Mcp Load Test
MCP load testing - load test active MCP connections
Install
$ agentstack add mcp-hasmcp-mcp-load-test ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo 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.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/mcp-hasmcp-mcp-load-test) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →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 buildUsage
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=1000Configuration 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.
- Author: hasmcp
- Source: hasmcp/mcp-load-test
- License: Apache-2.0
- Homepage: https://hasmcp.com
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.