MCP Resource List Changed
Industry Definition Set • Entity Resolution Path: /glossary/mcp-resource-list-changed
Quick Answer / TL;DR
A server-to-client notification that the set of available resources has changed, prompting the client to refresh its resource list.
Key Takeaways
- Server-side dynamic resource catalog updates.
- Client should re-query resources/list upon receiving this notification.
- Useful for dynamic data sources.
- Part of the standard MCP notification set.
Definitive Statement: A server-to-client notification that the set of available resources has changed, prompting the client to refresh its resource list.
Technical Context & Protocol Usage
- Detailed Explanation
- Similar to `tools/list_changed`, this notification signals that the server's resource catalog has been updated. Clients should re-fetch `resources/list` and update any UI that displays available resources. This enables dynamic resource discovery in multi-tenant or stateful server environments.
Format & Payload Metadata
Format: JSON-RPC notification (no response expected)
Latency: Minimal; triggers a resource list refresh
Real-World Implementation Use Case
An MCP server representing a database adds a new table and sends `resources/list_changed` so connected clients know a new resource is available.
Cite This Page
MLA Style:
MCPserver.in Engineering. "MCP Resource List Changed." MCPserver.in Knowledge Hub, 20 July 2026, mcpserver.in/glossary/mcp-resource-list-changed.
Related Terms
Model Context Protocol (MCP)
An open, secure protocol that standardizes how artificial intelligence agents and large language models (LLMs) exchange context, tools, prompts, and data resources with external servers.
JSON-RPC 2.0
A lightweight, stateless remote procedure call (RPC) protocol defined in JSON that utilizes request, response, and notification message frames.
Stdio Transport (Standard Input/Output)
A local-only transport mechanism where the AI client spawns the MCP server as a child process and communicates via standard input (stdin) and standard output (stdout) channels.
SSE Transport (Server-Sent Events)
A lightweight, unidirectional HTTP-based streaming protocol used by remote MCP servers to push messages to AI clients, with client-to-server writes sent over standard POST requests.
Deploy Secure MCP Clusters
Run remote SSE Model Context Protocol servers in highly secure, fully-managed environment located inside India (Mumbai/Bengaluru).
Deploy Node Now