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diff --git a/static/api/api.ts b/static/api/api.ts
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+// Copyright (c) 2021, Compiler Explorer Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright
+//       notice, this list of conditions and the following disclaimer in the
+//       documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+import _ from 'underscore';
+
+import { AssemblyDocumentationResponse, AssemblyDocumentationRequest } from '../../types/features/assembly-documentation.interfaces';
+import { FormattingRequest, FormattingResponse } from './formatting.interfaces';
+
+/** Type wrapper allowing .json() to resolve to a concrete type */
+interface TypedResponse<T> extends Response {
+    json(): Promise<T>;
+}
+
+/** Lightweight fetch() wrapper for CE API urls */
+const request = async <R>(uri: string, options?: RequestInit): Promise<TypedResponse<R>> => fetch(
+    `${window.location.origin}${window.httpRoot}api${uri}`,
+    {
+        ...options,
+        credentials: 'include',
+        headers: {
+            ...options?.headers,
+            'Accept': 'application/json',
+        },
+    },
+);
+
+/** GET /api/asm/:arch/:instruction */
+export const getAssemblyDocumentation = async (
+    options: AssemblyDocumentationRequest,
+) => await request<AssemblyDocumentationResponse>(`/asm/${options.instructionSet}/${options.opcode}`);
+
+/** POST /api/format/:formatter */
+export const getFormattedCode = async (
+    options: FormattingRequest,
+) => await request<FormattingResponse>(`/format/${options.formatterId}`, {
+    method: 'POST',
+    headers: {
+        'Content-Type': 'application/json',
+    },
+    body: JSON.stringify(_.pick(options, 'source', 'base', 'tabWidth', 'useSpaces')),
+});