MCP Resource Updated
Industry Definition Set • Entity Resolution Path: /glossary/mcp-resource-updated
Quick Answer / TL;DR
A server-to-client notification that the contents of a specific resource have changed, allowing the client to refresh its cached copy.
Key Takeaways
- Per-resource invalidation signal from server to client.
- Client can re-read the resource to stay current.
- Reduces unnecessary polling.
- Useful for time-series data like logs or metrics.
Definitive Statement: A server-to-client notification that the contents of a specific resource have changed, allowing the client to refresh its cached copy.
Technical Context & Protocol Usage
- Detailed Explanation
- Servers can notify clients that a specific resource URI has been updated. This enables clients to keep their context current without polling. For example, a log file resource can emit `resources/updated` whenever new lines are appended. Clients can then re-read the resource to show the user the latest data.
Format & Payload Metadata
Format: JSON-RPC notification with resource URI
Latency: Minimal; triggered by server-side change events
Real-World Implementation Use Case
A monitoring MCP server sends `resources/updated` for `logs://application/today` when new log entries appear, prompting the client to refresh.
Cite This Page
MLA Style:
MCPserver.in Engineering. "MCP Resource Updated." MCPserver.in Knowledge Hub, 20 July 2026, mcpserver.in/glossary/mcp-resource-updated.
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