From 609cdc709b1bf54fbced7a2cb0c8b538f4f38393 Mon Sep 17 00:00:00 2001
From: Carl Peaslee <carl@loopwork.com>
Date: Fri, 30 May 2025 12:35:34 -0700
Subject: [PATCH] Add `Client.listResourceTemplates` method (#125)

* adds listResourceTemplates to client for #124

* add pagination to resources/templates/list

from @mattt

Co-authored-by: Mattt <mattt@loopwork.com>

* adds cursor functionality to ListResourceTemplates

* updates the client method to use the updated signature

---------

Co-authored-by: Mattt <mattt@loopwork.com>
---
 Sources/MCP/Client/Client.swift    | 14 ++++++++++++++
 Sources/MCP/Server/Resources.swift | 17 +++++++++++++++--
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/Sources/MCP/Client/Client.swift b/Sources/MCP/Client/Client.swift
index 6031835..53d11fd 100644
--- a/Sources/MCP/Client/Client.swift
+++ b/Sources/MCP/Client/Client.swift
@@ -578,6 +578,20 @@ public actor Client {
         _ = try await send(request)
     }
 
+    public func listResourceTemplates(cursor: String? = nil) async throws -> (
+        templates: [Resource.Template], nextCursor: String?
+    ) {
+        try validateServerCapability(\.resources, "Resources")
+        let request: Request<ListResourceTemplates>
+        if let cursor = cursor {
+            request = ListResourceTemplates.request(.init(cursor: cursor))
+        } else {
+            request = ListResourceTemplates.request(.init())
+        }
+        let result = try await send(request)
+        return (templates: result.templates, nextCursor: result.nextCursor)
+    }
+
     // MARK: - Tools
 
     public func listTools(cursor: String? = nil) async throws -> (
diff --git a/Sources/MCP/Server/Resources.swift b/Sources/MCP/Server/Resources.swift
index 311ff09..12f6733 100644
--- a/Sources/MCP/Server/Resources.swift
+++ b/Sources/MCP/Server/Resources.swift
@@ -149,17 +149,30 @@ public enum ReadResource: Method {
 public enum ListResourceTemplates: Method {
     public static let name: String = "resources/templates/list"
 
-    public typealias Parameters = Empty
+    public struct Parameters: NotRequired, Hashable, Codable, Sendable {
+        public let cursor: String?
+
+        public init() {
+            self.cursor = nil
+        }
+        
+        public init(cursor: String) {
+            self.cursor = cursor
+        }
+    }
 
     public struct Result: Hashable, Codable, Sendable {
         public let templates: [Resource.Template]
+        public let nextCursor: String?
 
-        public init(templates: [Resource.Template]) {
+        public init(templates: [Resource.Template], nextCursor: String? = nil) {
             self.templates = templates
+            self.nextCursor = nextCursor
         }
 
         private enum CodingKeys: String, CodingKey {
             case templates = "resourceTemplates"
+            case nextCursor
         }
     }
 }