diff --git a/src/fixtures/logstash_fields.js b/src/fixtures/logstash_fields.js
index 0ae6c62def0f7..ab96b69851b71 100644
--- a/src/fixtures/logstash_fields.js
+++ b/src/fixtures/logstash_fields.js
@@ -19,7 +19,7 @@
 
 import { castEsToKbnFieldTypeName } from '../plugins/data/common';
 // eslint-disable-next-line max-len
-import { shouldReadFieldFromDocValues } from '../legacy/server/index_patterns/service/lib/field_capabilities/should_read_field_from_doc_values';
+import { shouldReadFieldFromDocValues } from '../plugins/data/server';
 
 function stubbedLogstashFields() {
   return [
diff --git a/src/legacy/core_plugins/data/public/index_patterns/index_patterns/index_patterns.ts b/src/legacy/core_plugins/data/public/index_patterns/index_patterns/index_patterns.ts
index d445e2e58cd54..4767b6d3a3ca7 100644
--- a/src/legacy/core_plugins/data/public/index_patterns/index_patterns/index_patterns.ts
+++ b/src/legacy/core_plugins/data/public/index_patterns/index_patterns/index_patterns.ts
@@ -29,7 +29,7 @@ import { fieldFormats } from 'ui/registry/field_formats';
 
 import { createIndexPatternCache } from './_pattern_cache';
 import { IndexPattern } from './index_pattern';
-import { IndexPatternsApiClient } from './index_patterns_api_client';
+import { IndexPatternsApiClient, GetFieldsOptions } from './index_patterns_api_client';
 
 const indexPatternCache = createIndexPatternCache();
 
@@ -93,6 +93,14 @@ export class IndexPatterns {
     });
   };
 
+  getFieldsForTimePattern = (options: GetFieldsOptions = {}) => {
+    return this.apiClient.getFieldsForTimePattern(options);
+  };
+
+  getFieldsForWildcard = (options: GetFieldsOptions = {}) => {
+    return this.apiClient.getFieldsForWildcard(options);
+  };
+
   clearCache = (id?: string) => {
     this.savedObjectsCache = null;
     if (id) {
diff --git a/src/legacy/core_plugins/vis_type_timeseries/server/lib/get_index_pattern_service.js b/src/legacy/core_plugins/vis_type_timeseries/server/lib/get_index_pattern_service.js
index 0766e6a48765f..54e90ab7dd9b7 100644
--- a/src/legacy/core_plugins/vis_type_timeseries/server/lib/get_index_pattern_service.js
+++ b/src/legacy/core_plugins/vis_type_timeseries/server/lib/get_index_pattern_service.js
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { IndexPatternsService } from '../../../../server/index_patterns/service';
+import { IndexPatternsFetcher } from '../../../../../plugins/data/server/';
 export const getIndexPatternService = {
   assign: 'indexPatternsService',
   method(req) {
@@ -25,6 +25,6 @@ export const getIndexPatternService = {
     const callDataCluster = (...args) => {
       return dataCluster.callWithRequest(req, ...args);
     };
-    return new IndexPatternsService(callDataCluster);
+    return new IndexPatternsFetcher(callDataCluster);
   },
 };
diff --git a/src/legacy/server/index_patterns/index.ts b/src/legacy/server/index_patterns/index.ts
index eea8a4a998e2d..75d0038cf9023 100644
--- a/src/legacy/server/index_patterns/index.ts
+++ b/src/legacy/server/index_patterns/index.ts
@@ -17,7 +17,9 @@
  * under the License.
  */
 
