diff --git a/.github/workflows/udd.yml b/.github/workflows/udd.yml
index 353f088..7bc1850 100644
--- a/.github/workflows/udd.yml
+++ b/.github/workflows/udd.yml
@@ -16,8 +16,8 @@ jobs:
       - name: Update dependencies
         run: >
           deno run --allow-net --allow-read --allow-write=deps/
-          --allow-run=deno https://deno.land/x/udd@0.7.2/main.ts deps/*.ts
-          --test="deno test --allow-read --allow-write"
+          --allow-run=deno https://deno.land/x/udd@0.8.2/main.ts deps/*.ts
+          --test="deno test --allow-read"
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v3
         with:
diff --git a/deps/scrapbox-rest.ts b/deps/scrapbox-rest.ts
index 63b2633..f6cfa5b 100644
--- a/deps/scrapbox-rest.ts
+++ b/deps/scrapbox-rest.ts
@@ -16,7 +16,8 @@ export type {
   NotPrivilegeError,
   Page,
   PageList,
-  PageSnapshot,
+  PageSnapshotList,
+  PageSnapshotResult,
   ProjectId,
   ProjectResponse,
   ProjectSearchResult,
@@ -25,4 +26,4 @@ export type {
   SessionError,
   Snapshot,
   TweetInfo,
-} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.7.1/rest.ts";
+} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.9.0/rest.ts";
diff --git a/deps/scrapbox.ts b/deps/scrapbox.ts
index bac461b..98efe9a 100644
--- a/deps/scrapbox.ts
+++ b/deps/scrapbox.ts
@@ -2,8 +2,8 @@ export type {
   BaseLine,
   Line,
   Scrapbox,
-} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.7.1/userscript.ts";
+} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.9.0/userscript.ts";
 export type {
   BaseStore,
-} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.7.1/baseStore.ts";
+} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.9.0/baseStore.ts";
 export * from "https://esm.sh/@progfay/scrapbox-parser@9.0.0";
diff --git a/rest/getSnapshots.ts b/rest/getSnapshots.ts
deleted file mode 100644
index e369207..0000000
--- a/rest/getSnapshots.ts
+++ /dev/null
@@ -1,138 +0,0 @@
-import type {
-  ErrorLike,
-  NotFoundError,
-  NotLoggedInError,
-  NotMemberError,
-  PageSnapshot,
-  Snapshot,
-} from "../deps/scrapbox-rest.ts";
-import { cookie } from "./auth.ts";
-import { BaseOptions, Result, setDefaults } from "./util.ts";
-import { makeError } from "./error.ts";
-
-/** 不正なfollowingIdを渡されたときに発生するエラー */
-export interface InvalidPageSnapshotIdError extends ErrorLike {
-  name: "InvalidPageSnapshotIdError";
-}
-
-export interface GetSnapshotsOptions extends BaseOptions {
-  /** 次のsnapshots listを示すID */
-  followingId?: string;
-}
-
-/** get page snapshots
- *
- * @param options connect.sid etc.
- */
-export const getSnapshots = async (
-  project: string,
-  pageId: string,
-  options?: GetSnapshotsOptions,
-): Promise<
-  Result<
-    (PageSnapshot & { followingId: string }),
-    | NotFoundError
-    | NotLoggedInError
-    | NotMemberError
-    | InvalidPageSnapshotIdError
-  >
-> => {
-  const { sid, hostName, fetch, followingId } = setDefaults(options ?? {});
-
-  const req = new Request(
-    `https://${hostName}/api/page-snapshots/${project}/${pageId}/${
-      followingId ? `?followingId=${followingId}` : ""
-    }`,
-    sid ? { headers: { Cookie: cookie(sid) } } : undefined,
-  );
-
-  const res = await fetch(req);
-
-  if (!res.ok) {
-    if (res.status === 422) {
-      return {
-        ok: false,
-        value: {
-          name: "InvalidPageSnapshotIdError",
-          message: await res.text(),
-        },
-      };
-    }
-    return makeError<NotFoundError | NotLoggedInError | NotMemberError>(res);
-  }
-
-  const data = (await res.json()) as PageSnapshot;
-  return {
-    ok: true,
-    value: { ...data, followingId: res.headers.get("X-following-id") ?? "" },
-  };
-};
-
-/** 指定したページのsnapshotsを、responseに入っている塊ごとに全て返す
- *
- * @param project ページのproject name
- * @param pageId page id
- * @return 認証が通らなかったらエラーを、通ったらasync generatorを返す
- */
-export const readSnapshotsBulk = async (
-  project: string,
-  pageId: string,
-  options?: BaseOptions,
-): Promise<
-  | NotFoundError
-  | NotLoggedInError
-  | NotMemberError
-  | InvalidPageSnapshotIdError
-  | AsyncGenerator<Snapshot[], void, unknown>
-> => {
-  const first = await getSnapshots(project, pageId, options);
-  if (!first.ok) return first.value;
-
-  return async function* () {
