diff --git a/CHANGELOG.md b/CHANGELOG.md
index 999e1308415..d82ba35e11c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,6 @@
 
 ### vNEXT
 
-- FIXME(@abernix): Allow context to be passed to all GraphQLExtension methods.
 - Allow an optional function to resolve the `rootValue`, passing the `DocumentNode` AST to determine the value. [PR #1555](https://github.com/apollographql/apollo-server/pull/1555)
 - Follow-up on the work in [PR #1516](https://github.com/apollographql/apollo-server/pull/1516) to also fix missing insertion cursor/caret when a custom GraphQL configuration is specified which doesn't specify its own `cursorShape` property. [PR #1607](https://github.com/apollographql/apollo-server/pull/1607)
 
diff --git a/packages/apollo-engine-reporting/src/extension.ts b/packages/apollo-engine-reporting/src/extension.ts
index a986de83246..7f870ad1a6d 100644
--- a/packages/apollo-engine-reporting/src/extension.ts
+++ b/packages/apollo-engine-reporting/src/extension.ts
@@ -68,7 +68,7 @@ export class EngineReportingExtension<TContext = any>
     request: Request;
     queryString?: string;
     parsedQuery?: DocumentNode;
-    variables: Record<string, any>;
+    variables?: Record<string, any>;
     persistedQueryHit?: boolean;
     persistedQueryRegister?: boolean;
     context: any;
@@ -153,7 +153,7 @@ export class EngineReportingExtension<TContext = any>
         } else {
           try {
             this.trace.details!.variablesJson![name] = JSON.stringify(
-              o.variables[name],
+              o.variables![name],
             );
           } catch (e) {
             // This probably means that the value contains a circular reference,
diff --git a/packages/apollo-server-core/src/__tests__/runQuery.test.ts b/packages/apollo-server-core/src/__tests__/runQuery.test.ts
index 43064cb4c1a..2a3d25fdb30 100644
--- a/packages/apollo-server-core/src/__tests__/runQuery.test.ts
+++ b/packages/apollo-server-core/src/__tests__/runQuery.test.ts
@@ -435,6 +435,28 @@ describe('runQuery', () => {
         });
       });
     });
+
+    it('runs willSendResponse with extensions context', async () => {
+      class CustomExtension implements GraphQLExtension<any> {
+        willSendResponse(o: any) {
+          expect(o).toHaveProperty('context.baz', 'always here');
+          return o;
+        }
+      }
+
+      const queryString = `{ testString }`;
+      const expected = { testString: 'it works' };
+      const extensions = [() => new CustomExtension()];
+      return runQuery({
+        schema,
+        queryString,
+        context: { baz: 'always here' },
+        extensions,
+        request: new MockReq(),
+      }).then(res => {
+        expect(res.data).toEqual(expected);
+      });
+    });
   });
 
   describe('async_hooks', () => {
diff --git a/packages/apollo-server-core/src/formatters.ts b/packages/apollo-server-core/src/formatters.ts
index c509d07f0c9..2410f74aee2 100644
--- a/packages/apollo-server-core/src/formatters.ts
+++ b/packages/apollo-server-core/src/formatters.ts
@@ -1,7 +1,7 @@
 import { GraphQLExtension, GraphQLResponse } from 'graphql-extensions';
 import { formatApolloErrors } from 'apollo-server-errors';
 
-export class FormatErrorExtension extends GraphQLExtension {
+export class FormatErrorExtension<TContext = any> extends GraphQLExtension {
   private formatError?: Function;
   private debug: boolean;
 
@@ -13,9 +13,11 @@ export class FormatErrorExtension extends GraphQLExtension {
 
   public willSendResponse(o: {
     graphqlResponse: GraphQLResponse;
-  }): void | { graphqlResponse: GraphQLResponse } {
+    context: TContext;
+  }): void | { graphqlResponse: GraphQLResponse; context: TContext } {
     if (o.graphqlResponse.errors) {
       return {
+        ...o,
         graphqlResponse: {
           ...o.graphqlResponse,
           errors: formatApolloErrors(o.graphqlResponse.errors, {
diff --git a/packages/apollo-server-integration-testsuite/src/ApolloServer.ts b/packages/apollo-server-integration-testsuite/src/ApolloServer.ts
index d35f37eac7b..380c130f97c 100644
--- a/packages/apollo-server-integration-testsuite/src/ApolloServer.ts
+++ b/packages/apollo-server-integration-testsuite/src/ApolloServer.ts
@@ -547,8 +547,11 @@ export function testApolloServer<AS extends ApolloServerBase>(
             }
           });
 
-          class Extension extends GraphQLExtension {
-            willSendResponse(o: { graphqlResponse: GraphQLResponse }) {
+          class Extension<TContext = any> extends GraphQLExtension {
+            willSendResponse(o: {
+              graphqlResponse: GraphQLResponse;
+              context: TContext;
+            }) {
               expect(o.graphqlResponse.errors.length).toEqual(1);
               // formatError should be called after extensions
               expect(formatError).not.toBeCalled();
@@ -636,8 +639,11 @@ export function testApolloServer<AS extends ApolloServerBase>(
           return error;
         });
 
-        class Extension extends GraphQLExtension {
-          willSendResponse(_o: { graphqlResponse: GraphQLResponse }) {
+        class Extension<TContext = any> extends GraphQLExtension {
+          willSendResponse(_o: {
+            graphqlResponse: GraphQLResponse;
+            context: TContext;
+          }) {
             // formatError should be called after extensions
             expect(formatError).not.toBeCalled();
             extension();
diff --git a/packages/graphql-extensions/src/index.ts b/packages/graphql-extensions/src/index.ts
index aae80b7a1a9..7a706c599b3 100644
--- a/packages/graphql-extensions/src/index.ts
+++ b/packages/graphql-extensions/src/index.ts
@@ -33,6 +33,7 @@ export class GraphQLExtension<TContext = any> {
     variables?: { [key: string]: any };
     persistedQueryHit?: boolean;
     persistedQueryRegister?: boolean;
+    context: TContext;
   }): EndHandler | void;
   public parsingDidStart?(o: { queryString: string }): EndHandler | void;
   public validationDidStart?(): EndHandler | void;
@@ -42,7 +43,8 @@ export class GraphQLExtension<TContext = any> {
 
   public willSendResponse?(o: {
     graphqlResponse: GraphQLResponse;
-  }): void | { graphqlResponse: GraphQLResponse };
+    context: TContext;
+  }): void | { graphqlResponse: GraphQLResponse; context: TContext };
 
   public willResolveField?(
     source: any,
@@ -71,7 +73,7 @@ export class GraphQLExtensionStack<TContext = any> {
     variables?: { [key: string]: any };
     persistedQueryHit?: boolean;
     persistedQueryRegister?: boolean;
-    extensions?: Record<string, any>;
+    context: TContext;
   }): EndHandler {
     return this.handleDidStart(
       ext => ext.requestDidStart && ext.requestDidStart(o),
@@ -98,7 +100,8 @@ export class GraphQLExtensionStack<TContext = any> {
 
   public willSendResponse(o: {
     graphqlResponse: GraphQLResponse;
-  }): { graphqlResponse: GraphQLResponse } {
+    context: TContext;
+  }): { graphqlResponse: GraphQLResponse; context: TContext } {
     let reference = o;
     // Reverse the array, since this is functions as an end handler
     [...this.extensions].reverse().forEach(extension => {