test/aws-sdk/call-aws-service.test.ts
index cd5ac68818c15..3eceee2639073 100644
--- a/packages/aws-cdk-lib/aws-stepfunctions-tasks/test/aws-sdk/call-aws-service.test.ts
+++ b/packages/aws-cdk-lib/aws-stepfunctions-tasks/test/aws-sdk/call-aws-service.test.ts
@@ -161,6 +161,30 @@ test('throws with invalid integration pattern', () => {
   })).toThrow(/The RUN_JOB integration pattern is not supported for CallAwsService/);
 });
 
+test('throws if action is not camelCase', () => {
+  expect(() => new tasks.CallAwsService(stack, 'GetObject', {
+    service: 's3',
+    action: 'GetObject',
+    parameters: {
+      Bucket: 'my-bucket',
+      Key: sfn.JsonPath.stringAt('$.key'),
+    },
+    iamResources: ['*'],
+  })).toThrow(/action must be camelCase, got: GetObject/);
+});
+
+test('throws if parameters has keys as not PascalCase', () => {
+  expect(() => new tasks.CallAwsService(stack, 'GetObject', {
+    service: 's3',
+    action: 'getObject',
+    parameters: {
+      bucket: 'my-bucket',
+      key: sfn.JsonPath.stringAt('$.key'),
+    },
+    iamResources: ['*'],
+  })).toThrow(/parameter names must be PascalCase, got: bucket, key/);
+});
+
 test('can pass additional IAM statements', () => {
   // WHEN
   const task = new tasks.CallAwsService(stack, 'DetectLabels', {