diff --git a/packages/http/src/backends/browser_xhr.ts b/packages/http/src/backends/browser_xhr.ts
index 00ae0e60a0..d093413efa 100644
--- a/packages/http/src/backends/browser_xhr.ts
+++ b/packages/http/src/backends/browser_xhr.ts
@@ -14,6 +14,7 @@ import {Injectable} from '@angular/core';
  * Take care not to evaluate this in non-browser contexts.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class BrowserXhr {
diff --git a/packages/http/src/backends/jsonp_backend.ts b/packages/http/src/backends/jsonp_backend.ts
index 85a015cb3d..00dcaa35e2 100644
--- a/packages/http/src/backends/jsonp_backend.ts
+++ b/packages/http/src/backends/jsonp_backend.ts
@@ -24,6 +24,7 @@ const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use GET request method.';
  * Base class for an in-flight JSONP request.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class JSONPConnection implements Connection {
   // TODO(issue/24571): remove '!'.
@@ -140,6 +141,7 @@ export class JSONPConnection implements Connection {
  * A {@link ConnectionBackend} that uses the JSONP strategy of making requests.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class JSONPBackend extends ConnectionBackend {
diff --git a/packages/http/src/backends/xhr_backend.ts b/packages/http/src/backends/xhr_backend.ts
index bef00acec0..429b66978a 100644
--- a/packages/http/src/backends/xhr_backend.ts
+++ b/packages/http/src/backends/xhr_backend.ts
@@ -29,6 +29,7 @@ const XSSI_PREFIX = /^\)\]\}',?\n/;
  * the {@link MockConnection} may be interacted with in tests.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class XHRConnection implements Connection {
   request: Request;
@@ -189,6 +190,7 @@ export class XHRConnection implements Connection {
  * details.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class CookieXSRFStrategy implements XSRFStrategy {
   constructor(
@@ -228,6 +230,7 @@ export class CookieXSRFStrategy implements XSRFStrategy {
  * }
  * ```
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class XHRBackend implements ConnectionBackend {
diff --git a/packages/http/src/base_request_options.ts b/packages/http/src/base_request_options.ts
index e0acd15062..beda7bba39 100644
--- a/packages/http/src/base_request_options.ts
+++ b/packages/http/src/base_request_options.ts
@@ -38,6 +38,7 @@ import {URLSearchParams} from './url_search_params';
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class RequestOptions {
   /**
@@ -201,6 +202,7 @@ export class RequestOptions {
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class BaseRequestOptions extends RequestOptions {
diff --git a/packages/http/src/base_response_options.ts b/packages/http/src/base_response_options.ts
index 992d960852..340c10de99 100644
--- a/packages/http/src/base_response_options.ts
+++ b/packages/http/src/base_response_options.ts
@@ -41,6 +41,7 @@ import {ResponseOptionsArgs} from './interfaces';
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class ResponseOptions {
   // TODO: FormData | Blob
@@ -160,6 +161,7 @@ export class ResponseOptions {
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class BaseResponseOptions extends ResponseOptions {
diff --git a/packages/http/src/enums.ts b/packages/http/src/enums.ts
index 4152cbe3a1..e8e745afa0 100644
--- a/packages/http/src/enums.ts
+++ b/packages/http/src/enums.ts
@@ -9,6 +9,7 @@
 /**
  * Supported http methods.
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export enum RequestMethod {
   Get,
@@ -25,6 +26,7 @@ export enum RequestMethod {
  * [States](http://www.w3.org/TR/XMLHttpRequest/#states) from the `XMLHttpRequest` spec, but with an
  * additional "CANCELLED" state.
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export enum ReadyState {
   Unsent,
@@ -39,6 +41,7 @@ export enum ReadyState {
  * Acceptable response types to be associated with a {@link Response}, based on
  * [ResponseType](https://fetch.spec.whatwg.org/#responsetype) from the Fetch spec.
