diff --git a/.changeset/fix-prettier-dynamic-import.md b/.changeset/fix-prettier-dynamic-import.md
new file mode 100644
index 00000000..5bef7a4b
--- /dev/null
+++ b/.changeset/fix-prettier-dynamic-import.md
@@ -0,0 +1,6 @@
+---
+"@adobe/spectrum-tokens": patch
+---
+
+Use dynamic import for prettier in writeJson so the package loads without prettier
+when used outside the monorepo (e.g. spectrum-design-data-mcp via npx).
diff --git a/packages/tokens/index.js b/packages/tokens/index.js
index 51ce111a..fe9ce8c2 100644
--- a/packages/tokens/index.js
+++ b/packages/tokens/index.js
@@ -16,7 +16,6 @@ import { basename, resolve } from "path";
 import { readFile } from "fs/promises";
 import * as url from "url";
 import { writeFile } from "fs/promises";
-import { format } from "prettier";
 
 export const __dirname = url.fileURLToPath(new URL(".", import.meta.url));
 
@@ -28,6 +27,7 @@ export const readJson = async (fileName) =>
   JSON.parse(await readFile(fileName, "utf8"));
 
 export const writeJson = async (fileName, jsonData) => {
+  const { format } = await import("prettier");
   await writeFile(
     fileName,
     await format(JSON.stringify(jsonData), { parser: "json-stringify" }),