diff --git a/packages/opentelemetry-context-base/src/index.ts b/packages/opentelemetry-context-base/src/index.ts
index 6acf3afa4e0..f21192eb003 100644
--- a/packages/opentelemetry-context-base/src/index.ts
+++ b/packages/opentelemetry-context-base/src/index.ts
@@ -13,3 +13,5 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+export * from './types';
diff --git a/packages/opentelemetry-context-base/src/types.ts b/packages/opentelemetry-context-base/src/types.ts
new file mode 100644
index 00000000000..73ec54377a1
--- /dev/null
+++ b/packages/opentelemetry-context-base/src/types.ts
@@ -0,0 +1,51 @@
+/**
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Default type for functions */
+// tslint:disable:no-any
+export type Func<T> = (...args: any[]) => T;
+
+/** A key/value object for anything that can be stored in the context */
+export interface ContextStore {
+  [key: string]: unknown;
+}
+
+export interface ContextManager {
+  /**
+   * Binds the trace context to the given function.
+   * This is necessary in order to create child spans correctly in functions
+   * that are called asynchronously (for example, in a network response
+   * handler).
+   * @param fn A function to which to bind the trace context.
+   */
+  wrapFunction<T>(fn: Func<T>): Func<T>;
+
+  /**
+   * Binds the trace context to the given event emitter.
+   * This is necessary in order to create child spans correctly in event
+   * handlers.
+   * @param emitter An event emitter whose handlers should have
+   *     the trace context binded to them.
+   */
+  wrapEmitter(emitter: NodeJS.EventEmitter): void;
+
+  /**
+   * Get the current key/value storage from the current context.
+   * There are specific case where the context is not propagated by specific
+   * code (ex: user space queueing) so expect it to be null sometimes.
+   */
+  getCurrentContext(): ContextStore | null;
+}