-// @ts-ignore no types
 export { indexPatternsMixin } from './mixin';
-export { IndexPatternsService, FieldDescriptor } from './service';
+export {
+  IndexPatternsFetcher,
+  FieldDescriptor,
+} from '../../../plugins/data/server/index_patterns/fetcher';
 export { IndexPatternsServiceFactory } from './mixin';
diff --git a/src/legacy/server/index_patterns/mixin.ts b/src/legacy/server/index_patterns/mixin.ts
index a7180d6a2d70e..6b04c3842007b 100644
--- a/src/legacy/server/index_patterns/mixin.ts
+++ b/src/legacy/server/index_patterns/mixin.ts
@@ -17,11 +17,10 @@
  * under the License.
  */
 
-import { IndexPatternsService } from './service';
+import { IndexPatternsFetcher } from '../../../plugins/data/server';
 import KbnServer from '../kbn_server';
 import { APICaller, CallAPIOptions } from '../../../core/server';
 import { Legacy } from '../../../../kibana';
-import { registerRoutes } from './routes';
 
 export function indexPatternsMixin(kbnServer: KbnServer, server: Legacy.Server) {
   /**
@@ -31,7 +30,7 @@ export function indexPatternsMixin(kbnServer: KbnServer, server: Legacy.Server)
    *  @type {IndexPatternsService}
    */
   server.decorate('server', 'indexPatternsServiceFactory', ({ callCluster }) => {
-    return new IndexPatternsService(callCluster);
+    return new IndexPatternsFetcher(callCluster);
   });
 
   /**
@@ -50,10 +49,8 @@ export function indexPatternsMixin(kbnServer: KbnServer, server: Legacy.Server)
     ) => callWithRequest(request, endpoint, params, options);
     return server.indexPatternsServiceFactory({ callCluster });
   });
-
-  registerRoutes(kbnServer.newPlatform.setup.core);
 }
 
 export type IndexPatternsServiceFactory = (args: {
   callCluster: (endpoint: string, clientParams: any, options: any) => Promise<any>;
-}) => IndexPatternsService;
+}) => IndexPatternsFetcher;
diff --git a/src/legacy/server/kbn_server.d.ts b/src/legacy/server/kbn_server.d.ts
index 8b0a30e456329..448a418abcb8a 100644
--- a/src/legacy/server/kbn_server.d.ts
+++ b/src/legacy/server/kbn_server.d.ts
@@ -150,5 +150,5 @@ export default class KbnServer {
 export { Server, Request, ResponseToolkit } from 'hapi';
 
 // Re-export commonly accessed api types.
-export { IndexPatternsService } from './index_patterns';
+export { IndexPatternsFetcher as IndexPatternsService } from './index_patterns';
 export { SavedObjectsLegacyService, SavedObjectsClient } from 'src/core/server';
diff --git a/src/plugins/data/server/index.ts b/src/plugins/data/server/index.ts
index df933167cee25..f0b6117b928cd 100644
--- a/src/plugins/data/server/index.ts
+++ b/src/plugins/data/server/index.ts
@@ -25,6 +25,11 @@ export function plugin(initializerContext: PluginInitializerContext) {
 }
 
 export { DataServerPlugin as Plugin };
+export {
+  IndexPatternsFetcher,
+  FieldDescriptor,
+  shouldReadFieldFromDocValues,
+} from './index_patterns';
 
 export * from './search';
 
diff --git a/src/legacy/server/index_patterns/service/index.ts b/src/plugins/data/server/index_patterns/fetcher/index.ts
similarity index 89%
rename from src/legacy/server/index_patterns/service/index.ts
rename to src/plugins/data/server/index_patterns/fetcher/index.ts
index 496c4ba7b5b6f..19306696885db 100644
--- a/src/legacy/server/index_patterns/service/index.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/index.ts
@@ -17,4 +17,5 @@
  * under the License.
  */
 
