diff --git a/types/sharedb/index.d.ts b/types/sharedb/index.d.ts
index edf7464412ee7b..640f5dc5f187ad 100644
--- a/types/sharedb/index.d.ts
+++ b/types/sharedb/index.d.ts
@@ -3,7 +3,7 @@
 import { EventEmitter } from "events";
 import { Duplex } from "stream";
 import Agent = require("./lib/agent");
-import { Connection } from "./lib/client";
+import { Connection, Snapshot } from "./lib/client";
 import * as ShareDB from "./lib/sharedb";
 
 interface PubSubOptions {
@@ -56,6 +56,27 @@ declare class sharedb extends EventEmitter {
      *   or session info.
      */
     listen(stream: Duplex, request?: any): Agent;
+    fetch<T = unknown>(
+        agent: Agent,
+        index: string,
+        id: string,
+        callback: (error: Error | null, snapshot?: Snapshot<T>) => void,
+    ): void;
+    fetch<T = unknown>(
+        agent: Agent,
+        index: string,
+        id: string,
+        options: ShareDB.BackendFetchOptions | null,
+        callback: (error: Error | null, snapshot?: Snapshot<T>) => void,
+    ): void;
+    submit(
+        agent: Agent,
+        index: string,
+        id: string,
+        op: SubmitRequest["op"],
+        options: ShareDB.BackendSubmitOptions | null,
+        callback: (error: Error | null, ops: any[], request?: SubmitRequest) => void,
+    ): void;
     close(callback?: BasicCallback): void;
     /**
      * Registers a server middleware function.
diff --git a/types/sharedb/lib/sharedb.d.ts b/types/sharedb/lib/sharedb.d.ts
index fc4e290ca33e83..f1506cb49283fa 100644
--- a/types/sharedb/lib/sharedb.d.ts
+++ b/types/sharedb/lib/sharedb.d.ts
@@ -104,9 +104,9 @@ export interface RawOp {
     d: DocumentID;
 }
 
-export type CreateOp = RawOp & { create: { type: string; data: any }; del: undefined; op: undefined };
-export type DeleteOp = RawOp & { del: boolean; create: undefined; op: undefined };
-export type EditOp = RawOp & { op: any[]; create: undefined; del: undefined };
+export type CreateOp = Partial<RawOp> & { create: { type: string; data: any } };
+export type DeleteOp = Partial<RawOp> & { del: boolean };
+export type EditOp = Partial<RawOp> & { op: any[] };
 
 export type OTType = "ot-text" | "ot-json0" | "ot-json1" | "ot-text-tp2" | "rich-text";
 
@@ -154,6 +154,12 @@ export interface ShareDBSourceOptions {
 // interface ShareDBCreateOptions extends ShareDBSourceOptions {}
 // interface ShareDBDelOptions extends ShareDBSourceOptions {}
 // interface ShareDBSubmitOpOptions extends ShareDBSourceOptions {}
+export interface BackendFetchOptions {
+    snapshotOptions?: Record<string, unknown>;
+}
+export interface BackendSubmitOptions {
+    [key: string]: unknown;
+}
 
 export type Callback = (err: Error) => any;
 
diff --git a/types/sharedb/sharedb-tests.ts b/types/sharedb/sharedb-tests.ts
index a741d9e9bf6e25..0a42123fb18ab6 100644
--- a/types/sharedb/sharedb-tests.ts
+++ b/types/sharedb/sharedb-tests.ts
@@ -92,6 +92,23 @@ console.log(backend.extraDbs);
 backend.addProjection("notes_minimal", "notes", { title: true, creator: true, lastUpdateTime: true });
 const readonlyProjection = backend.projections["notes_minimal"];
 console.log(readonlyProjection.target, readonlyProjection.fields);
+backend.submit({} as Agent, "notes_minimal", "doc1", { create: { data: {}, type: "json uri type" } }, {
+    customField: true,
+    anotherOption: { nested: "value" },
+}, (error, ops, request) => {
+    if (error) {
+        console.error(error.message);
+    }
+    console.log(ops, request && request.collection);
+});
+backend.fetch({} as Agent, "notes_minimal", "doc1", {
+    snapshotOptions: { foo: "bar" },
+}, (error, snapshot) => {
+    if (error) {
+        console.error(error.message);
+    }
+    console.log(snapshot && snapshot.data);
+});
 // backend.projections is used by sharedb internally, so they shouldn't be messed with.
 // Test that marking as readonly in API prevents external modification.
 // @ts-expect-error
@@ -135,9 +152,9 @@ for (const action of submitRelatedActions) {
             request.snapshot,
             request.ops,
             request.channels,
-            request.op.op,
-            request.op.create,
-            request.op.del,
+            (request.op as ShareDB.EditOp).op,
+            (request.op as ShareDB.CreateOp).create,
+            (request.op as ShareDB.DeleteOp).del,
             request.extra.source,
         );
         callback();