From 0bcd69cd98a9d3c8ad6807999e5072b4b2707b83 Mon Sep 17 00:00:00 2001
From: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
Date: Tue, 9 Dec 2025 20:40:00 -0500
Subject: [PATCH] Remove overly restrictive MIME type validation from Resource
 (#2585)

---
 src/fastmcp/resources/resource.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/fastmcp/resources/resource.py b/src/fastmcp/resources/resource.py
index 6bb4dbd47..b6fbc9061 100644
--- a/src/fastmcp/resources/resource.py
+++ b/src/fastmcp/resources/resource.py
@@ -42,7 +42,6 @@ class Resource(FastMCPComponent):
     mime_type: str = Field(
         default="text/plain",
         description="MIME type of the resource content",
-        pattern=r"^[a-zA-Z0-9]+/[a-zA-Z0-9\-+.]+$",
     )
     annotations: Annotated[
         Annotations | None,