Free MCP Developer Tools

Configure, validate, and scaffold MCP servers with powerful browser-based tools. No signup required. Your data never leaves your machine.

Available Tools

Most Popular
MCP Config Generator
Visual configuration wizard for Claude Desktop, Cursor, VS Code, Windsurf, and Claude Code. Generate valid MCP config files in seconds.
Multi-Client
Server Picker
Import & Merge
Shareable Links
Launch Tool
New
MCP Schema Validator
Real-time validation of MCP tool definitions, resource schemas, and prompt templates against the official specification.
Spec Compliance
Security Scanner
Auto-Fix
Multi-Mode
Launch Tool
New
MCP Server Generator
Scaffold complete MCP server projects in TypeScript, Python, Go, or Rust with deployment configs and test scaffolding.
4 Languages
Templates
Docker/Cloud Deploy
ZIP Download
Launch Tool

Coming Soon

More tools are on the way. Here is a preview of what we are building next.

Coming Soon
OpenAPI to MCP Converter
Convert existing REST API OpenAPI/Swagger specs into fully functional MCP servers.
Coming Soon
MCP Security Scanner
Audit MCP server configs and source code for vulnerabilities and security best practices.
Coming Soon
MCP Playground
Browser-based playground to test MCP server interactions without any local installation.
Coming Soon
Compatibility Checker
Check which MCP servers work with Claude Desktop, Cursor, VS Code, and other clients.
Coming Soon
Server Comparison Tool
Compare MCP servers side-by-side on features, performance, security, and compatibility.
Coming Soon
Stack Builder
Build and share your ideal MCP server stack with visual drag-and-drop configuration.
Coming Soon
Prompt Optimizer
Generate optimized MCP prompt templates and resource schemas for your use case.
Coming Soon
Ecosystem Graph
Interactive visualization of the MCP ecosystem showing server, client, and category relationships.
Coming Soon
Cost Calculator
Estimate infrastructure and API costs for running MCP servers at any scale.

Why Developers Need MCP Tools

The Model Context Protocol (MCP) is transforming how AI applications connect to external tools and data sources. As the ecosystem has grown to over 17,000 servers by early 2026, developers face a growing challenge: the protocol is powerful but the tooling around it is fragmented. Setting up MCP servers requires manually editing JSON configuration files, validating against an evolving specification, and bootstrapping boilerplate code from scratch.

MCPServerSpot's developer tools solve these problems by providing free, browser-based utilities that handle the tedious parts of MCP development. Every tool runs entirely client-side — your API keys, configuration files, and source code never leave your browser. There is no signup, no freemium wall, and no usage limit.

Whether you are configuring your first MCP server in Claude Desktop, validating a complex tool schema before publishing, or scaffolding a production-ready server project in TypeScript or Python, these tools save hours of manual work and eliminate the most common sources of errors.

How MCP Configuration Works

Every MCP client — Claude Desktop, Cursor, VS Code, Windsurf, and Claude Code — uses a JSON configuration file to define which MCP servers to connect to. Each server entry specifies a command to run (like npx or uvx), arguments to pass, and optional environment variables for API keys and credentials.

The challenge is that each client uses a slightly different file format and location. Claude Desktop stores its config in ~/Library/Application Support/Claude/claude_desktop_config.json on macOS, while Cursor uses ~/.cursor/mcp.json, and VS Code embeds MCP settings within its settings.json. A single misplaced comma or wrong key name breaks the entire configuration.

Our Config Generator eliminates this friction by providing a visual interface where you select your client, pick servers from our directory, configure environment variables, and export a valid configuration file. It even lets you import your existing config to merge new servers without breaking what already works.

The MCP Specification and Validation

MCP servers expose their capabilities through structured JSON definitions: tools define callable functions with typed input schemas, resources provide access to data through URI-based addressing, and prompts offer templated interaction patterns. All of these must conform to the official MCP specification to work correctly across different clients.

Common validation issues include missing required fields in tool definitions, invalid parameter types in input schemas, malformed resource URIs, and security vulnerabilities like overly broad file system access patterns or potential command injection vectors. Our Schema Validator catches these issues instantly with human-readable error messages and one-click auto-fix suggestions.

Beyond specification compliance, the validator includes a security scanner that flags dangerous patterns like hardcoded credentials, shell command injection risks, and unrestricted file system access. This helps developers build secure MCP servers from day one rather than discovering vulnerabilities after deployment.

Building MCP Servers from Scratch

Creating an MCP server involves significant boilerplate: project setup, dependency management, transport configuration, tool and resource definitions, error handling, testing scaffolding, deployment configuration, and documentation. The official MCP SDKs for TypeScript and Python provide the protocol implementation, but developers still need to set up everything around it.

Our Server Generator handles all of this automatically. Choose your language (TypeScript, Python, Go, or Rust), select the MCP capabilities you need (tools, resources, prompts), pick from pre-built tool templates (database queries, API wrappers, file system access), configure your deployment target (Docker, Cloudflare Workers, AWS Lambda), and download a complete, ready-to-run project as a ZIP file.

Every generated project includes production-ready code: proper error handling, environment variable management, a Docker configuration, GitHub Actions CI/CD pipeline, comprehensive README documentation, and test scaffolding. The generated code follows each language's MCP SDK best practices and is designed to be extended, not thrown away.

The MCP Ecosystem in 2026

The MCP ecosystem has experienced explosive growth since Anthropic open-sourced the protocol in late 2024. By early 2026, there are over 17,000 MCP servers covering every category imaginable: version control (GitHub, GitLab), databases (PostgreSQL, MongoDB, Redis), cloud providers (AWS, GCP, Azure), productivity tools (Slack, Notion, Gmail), web automation (Playwright, Puppeteer), and specialized AI tools (vector databases, RAG pipelines, code analysis).

The major AI coding tools — Claude Desktop, Cursor, VS Code with Copilot, Windsurf, and Claude Code — all support MCP, making it the de facto standard for AI-tool integration. Enterprise adoption is accelerating as organizations recognize that MCP provides a standardized, auditable way to give AI assistants controlled access to internal systems.

MCPServerSpot serves as the comprehensive hub for this ecosystem: a curated directory of MCP servers, an extensive learning center with guides and tutorials, and now a suite of developer tools that make working with MCP faster and more reliable.

Client-Side Privacy Guarantee

All MCPServerSpot tools run 100% in your web browser using client-side JavaScript. Nothing is sent to any server. Your configuration files, API keys, environment variables, source code, and validation results stay entirely on your machine.

This is a deliberate architectural decision, not just a convenience. Developers work with sensitive credentials and proprietary configurations. We believe developer tools should respect this by default. You can verify our client-side architecture by checking your browser's Network tab while using any tool — you will see zero outbound requests to our servers.

The only exception is the Server Picker feature in the Config Generator, which loads the publicly available MCP server directory data to help you find and add servers to your configuration. This is the same data visible on our public servers page.

Frequently Asked Questions

Browse the MCP Server Directory

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