-export * from './index_patterns_service';
+export * from './index_patterns_fetcher';
+export { shouldReadFieldFromDocValues } from './lib';
diff --git a/src/legacy/server/index_patterns/service/index_patterns_service.ts b/src/plugins/data/server/index_patterns/fetcher/index_patterns_fetcher.ts
similarity index 98%
rename from src/legacy/server/index_patterns/service/index_patterns_service.ts
rename to src/plugins/data/server/index_patterns/fetcher/index_patterns_fetcher.ts
index 62cf51828a4cc..5f1493a49ab7d 100644
--- a/src/legacy/server/index_patterns/service/index_patterns_service.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/index_patterns_fetcher.ts
@@ -36,7 +36,7 @@ interface FieldSubType {
   nested?: { path: string };
 }
 
-export class IndexPatternsService {
+export class IndexPatternsFetcher {
   private _callDataCluster: APICaller;
 
   constructor(callDataCluster: APICaller) {
diff --git a/src/legacy/server/index_patterns/service/lib/errors.ts b/src/plugins/data/server/index_patterns/fetcher/lib/errors.ts
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/errors.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/errors.ts
diff --git a/src/legacy/server/index_patterns/service/lib/es_api.test.js b/src/plugins/data/server/index_patterns/fetcher/lib/es_api.test.js
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/es_api.test.js
rename to src/plugins/data/server/index_patterns/fetcher/lib/es_api.test.js
diff --git a/src/legacy/server/index_patterns/service/lib/es_api.ts b/src/plugins/data/server/index_patterns/fetcher/lib/es_api.ts
similarity index 99%
rename from src/legacy/server/index_patterns/service/lib/es_api.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/es_api.ts
index 63c1824784dbd..92b64fafddd66 100644
--- a/src/legacy/server/index_patterns/service/lib/es_api.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/es_api.ts
@@ -18,7 +18,6 @@
  */
 
 import { APICaller } from 'src/core/server';
-// @ts-ignore
 import { convertEsError } from './errors';
 import { FieldCapsResponse } from './field_capabilities';
 
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/__fixtures__/es_field_caps_response.json b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/__fixtures__/es_field_caps_response.json
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/__fixtures__/es_field_caps_response.json
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/__fixtures__/es_field_caps_response.json
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_capabilities.test.js b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_capabilities.test.js
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/field_capabilities.test.js
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_capabilities.test.js
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_capabilities.ts b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_capabilities.ts
similarity index 97%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/field_capabilities.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_capabilities.ts
index 05e8d591f13a9..c275fb714088e 100644
--- a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_capabilities.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_capabilities.ts
@@ -23,7 +23,7 @@ import { APICaller } from 'src/core/server';
 import { callFieldCapsApi } from '../es_api';
 import { FieldCapsResponse, readFieldCapsResponse } from './field_caps_response';
 import { mergeOverrides } from './overrides';
-import { FieldDescriptor } from '../../index_patterns_service';
+import { FieldDescriptor } from '../../index_patterns_fetcher';
 
 export function concatIfUniq<T>(arr: T[], value: T) {
   return arr.includes(value) ? arr : arr.concat(value);
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.test.js b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.test.js
similarity index 99%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.test.js
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.test.js
index c0a5492aaba36..cf4af615b9577 100644
--- a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.test.js
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.test.js
@@ -24,7 +24,7 @@ import sinon from 'sinon';
 import * as shouldReadFieldFromDocValuesNS from './should_read_field_from_doc_values';
 import { shouldReadFieldFromDocValues } from './should_read_field_from_doc_values';
 
-import { getKbnFieldType } from '../../../../../../plugins/data/common';
+import { getKbnFieldType } from '../../../../../../data/common';
 import { readFieldCapsResponse } from './field_caps_response';
 import esResponse from './__fixtures__/es_field_caps_response.json';
 
