diff --git a/lib/modules/perf/HttpMetric.js b/lib/modules/perf/HttpMetric.js
new file mode 100644
index 00000000..cbeeab94
--- /dev/null
+++ b/lib/modules/perf/HttpMetric.js
@@ -0,0 +1,96 @@
+/**
+ * @flow
+ * Trace representation wrapper
+ */
+import { getNativeModule } from '../../utils/native';
+import type PerformanceMonitoring from './';
+
+export default class HttpMetric {
+  url: string;
+  httpMethod: string;
+  _perf: PerformanceMonitoring;
+
+  constructor(perf: PerformanceMonitoring, url: string, httpMethod: string) {
+    this._perf = perf;
+    this.url = url;
+    this.httpMethod = httpMethod;
+  }
+
+  getAttribute(attribute: string): Promise<string> {
+    return getNativeModule(this._perf).getHttpMetricAttribute(
+      this.url,
+      this.httpMethod,
+      attribute
+    );
+  }
+
+  getAttributes(): Promise<Object> {
+    return getNativeModule(this._perf).getHttpMetricAttributes(
+      this.url,
+      this.httpMethod
+    );
+  }
+
+  putAttribute(attribute: string, value: string): Promise<null> {
+    return getNativeModule(this._perf).putHttpMetricAttribute(
+      this.url,
+      this.httpMethod,
+      attribute,
+      value
+    );
+  }
+
+  removeAttribute(attribute: string): Promise<null> {
+    return getNativeModule(this._perf).removeHttpMetricAttribute(
+      this.url,
+      this.httpMethod,
+      attribute
+    );
+  }
+
+  setHttpResponseCode(code: number): Promise<null> {
+    return getNativeModule(this._perf).setHttpMetricResponseCode(
+      this.url,
+      this.httpMethod,
+      code
+    );
+  }
+
+  setRequestPayloadSize(bytes: number): Promise<null> {
+    return getNativeModule(this._perf).setHttpMetricRequestPayloadSize(
+      this.url,
+      this.httpMethod,
+      bytes
+    );
+  }
+
+  setResponseContentType(type: string): Promise<null> {
+    return getNativeModule(this._perf).setHttpMetricResponseContentType(
+      this.url,
+      this.httpMethod,
+      type
+    );
+  }
+
+  setResponsePayloadSize(bytes: number): Promise<null> {
+    return getNativeModule(this._perf).setHttpMetricResponsePayloadSize(
+      this.url,
+      this.httpMethod,
+      bytes
+    );
+  }
+
+  start(): Promise<null> {
+    return getNativeModule(this._perf).startHttpMetric(
+      this.url,
+      this.httpMethod
+    );
+  }
+
+  stop(): Promise<null> {
+    return getNativeModule(this._perf).stopHttpMetric(
+      this.url,
+      this.httpMethod
+    );
+  }
+}
diff --git a/lib/modules/perf/Trace.js b/lib/modules/perf/Trace.js
index 5fd54608..bf784c61 100644
--- a/lib/modules/perf/Trace.js
+++ b/lib/modules/perf/Trace.js
@@ -14,15 +14,60 @@ export default class Trace {
     this.identifier = identifier;
   }
 
-  start(): void {
-    getNativeModule(this._perf).start(this.identifier);
+  getAttribute(attribute: string): Promise<string> {
+    return getNativeModule(this._perf).getTraceAttribute(
+      this.identifier,
+      attribute
+    );
   }
 
-  stop(): void {
-    getNativeModule(this._perf).stop(this.identifier);
+  getAttributes(): Promise<Object> {
+    return getNativeModule(this._perf).getTraceAttributes(this.identifier);
   }
 
-  incrementCounter(event: string): void {
-    getNativeModule(this._perf).incrementCounter(this.identifier, event);
+  getMetric(metricName: string): Promise<number> {
+    return getNativeModule(this._perf).getTraceLongMetric(
+      this.identifier,
+      metricName
+    );
+  }
+
+  incrementMetric(metricName: string, incrementBy: number): Promise<null> {
+    return getNativeModule(this._perf).incrementTraceMetric(
+      this.identifier,
+      metricName,
+      incrementBy
+    );
+  }
+
+  putAttribute(attribute: string, value: string): Promise<null> {
+    return getNativeModule(this._perf).putTraceAttribute(
+      this.identifier,
+      attribute,
+      value
+    );
+  }
+
+  putMetric(metricName: string, value: number): Promise<null> {
+    return getNativeModule(this._perf).putTraceMetric(
+      this.identifier,
+      metricName,
+      value
+    );
+  }
+
+  removeAttribute(attribute: string): Promise<null> {
+    return getNativeModule(this._perf).removeTraceAttribute(
+      this.identifier,
+      attribute
+    );
+  }
+
+  start(): Promise<null> {
+    return getNativeModule(this._perf).startTrace(this.identifier);
+  }
+
+  stop(): Promise<null> {
+    return getNativeModule(this._perf).stopTrace(this.identifier);
   }
 }
diff --git a/lib/modules/perf/index.js b/lib/modules/perf/index.js
index c22ed35e..92282167 100644
--- a/lib/modules/perf/index.js
+++ b/lib/modules/perf/index.js
@@ -3,6 +3,7 @@
  * Performance monitoring representation wrapper
  */
 import Trace from './Trace';
+import HttpMetric from './HttpMetric';
 import ModuleBase from '../../utils/ModuleBase';
 import { getNativeModule } from '../../utils/native';
 
@@ -27,7 +28,13 @@ export default class PerformanceMonitoring extends ModuleBase {
    * @returns {*}
    */
   setPerformanceCollectionEnabled(enabled: boolean): void {
-    getNativeModule(this).setPerformanceCollectionEnabled(enabled);
+    if (typeof enabled !== 'boolean') {
+      throw new Error(
+        'firebase.perf().setPerformanceCollectionEnabled() requires a boolean value'
+      );
+    }
+
+    return getNativeModule(this).setPerformanceCollectionEnabled(enabled);
   }
 
   /**
@@ -35,8 +42,22 @@ export default class PerformanceMonitoring extends ModuleBase {
    * @param trace
    */
   newTrace(trace: string): Trace {
+    if (typeof trace !== 'string') {
+      throw new Error('firebase.perf().newTrace() requires a string value');
+    }
+
     return new Trace(this, trace);
   }
+
+  newHttpMetric(url: string, httpMethod: string) {
+    if (typeof url !== 'string' || typeof httpMethod !== 'string') {
+      throw new Error(
+        'firebase.perf().newHttpMetric() requires url and httpMethod string values'
+      );
+    }
+
+    return new HttpMetric(this, url, httpMethod);
+  }
 }
 
 export const statics = {};
diff --git a/lib/utils/index.js b/lib/utils/index.js
index 5680419e..6d51b6b9 100644
--- a/lib/utils/index.js
+++ b/lib/utils/index.js
@@ -196,6 +196,7 @@ export function noop(): void {}
  * @returns {*}
  */
 export function stripTrailingSlash(str: string): string {
+  if (!str || !isString(str)) return str;
   return str.endsWith('/') ? str.slice(0, -1) : str;
 }