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Readme

MCP Test Servers

A collection of test servers implementing the Model Context Protocol (MCP).

npx -y @msfeldstein/mcp-test-servers <server>

Available Servers

all-types: Demonstrates various tool parameter types supported by MCP
bad-param: Server with an intentionally malformed parameter name
big-response: Server that returns large responses
broken-tool: Server with intentionally broken tool
crash-on-startup: Server that crashes on startup
combined: Server with tools and resources
duplicate-names: Server with duplicate names for resources
enum-param: Tool has enum string parameter
env-check: Checks for SHOULD_RUN environment variable being passed properly
env-echo: Echoes the environment variables
image: Tool returns an image of sonic the hedgehog
long-description: Publicize a very long description configured via env var
many-resources: Server with multiple resources
many-tools: Server with 100 tools that each return 'ack'
math: Server with basic math function tools (add, subtract, multiply, divide, power, sqrt, factorial)
named: Server with configurable name via MCP_SERVER_NAME environment variable
number-param: Tool with a number parameter
optional-param: Tool has an optional param
pattern-param: Tool has a parameter with a pattern match
ping: A simple server that responds with 'pong'
resource: Resource server implementation
roots-echo: Server that demonstrates MCP roots functionality by echoing back the roots provided by the client
stderr: Server that logs to stderr
stdout Servert that illegally logs to stdout

Remote Servers

# Streamable HTTP
npm run http-ping

# SSE
npm run sse-ping