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.ts b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.ts
similarity index 98%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.ts
index 19288014de297..06eb30db0b24b 100644
--- a/src/legacy/server/index_patterns/service/lib/field_capabilities/field_caps_response.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/field_caps_response.ts
@@ -18,9 +18,9 @@
  */
 
 import { uniq } from 'lodash';
-import { FieldDescriptor } from '../..';
+import { castEsToKbnFieldTypeName } from '../../../../../common';
 import { shouldReadFieldFromDocValues } from './should_read_field_from_doc_values';
-import { castEsToKbnFieldTypeName } from '../../../../../../plugins/data/common';
+import { FieldDescriptor } from '../../../fetcher';
 
 interface FieldCapObject {
   type: string;
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/index.ts b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/index.ts
similarity index 91%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/index.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/index.ts
index 8ac4225557784..6a541aff56471 100644
--- a/src/legacy/server/index_patterns/service/lib/field_capabilities/index.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/index.ts
@@ -19,3 +19,4 @@
 
 export { getFieldCapabilities } from './field_capabilities';
 export { FieldCapsResponse } from './field_caps_response';
+export { shouldReadFieldFromDocValues } from './should_read_field_from_doc_values';
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/overrides.ts b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/overrides.ts
similarity index 95%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/overrides.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/overrides.ts
index 6310bf02e4430..518bfeccac01a 100644
--- a/src/legacy/server/index_patterns/service/lib/field_capabilities/overrides.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/overrides.ts
@@ -18,7 +18,7 @@
  */
 
 import { merge } from 'lodash';
-import { FieldDescriptor } from '../../index_patterns_service';
+import { FieldDescriptor } from '../../index_patterns_fetcher';
 
 const OVERRIDES: Record<string, Partial<FieldDescriptor>> = {
   _source: { type: '_source' },
diff --git a/src/legacy/server/index_patterns/service/lib/field_capabilities/should_read_field_from_doc_values.ts b/src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/should_read_field_from_doc_values.ts
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/field_capabilities/should_read_field_from_doc_values.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/field_capabilities/should_read_field_from_doc_values.ts
diff --git a/src/legacy/server/index_patterns/service/lib/index.ts b/src/plugins/data/server/index_patterns/fetcher/lib/index.ts
similarity index 90%
rename from src/legacy/server/index_patterns/service/lib/index.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/index.ts
index cd239b3753aa3..20e74d2b1a579 100644
--- a/src/legacy/server/index_patterns/service/lib/index.ts
+++ b/src/plugins/data/server/index_patterns/fetcher/lib/index.ts
@@ -17,8 +17,6 @@
  * under the License.
  */
 
