MCP Playground Online is a free, browser-based tool for developers and AI engineers to test, debug, and audit Model Context Protocol (MCP) servers - no installation required.
Connect any remote MCP server in seconds and instantly browse its tools, resources, and prompts. Execute tool calls with custom parameters and inspect live responses — making it the fastest way to validate an MCP integration before shipping to production.
Key features:
- MCP Server Tester — Connect any remote MCP server and run tool calls directly from your browser
- MCP Client Tester — Test and debug MCP client connections against live servers
- MCP Security Scanner — 27+ automated checks across authentication, transport security, injection risks, CORS, and rate
limiting. Identifies exposed servers, missing auth, and misconfigured headers
- MCP Server Registry — Searchable directory of 10,000+ MCP servers across databases, dev tools, productivity, and cloud
services
- Prompt Library — Curated prompts for working with MCP tools and AI agents
- Developer Blog — 65+ in-depth guides on MCP development, security, authentication, and automation workflows
Used by AI engineers, DevOps teams, and developers building with Anthropic Claude, Cursor, Windsurf, VS Code, and other MCP-compatible clients. As of 2026, over 8,000 MCP servers are publicly exposed with no authentication — MCP Playground's security scanner helps developers find and fix these issues before they become incidents.
Free to use. No sign-up required.
