diff --git a/README.md b/README.md
index e667e7b..af7e331 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ This command takes the following options:
 
 - `api-gateway-region`
   The API Gateway region. Defaults to `us-east-1`.
-  
+
 - `api-key`
   The API key if required by the method. Defaults to none.
 
@@ -92,6 +92,9 @@ This command takes the following options:
 - `body`
   The request body as a JSON string. Defaults to `'{}'`.
 
+- `anonymous`
+  Perform action anonymously, without IAM credentials.
+
 For additional documentation on the format for `params` and `additional-params`; refer to the generic [API Gateway Client][apiGClient] docs.
 
 ### Local Development
diff --git a/index.js b/index.js
index 3ce88ff..4c42468 100755
--- a/index.js
+++ b/index.js
@@ -65,6 +65,10 @@ var argv = require("yargs")
     describe: "API request additional params",
     default: "{}"
   })
+  .option("anonymous", {
+    describe: "Perform action without IAM credentials",
+    demandOption: false
+  })
   .option("body", {
     describe: "API request body",
     default: "{}"
@@ -195,6 +199,10 @@ function makeRequest(userTokens) {
     });
 }
 
-authenticate(function(tokens) {
-  getCredentials(tokens, makeRequest);
-});
+if (argv.anonymous) {
+  makeRequest(null)
+} else {
+  authenticate(function(tokens) {
+    getCredentials(tokens, makeRequest);
+  });
+}