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export enum ResponseType {
   Basic,
@@ -65,6 +68,7 @@ export enum ContentType {
 /**
  * Define which buffer to use to store the response
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export enum ResponseContentType {
   Text,
diff --git a/packages/http/src/headers.ts b/packages/http/src/headers.ts
index cd201a2a1a..ba2c4c2162 100644
--- a/packages/http/src/headers.ts
+++ b/packages/http/src/headers.ts
@@ -34,6 +34,7 @@
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class Headers {
   /** @internal header names are lower case */
diff --git a/packages/http/src/http.ts b/packages/http/src/http.ts
index 0fbd06c96b..907e5a8324 100644
--- a/packages/http/src/http.ts
+++ b/packages/http/src/http.ts
@@ -101,6 +101,7 @@ function mergeOptions(
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class Http {
@@ -189,6 +190,7 @@ export class Http {
 
 /**
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class Jsonp extends Http {
diff --git a/packages/http/src/http_module.ts b/packages/http/src/http_module.ts
index 89c86e935d..fb8217c5c7 100644
--- a/packages/http/src/http_module.ts
+++ b/packages/http/src/http_module.ts
@@ -41,6 +41,7 @@ export function jsonpFactory(jsonpBackend: JSONPBackend, requestOptions: Request
  * The module that includes http's providers
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @NgModule({
   providers: [
@@ -61,6 +62,7 @@ export class HttpModule {
  * The module that includes jsonp's providers
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @NgModule({
   providers: [
diff --git a/packages/http/src/interfaces.ts b/packages/http/src/interfaces.ts
index e8252f32da..2575449895 100644
--- a/packages/http/src/interfaces.ts
+++ b/packages/http/src/interfaces.ts
@@ -18,6 +18,7 @@ import {URLSearchParams} from './url_search_params';
  * {@link Request}.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export abstract class ConnectionBackend { abstract createConnection(request: any): Connection; }
 
@@ -25,6 +26,7 @@ export abstract class ConnectionBackend { abstract createConnection(request: any
  * Abstract class from which real connections are derived.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export abstract class Connection {
   // TODO(issue/24571): remove '!'.
@@ -38,6 +40,7 @@ export abstract class Connection {
  * An XSRFStrategy configures XSRF protection (e.g. via headers) on an HTTP request.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export abstract class XSRFStrategy { abstract configureRequest(req: Request): void; }
 
@@ -46,6 +49,7 @@ export abstract class XSRFStrategy { abstract configureRequest(req: Request): vo
  * [RequestInit](https://fetch.spec.whatwg.org/#requestinit) from the Fetch spec.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export interface RequestOptionsArgs {
   url?: string|null;
@@ -69,6 +73,7 @@ export interface RequestArgs extends RequestOptionsArgs { url: string|null; }
  * [ResponseInit](https://fetch.spec.whatwg.org/#responseinit) from the Fetch spec.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export interface ResponseOptionsArgs {
   body?: string|Object|FormData|ArrayBuffer|Blob|null;
diff --git a/packages/http/src/static_request.ts b/packages/http/src/static_request.ts
index 524c2e64bf..f55fa8acd0 100644
--- a/packages/http/src/static_request.ts
+++ b/packages/http/src/static_request.ts
@@ -53,6 +53,7 @@ import {URLSearchParams} from './url_search_params';
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class Request extends Body {
   /**
diff --git a/packages/http/src/static_response.ts b/packages/http/src/static_response.ts
index 9f268f4568..66b760186d 100644
--- a/packages/http/src/static_response.ts
+++ b/packages/http/src/static_response.ts
@@ -34,6 +34,7 @@ import {Headers} from './headers';
  * most significant.
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class Response extends Body {
   /**
diff --git a/packages/http/src/url_search_params.ts b/packages/http/src/url_search_params.ts
index 3e27038e36..6d8e8cd70a 100644
--- a/packages/http/src/url_search_params.ts
+++ b/packages/http/src/url_search_params.ts
@@ -23,6 +23,7 @@ function paramParser(rawParams: string = ''): Map<string, string[]> {
 }
 /**
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  **/
 export class QueryEncoder {
   encodeKey(key: string): string { return standardEncoding(key); }
@@ -77,6 +78,7 @@ function standardEncoding(v: string): string {
  * let params = new URLSearchParams('', new MyQueryEncoder());
  * ```
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class URLSearchParams {
   paramsMap: Map<string, string[]>;
diff --git a/packages/http/src/version.ts b/packages/http/src/version.ts
index 8b6e32cb6f..a0a4ac7ebd 100644
--- a/packages/http/src/version.ts
+++ b/packages/http/src/version.ts
@@ -15,5 +15,6 @@
 import {Version} from '@angular/core';
 /**
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export const VERSION = new Version('0.0.0-PLACEHOLDER');
diff --git a/packages/http/testing/src/mock_backend.ts b/packages/http/testing/src/mock_backend.ts
index f62fbd5bed..5c8a5aeb88 100644
--- a/packages/http/testing/src/mock_backend.ts
+++ b/packages/http/testing/src/mock_backend.ts
@@ -37,6 +37,7 @@ import {take} from 'rxjs/operators';
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 export class MockConnection implements Connection {
   // TODO: Name `readyState` should change to be more generic, and states could be made to be more
@@ -190,6 +191,7 @@ export class MockConnection implements Connection {
  * ```
  *
  * @deprecated see https://angular.io/guide/http
+ * @publicApi
  */
 @Injectable()
 export class MockBackend implements ConnectionBackend {