diff --git a/CHANGELOG.md b/CHANGELOG.md
index 198fb09681..11bb401f11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+ - Expose a debugging action to learn about loaded modules.
+ - Allow retrieval of `package.json` files.
+
 ## 1.41.0
  - Add PostgreSQL instrumentation ([pg](https://www.npmjs.com/package/pg)).
 
diff --git a/src/actions/getModuleAnalysis.js b/src/actions/getModuleAnalysis.js
new file mode 100644
index 0000000000..74668483c6
--- /dev/null
+++ b/src/actions/getModuleAnalysis.js
@@ -0,0 +1,12 @@
+'use strict';
+
+exports.getModuleAnalysis = function(request, multiCb) {
+  multiCb({
+    data: {
+      'cwd': process.cwd(),
+      'require.main.filename': require.main ? require.main.filename : undefined,
+      'require.main.paths': require.main ? require.main.paths : undefined,
+      'require.cache': Object.keys(require.cache)
+    }
+  });
+};
diff --git a/src/actions/source.js b/src/actions/source.js
index d37277caac..4a7b6eb3de 100644
--- a/src/actions/source.js
+++ b/src/actions/source.js
@@ -4,7 +4,7 @@ var fs = require('fs');
 
 var logger = require('../logger').getLogger('actions/profiling/cpu');
 
-var validFileRequests = /\.(js|ts|jsx)$/i;
+var validFileRequests = /\.(js|ts|jsx)$|(^|\/)package\.json$/i;
 
 exports.getSourceFile = function(request, multiCb) {
   if (!request.args.file.match(validFileRequests)) {
@@ -21,7 +21,7 @@ exports.getSourceFile = function(request, multiCb) {
 function readFile(request, multiCb) {
   fs.readFile(request.args.file, {encoding: 'utf8'}, function(error, content) {
     if (error) {
-      logger.warn(
+      logger.debug(
         'Failed to retrieve source file for user request: %s.',
         request.args.file,
         {error: error}
diff --git a/src/agent/requestHandler.js b/src/agent/requestHandler.js
index 7f64e4da34..9669db4958 100644
--- a/src/agent/requestHandler.js
+++ b/src/agent/requestHandler.js
@@ -6,7 +6,8 @@ var logger = require('../logger').getLogger('agent/requestHandler');
 var agentConnection = require('../agentConnection');
 
 var actionMapping = {
-  'node.source': require('../actions/source').getSourceFile
+  'node.source': require('../actions/source').getSourceFile,
+  'node.getModuleAnalysis': require('../actions/getModuleAnalysis').getModuleAnalysis
 };
 
 if (semver.satisfies(process.versions.node, '>=4.0.0')) {
diff --git a/test/actions/getModuleAnalysis_test.js b/test/actions/getModuleAnalysis_test.js
new file mode 100644
index 0000000000..8bd9177c4b
--- /dev/null
+++ b/test/actions/getModuleAnalysis_test.js
@@ -0,0 +1,55 @@
+'use strict';
+
+var expect = require('chai').expect;
+var semver = require('semver');
+
+var supportedVersion = require('../../src/tracing/index').supportedVersion;
+var config = require('../config');
+var utils = require('../utils');
+
+describe('actions/getModuleAnalysis', function() {
+  if (semver.satisfies(process.versions.node, '<4')) {
+    return;
+  }
+
+  // controls require features that aren't available in early Node.js versions
+  var expressControls = require('../apps/expressControls');
+  var agentStubControls = require('../apps/agentStubControls');
+
+  this.timeout(config.getTestTimeout());
+
+  agentStubControls.registerTestHooks();
+  expressControls.registerTestHooks({
+    enableTracing: supportedVersion(process.versions.node)
+  });
+
+  beforeEach(function() {
+    return agentStubControls.waitUntilAppIsCompletelyInitialized(expressControls.getPid());
+  });
+
+  it('must receive module analysis', function() {
+    var messageId = 'a';
+    return agentStubControls.addRequestForPid(
+      expressControls.getPid(),
+      {
+        action: 'node.getModuleAnalysis',
+        messageId: messageId,
+        args: {}
+      }
+    )
+    .then(function() {
+      return utils.retry(function() {
+        return agentStubControls.getResponses()
+        .then(function(responses) {
+          utils.expectOneMatching(responses, function(response) {
+            expect(response.messageId).to.equal(messageId);
+            expect(response.data.data.cwd).to.be.a('string');
+            expect(response.data.data['require.main.filename']).to.be.a('string');
+            expect(response.data.data['require.main.paths']).to.be.an('array');
+            expect(response.data.data['require.cache']).to.be.an('array');
+          });
+        });
+      });
+    });
+  });
+});
diff --git a/test/actions/source_test.js b/test/actions/source_test.js
index e872fcf5f0..3cb0ce808c 100644
--- a/test/actions/source_test.js
+++ b/test/actions/source_test.js
@@ -15,7 +15,7 @@ describe('actions/source', function() {
   }
 
   // controls require features that aren't available in early Node.js versions
-  var expressControls = require('../apps/expressElasticsearchControls');
+  var expressControls = require('../apps/expressControls');
   var agentStubControls = require('../apps/agentStubControls');
 
   this.timeout(config.getTestTimeout());
@@ -55,7 +55,7 @@ describe('actions/source', function() {
     });
   });
 
-  it('must not allow JSON requests', function() {
+  it('must allow package.json requests', function() {
     var messageId = 'a';
     return agentStubControls.addRequestForPid(
       expressControls.getPid(),
@@ -67,6 +67,32 @@ describe('actions/source', function() {
         }
       }
     )
+    .then(function() {
+      return utils.retry(function() {
+        return agentStubControls.getResponses()
+        .then(function(responses) {
+          utils.expectOneMatching(responses, function(response) {
+            expect(response.messageId).to.equal(messageId);
+            expect(response.data.data).to.be.a('string');
+            expect(response.data.data).to.match(/"name": "instana-nodejs-sensor"/i);
+          });
+        });
+      });
+    });
+  });
+
+  it('must not allow JSON requests', function() {
+    var messageId = 'a';
+    return agentStubControls.addRequestForPid(
+      expressControls.getPid(),
+      {
+        action: 'node.source',
+        messageId: messageId,
+        args: {
+          file: path.join(process.cwd(), 'foo.json')
+        }
+      }
+    )
     .then(function() {
       return utils.retry(function() {
         return agentStubControls.getResponses()