How do I connect MCP Chaos Rig MCP Server to Claude?

Run `claude mcp add mcp-chaos-rig -- npx -y mcp-chaos-rig` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.

Is MCP Chaos Rig MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can MCP Chaos Rig MCP Server do?

MCP Chaos Rig MCP Server documents 8 tools to the agent, including add, dispute-charge, echo. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

MCP Chaos Rig

Unclaimed

by Typewise

A local MCP server that breaks on demand. Test your client against auth failures, disappearing tools, flaky responses, and token expiry, all from a web UI.

Set up this server

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01 / Choose your client

02 / Before you connect

Authentication is not specified. Check the project instructions before connecting.

Install the runtime required by the project and make it available to your client.

Project instructionsEnvironment variable names (optional)

Use names from the project instructions, separated by commas. Enter names only, never secret values.

03 / Add the configuration

Source: generated from public install instructions

claude mcp add --transport stdio 'mcp-chaos-rig' -- 'npx' '-y' 'mcp-chaos-rig'

Run in your terminal after replacing any placeholders.

04 / Check it in your client

Open your client’s MCP settings and confirm the server connects and lists its tools. A copied configuration does not confirm a working connection.

chaosdebuggingmcpmockservermcp-server

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Security profile

Claimed and verified servers get a weekly static scan that shows what the code can reach: external services, environment variables, shell commands, agent configuration folders, plus any dependencies with known advisories. Claim this listing to get one. How the security profile works

8 of 8 tools

Documented tools (8)

From project documentation. A server handshake does not verify each tool’s description or behavior.

add

sums two numbers (v2 accepts an array)

dispute-charge

files a billing dispute, returns a JSON receipt

echo

returns your message (v2 adds format options)

get-time

current server time as ISO 8601

list-contacts

, get-contact-by-id, get-contact-by-email, search-contacts, create-contact, update-contact, delete-contact: SQLite CRUD

random-number

random integer in a range

reverse

reverses a string

typeEcho

echoes one optional parameter per JSON Schema primitive, to check a client round-trips every type

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about MCP Chaos Rig MCP Server

How do I connect MCP Chaos Rig MCP Server to Claude?: Run `claude mcp add mcp-chaos-rig -- npx -y mcp-chaos-rig` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.
Is MCP Chaos Rig MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can MCP Chaos Rig MCP Server do?: MCP Chaos Rig MCP Server documents 8 tools to the agent, including add, dispute-charge, echo. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.