-export { getFieldCapabilities } from './field_capabilities';
-// @ts-ignore
+export { getFieldCapabilities, shouldReadFieldFromDocValues } from './field_capabilities';
 export { resolveTimePattern } from './resolve_time_pattern';
-// @ts-ignore
 export { createNoMatchingIndicesError } from './errors';
diff --git a/src/legacy/server/index_patterns/service/lib/resolve_time_pattern.test.js b/src/plugins/data/server/index_patterns/fetcher/lib/resolve_time_pattern.test.js
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/resolve_time_pattern.test.js
rename to src/plugins/data/server/index_patterns/fetcher/lib/resolve_time_pattern.test.js
diff --git a/src/legacy/server/index_patterns/service/lib/resolve_time_pattern.ts b/src/plugins/data/server/index_patterns/fetcher/lib/resolve_time_pattern.ts
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/resolve_time_pattern.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/resolve_time_pattern.ts
diff --git a/src/legacy/server/index_patterns/service/lib/time_pattern_to_wildcard.test.ts b/src/plugins/data/server/index_patterns/fetcher/lib/time_pattern_to_wildcard.test.ts
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/time_pattern_to_wildcard.test.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/time_pattern_to_wildcard.test.ts
diff --git a/src/legacy/server/index_patterns/service/lib/time_pattern_to_wildcard.ts b/src/plugins/data/server/index_patterns/fetcher/lib/time_pattern_to_wildcard.ts
similarity index 100%
rename from src/legacy/server/index_patterns/service/lib/time_pattern_to_wildcard.ts
rename to src/plugins/data/server/index_patterns/fetcher/lib/time_pattern_to_wildcard.ts
diff --git a/src/plugins/data/server/index_patterns/index.ts b/src/plugins/data/server/index_patterns/index.ts
new file mode 100644
index 0000000000000..6937fa22c4e5d
--- /dev/null
+++ b/src/plugins/data/server/index_patterns/index.ts
@@ -0,0 +1,21 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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.
+ */
+
+export { IndexPatternsFetcher, FieldDescriptor, shouldReadFieldFromDocValues } from './fetcher';
+export { IndexPatternsService } from './index_patterns_service';
diff --git a/src/plugins/data/server/index_patterns/index_patterns_service.ts b/src/plugins/data/server/index_patterns/index_patterns_service.ts
new file mode 100644
index 0000000000000..30d199c0e522e
--- /dev/null
+++ b/src/plugins/data/server/index_patterns/index_patterns_service.ts
@@ -0,0 +1,30 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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.
+ */
+
+import { CoreSetup } from 'kibana/server';
+import { Plugin } from '../../../../core/server';
+import { registerRoutes } from './routes';
+
+export class IndexPatternsService implements Plugin<void> {
+  public setup({ http, elasticsearch }: CoreSetup) {
+    registerRoutes(http, elasticsearch);
+  }
+
+  public start() {}
+}
diff --git a/src/legacy/server/index_patterns/routes.ts b/src/plugins/data/server/index_patterns/routes.ts
similarity index 90%
rename from src/legacy/server/index_patterns/routes.ts
rename to src/plugins/data/server/index_patterns/routes.ts
index fb78b94e0f77f..7975e923e219b 100644
--- a/src/legacy/server/index_patterns/routes.ts
+++ b/src/plugins/data/server/index_patterns/routes.ts
@@ -25,18 +25,18 @@ import {
   RequestHandlerContext,
   APICaller,
   CallAPIOptions,
-} from '../../../core/server';
-import { IndexPatternsService } from './service';
+} from '../../../../core/server';
+import { IndexPatternsFetcher } from './fetcher';
 
-export function registerRoutes(core: CoreSetup) {
-  const getIndexPatternsService = async (request: KibanaRequest): Promise<IndexPatternsService> => {
-    const client = await core.elasticsearch.dataClient$.pipe(first()).toPromise();
+export function registerRoutes(http: CoreSetup['http'], elasticsearch: CoreSetup['elasticsearch']) {
+  const getIndexPatternsService = async (request: KibanaRequest): Promise<IndexPatternsFetcher> => {
+    const client = await elasticsearch.dataClient$.pipe(first()).toPromise();
     const callCluster: APICaller = (
       endpoint: string,
       params?: Record<string, any>,
       options?: CallAPIOptions
     ) => client.asScoped(request).callAsCurrentUser(endpoint, params, options);
-    return new Promise(resolve => resolve(new IndexPatternsService(callCluster)));
+    return new Promise(resolve => resolve(new IndexPatternsFetcher(callCluster)));
   };
 
   const parseMetaFields = (metaFields: string | string[]) => {
@@ -49,7 +49,7 @@ export function registerRoutes(core: CoreSetup) {
     return parsedFields;
   };
 
-  const router = core.http.createRouter();
+  const router = http.createRouter();
   router.get(
     {
       path: '/api/index_patterns/_fields_for_wildcard',
diff --git a/src/plugins/data/server/plugin.ts b/src/plugins/data/server/plugin.ts
index 9cf08b0702e9e..e81250e653ebd 100644
--- a/src/plugins/data/server/plugin.ts
+++ b/src/plugins/data/server/plugin.ts
@@ -18,19 +18,21 @@
  */
 
 import { PluginInitializerContext, CoreSetup, CoreStart, Plugin } from '../../../core/server';
+import { IndexPatternsService } from './index_patterns';
 import { ISearchSetup } from './search';
 import { SearchService } from './search/search_service';
 