-    yield first.value.snapshots;
-    let followingId = first.value.followingId;
-
-    while (followingId) {
-      const result = await getSnapshots(project, pageId, {
-        followingId,
-        ...options,
-      });
-
-      // すでに認証は通っているので、ここでエラーになるはずがない
-      if (!result.ok) {
-        throw new Error("The authorization cannot be unavailable");
-      }
-      yield result.value.snapshots;
-      followingId = result.value.followingId;
-    }
-  }();
-};
-
-/** 指定したページの全てのsnapshotsを取得し、一つづつ返す
- *
- * @param project ページのproject name
- * @param pageId page id
- * @return 認証が通らなかったらエラーを、通ったらasync generatorを返す
- */
-export const readSnapshots = async (
-  project: string,
-  pageId: string,
-  options?: BaseOptions,
-): Promise<
-  | NotFoundError
-  | NotLoggedInError
-  | NotMemberError
-  | InvalidPageSnapshotIdError
-  | AsyncGenerator<Snapshot, void, unknown>
-> => {
-  const reader = await readSnapshotsBulk(project, pageId, options);
-  if ("name" in reader) return reader;
-
-  return async function* () {
-    for await (const titles of reader) {
-      for (const title of titles) {
-        yield title;
-      }
-    }
-  }();
-};
diff --git a/rest/mod.ts b/rest/mod.ts
index 916fa9a..849fefe 100644
--- a/rest/mod.ts
+++ b/rest/mod.ts
@@ -4,7 +4,7 @@ export * from "./project.ts";
 export * from "./profile.ts";
 export * from "./replaceLinks.ts";
 export * from "./page-data.ts";
-export * from "./getSnapshots.ts";
+export * from "./snapshot.ts";
 export * from "./link.ts";
 export * from "./search.ts";
 export * from "./getWebPageTitle.ts";
diff --git a/rest/snapshot.ts b/rest/snapshot.ts
new file mode 100644
index 0000000..85d9973
--- /dev/null
+++ b/rest/snapshot.ts
@@ -0,0 +1,93 @@
+import type {
+  ErrorLike,
+  NotFoundError,
+  NotLoggedInError,
+  NotMemberError,
+  PageSnapshotList,
+  PageSnapshotResult,
+} from "../deps/scrapbox-rest.ts";
+import { cookie } from "./auth.ts";
+import { BaseOptions, Result, setDefaults } from "./util.ts";
+import { makeError } from "./error.ts";
+
+/** 不正な`timestampId`を渡されたときに発生するエラー */
+export interface InvalidPageSnapshotIdError extends ErrorLike {
+  name: "InvalidPageSnapshotIdError";
+}
+
+/** get a page snapshot
+ *
+ * @param options connect.sid etc.
+ */
+export const getSnapshot = async (
+  project: string,
+  pageId: string,
+  timestampId: string,
+  options?: BaseOptions,
+): Promise<
+  Result<
+    PageSnapshotResult,
+    | NotFoundError
+    | NotLoggedInError
+    | NotMemberError
+    | InvalidPageSnapshotIdError
+  >
+> => {
+  const { sid, hostName, fetch } = setDefaults(options ?? {});
+
+  const req = new Request(
+    `https://${hostName}/api/page-snapshots/${project}/${pageId}/${timestampId}`,
+    sid ? { headers: { Cookie: cookie(sid) } } : undefined,
+  );
+
+  const res = await fetch(req);
+
+  if (!res.ok) {
+    if (res.status === 422) {
+      return {
+        ok: false,
+        value: {
+          name: "InvalidPageSnapshotIdError",
+          message: await res.text(),
+        },
+      };
+    }
+    return makeError<NotFoundError | NotLoggedInError | NotMemberError>(res);
+  }
+
+  const value = (await res.json()) as PageSnapshotResult;
+  return { ok: true, value };
+};
+
+/**
+ * Retrieves the timestamp IDs for a specific page in a project.
+ *
+ * @param project - The name of the project.
+ * @param pageId - The ID of the page.
+ * @param options - Optional configuration options.
+ * @returns A promise that resolves to a {@link Result} object containing the page snapshot list if successful,
+ * or an error if the request fails.
+ */
+export const getTimestampIds = async (
+  project: string,
+  pageId: string,
+  options?: BaseOptions,
+): Promise<
+  Result<PageSnapshotList, NotFoundError | NotLoggedInError | NotMemberError>
+> => {
+  const { sid, hostName, fetch } = setDefaults(options ?? {});
+
+  const req = new Request(
+    `https://${hostName}/api/page-snapshots/${project}/${pageId}`,
+    sid ? { headers: { Cookie: cookie(sid) } } : undefined,
+  );
+
+  const res = await fetch(req);
+
+  if (!res.ok) {
+    return makeError<NotFoundError | NotLoggedInError | NotMemberError>(res);
+  }
+
+  const value = (await res.json()) as PageSnapshotList;
+  return { ok: true, value };
+};