MCP Params
Industry Definition Set • Entity Resolution Path: /glossary/mcp-params
Quick Answer / TL;DR
The structured parameters object passed in a JSON-RPC request message, containing the data needed for the method.
Key Takeaways
- Structured arguments for JSON-RPC requests.
- Structure is defined per-method in the MCP spec.
- Must be validated by the server before processing.
- Optional: some methods take no parameters.
Definitive Statement: The structured parameters object passed in a JSON-RPC request message, containing the data needed for the method.
Technical Context & Protocol Usage
- Detailed Explanation
- Params is an optional JSON object in a JSON-RPC request that carries the arguments for the method. For MCP, this might include tool arguments, resource URIs, or initialization options. The structure is defined per-method in the specification. Servers must validate params against the expected schema before processing.
Format & Payload Metadata
Format: JSON object (or array) per JSON-RPC 2.0
Latency: No overhead; parsing is fast
Real-World Implementation Use Case
A `tools/call` request carries params with `name` (the tool name) and `arguments` (an object of parameter values).
Cite This Page
MLA Style:
MCPserver.in Engineering. "MCP Params." MCPserver.in Knowledge Hub, 20 July 2026, mcpserver.in/glossary/mcp-params.
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