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MCP verified Apache-2.0 Self-run

Mcp Load Test

mcp-hasmcp-mcp-load-test · by hasmcp

MCP load testing - load test active MCP connections

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Install

$ agentstack add mcp-hasmcp-mcp-load-test

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

MCP Load Tester

A lightweight load testing tool for Model Context Protocol (MCP) servers using streamable client transport.

This tool is designed to establish multiple concurrent MCP client sessions against a target MCP endpoint, ramp up connections in batches, display a live progress bar, and maintain the sessions until interrupted.

Features

  • Concurrent Client Simulation: Simulates up to thousands of concurrent MCP client sessions.
  • Ramped Connection Pool: Establishes connections in batches of 100 per second to prevent overwhelming the target server during startup.
  • Live Progress Visualization: Displays progress as sessions initialize using a visual progress bar.
  • Graceful Shutdown: Intercepts interruption signals (Ctrl+C) and gracefully shuts down all established sessions.
  • Customizable Targets: Fully configurable target URL and client count via command-line flags.

Installation

Ensure you have Go installed on your system.

Clone the repository and build or run the project directly:

cd mcp-load-test
go build

Usage

To run the load tester, you must provide the -url flag. You can also optionally customize the load with -clients (which defaults to 20,000 clients):

go run main.go -url="https://your-mcp-server.com/mcp"

With Custom Client Count

go run main.go -url="https://your-mcp-server.com/mcp" -clients=1000

Configuration Flags

| Flag | Type | Description | Default | | :--- | :--- | :--- | :--- | | -url | string | The target URL of the MCP server endpoint. | Required (No default) | | -clients | int | The total number of concurrent MCP clients to spin up. | 20000 |

Graceful Termination

Once all sessions are established, the program stays active keeping the connections alive. To stop the load test and gracefully close all client sessions, press Ctrl+C.

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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