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by r-huijts • Testing & QA
A configuration-driven tool to automatically generate, run, validate, and report tests for MCP (Model Context Protocol) servers.
Automatically discover and validate all tools exposed by an MCP server to ensure protocol compliance.
Generate realistic, diverse test cases (happy path, edge, and error cases) using Claude to better exercise tool behaviour.
Repeatable regression testing and CI-friendly reports (JSON/HTML/Markdown) to catch regressions and performance issues.
MCP Server Tester discovers tools exposed by an MCP server, uses Claude (Anthropic) to generate realistic test cases, executes those tests against the server, and validates responses against configurable rules. It produces detailed reports (console, JSON, HTML, Markdown) and is designed for regression testing and CI integration. The project is open-source and currently under active development (alpha/work-in-progress).
Read the complete contents of a file as text. DEPRECATED: Use read_text_file instead.
Read the complete contents of a file from the file system as text. Handles various text encodings and provides detailed error messages if the file cannot be read. Use this tool when you need to examine the contents of a single file. Use the 'head' parameter to read only the first N lines of a file, or the 'tail' parameter to read only the last N lines of a file. Operates on the file as text regardless of extension. Only works within allowed directories.
Read an image or audio file. Returns the base64 encoded data and MIME type. Only works within allowed directories.
Read the contents of multiple files simultaneously. This is more efficient than reading files one by one when you need to analyze or compare multiple files. Each file's content is returned with its path as a reference. Failed reads for individual files won't stop the entire operation. Only works within allowed directories.
Create a new file or completely overwrite an existing file with new content. Use with caution as it will overwrite existing files without warning. Handles text content with proper encoding. Only works within allowed directories.
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