 export interface DataPluginSetup {
   search: ISearchSetup;
 }
-
 export class DataServerPlugin implements Plugin<DataPluginSetup> {
   private readonly searchService: SearchService;
+  private readonly indexPatterns = new IndexPatternsService();
   constructor(initializerContext: PluginInitializerContext) {
     this.searchService = new SearchService(initializerContext);
   }
   public setup(core: CoreSetup) {
+    this.indexPatterns.setup(core);
     return {
       search: this.searchService.setup(core),
     };
diff --git a/test/api_integration/apis/index_patterns/es_errors/errors.js b/test/api_integration/apis/index_patterns/es_errors/errors.js
index 7e04e3f7204d7..4e50b965211c2 100644
--- a/test/api_integration/apis/index_patterns/es_errors/errors.js
+++ b/test/api_integration/apis/index_patterns/es_errors/errors.js
@@ -26,7 +26,7 @@ import {
   createNoMatchingIndicesError,
   isNoMatchingIndicesError,
   convertEsError
-} from '../../../../../src/legacy/server/index_patterns/service/lib/errors';
+} from '../../../../../src/plugins/data/server/index_patterns/fetcher/lib/errors';
 
 import {
   getIndexNotFoundError,
diff --git a/x-pack/legacy/plugins/apm/server/lib/index_pattern/getKueryBarIndexPattern.ts b/x-pack/legacy/plugins/apm/server/lib/index_pattern/getKueryBarIndexPattern.ts
index 33d404009ae20..a5ba4573cfd58 100644
--- a/x-pack/legacy/plugins/apm/server/lib/index_pattern/getKueryBarIndexPattern.ts
+++ b/x-pack/legacy/plugins/apm/server/lib/index_pattern/getKueryBarIndexPattern.ts
@@ -7,7 +7,7 @@
 import { Legacy } from 'kibana';
 import { StaticIndexPattern } from 'ui/index_patterns';
 import { APICaller } from 'src/core/server';
-import { IndexPatternsService } from '../../../../../../../src/legacy/server/index_patterns/service';
+import { IndexPatternsFetcher } from '../../../../../../../src/plugins/data/server';
 import { Setup } from '../helpers/setup_request';
 
 export const getKueryBarIndexPattern = async ({
@@ -21,7 +21,7 @@ export const getKueryBarIndexPattern = async ({
 }) => {
   const { indices } = setup;
 
-  const indexPatternsService = new IndexPatternsService(
+  const indexPatternsFetcher = new IndexPatternsFetcher(
     (...rest: Parameters<APICaller>) =>
       request.server.plugins.elasticsearch
         .getCluster('data')
@@ -40,7 +40,7 @@ export const getKueryBarIndexPattern = async ({
 
   const configuredIndices = indexNames.map(name => indicesMap[name]);
 
-  const fields = await indexPatternsService.getFieldsForWildcard({
+  const fields = await indexPatternsFetcher.getFieldsForWildcard({
     pattern: configuredIndices
   });
 
diff --git a/x-pack/legacy/plugins/beats_management/public/lib/adapters/elasticsearch/rest.ts b/x-pack/legacy/plugins/beats_management/public/lib/adapters/elasticsearch/rest.ts
index d4a42ba662db4..526728bd77cac 100644
--- a/x-pack/legacy/plugins/beats_management/public/lib/adapters/elasticsearch/rest.ts
+++ b/x-pack/legacy/plugins/beats_management/public/lib/adapters/elasticsearch/rest.ts
@@ -7,16 +7,16 @@
 import { fromKueryExpression, toElasticsearchQuery } from '@kbn/es-query';
 import { isEmpty } from 'lodash';
 import { npStart } from 'ui/new_platform';
-import { RestAPIAdapter } from '../rest_api/adapter_types';
 import { ElasticsearchAdapter } from './adapter_types';
 import { AutocompleteSuggestion } from '../../../../../../../../src/plugins/data/public';
+import { setup as data } from '../../../../../../../../src/legacy/core_plugins/data/public/legacy';
 
 const getAutocompleteProvider = (language: string) =>
   npStart.plugins.data.autocomplete.getProvider(language);
 
 export class RestElasticsearchAdapter implements ElasticsearchAdapter {
   private cachedIndexPattern: any = null;
-  constructor(private readonly api: RestAPIAdapter, private readonly indexPatternName: string) {}
+  constructor(private readonly indexPatternName: string) {}
 
   public isKueryValid(kuery: string): boolean {
     try {
@@ -65,9 +65,9 @@ export class RestElasticsearchAdapter implements ElasticsearchAdapter {
     if (this.cachedIndexPattern) {
       return this.cachedIndexPattern;
     }
-    const res = await this.api.get<any>(
-      `/api/index_patterns/_fields_for_wildcard?pattern=${this.indexPatternName}`
-    );
+    const res = await data.indexPatterns.indexPatterns.getFieldsForWildcard({
+      pattern: this.indexPatternName,
+    });
     if (isEmpty(res.fields)) {
       return;
     }
diff --git a/x-pack/legacy/plugins/beats_management/public/lib/compose/kibana.ts b/x-pack/legacy/plugins/beats_management/public/lib/compose/kibana.ts
index 3d8ca51e006bf..2ebda89ba13fd 100644
--- a/x-pack/legacy/plugins/beats_management/public/lib/compose/kibana.ts
+++ b/x-pack/legacy/plugins/beats_management/public/lib/compose/kibana.ts
@@ -35,7 +35,7 @@ const onKibanaReady = chrome.dangerouslyGetActiveInjector;
 
 export function compose(): FrontendLibs {
   const api = new AxiosRestAPIAdapter(chrome.getXsrfToken(), chrome.getBasePath());
-  const esAdapter = new RestElasticsearchAdapter(api, INDEX_NAMES.BEATS);
+  const esAdapter = new RestElasticsearchAdapter(INDEX_NAMES.BEATS);
   const elasticsearchLib = new ElasticsearchLib(esAdapter);
   const configBlocks = new ConfigBlocksLib(
     new RestConfigBlocksAdapter(api),
diff --git a/x-pack/legacy/plugins/lens/server/routes/existing_fields.ts b/x-pack/legacy/plugins/lens/server/routes/existing_fields.ts
index b6ff1e6ac757b..ad1af966983fb 100644
--- a/x-pack/legacy/plugins/lens/server/routes/existing_fields.ts
+++ b/x-pack/legacy/plugins/lens/server/routes/existing_fields.ts
@@ -11,10 +11,7 @@ import _ from 'lodash';
 import { IScopedClusterClient } from 'src/core/server';
 import { CoreSetup } from 'src/core/server';
 import { BASE_API_URL } from '../../common';
-import {
-  FieldDescriptor,
-  IndexPatternsService,
-} from '../../../../../../src/legacy/server/index_patterns/service';
+import { FieldDescriptor, IndexPatternsFetcher } from '../../../../../../src/plugins/data/server';
 
 /**
  * The number of docs to sample to determine field empty status.
@@ -42,11 +39,11 @@ export async function existingFieldsRoute(setup: CoreSetup) {
     async (context, req, res) => {
       const { indexPatternTitle } = req.params;
       const requestClient = context.core.elasticsearch.dataClient;
-      const indexPatternsService = new IndexPatternsService(requestClient.callAsCurrentUser);
+      const indexPatternsFetcher = new IndexPatternsFetcher(requestClient.callAsCurrentUser);
       const { fromDate, toDate, timeFieldName } = req.query;
 
       try {
-        const fields = await indexPatternsService.getFieldsForWildcard({
+        const fields = await indexPatternsFetcher.getFieldsForWildcard({
           pattern: indexPatternTitle,
           // TODO: Pull this from kibana advanced settings
           metaFields: ['_source', '_id', '_type', '_index', '_score'],