Connect to any remote Model Context Protocol server from your browser. Explore tools, prompts, and resources — then debug with real-time JSON-RPC logs. Browse 10,000+ servers including Supabase, Playwright, Figma, GitHub, and more.
Free MCP playground for developers. Test MCP server tools, validate protocol implementations, and browse tutorials — all from one place, no credit card needed.
The fastest way to build, test, eval, and ship MCP-powered AI agents — all in your browser.
✦ Free credits on sign-up · no credit card needed
Claude Sonnet 4.5
list_issues()GPT-5.4 nano
list_issues()[ USE CASES ]
Auto-generate a test suite from your own tools, then prove an AI agent can answer with them. Code decides pass/fail — a failure is a real defect.
Learn more →Run one prompt across up to 4 models simultaneously. Fastest, cheapest, and best-accuracy winners computed automatically.
Learn more →GitHub, Stripe, Linear, Slack and more — pre-wired with the right model and system prompt.
Learn more →Browse the full registry and add any server with one click. HTTP, SSE, or local CLI (stdio, npx/uvx with env vars) all supported.
Learn more →Full request/response JSON for every tool call with per-call latency. Debug anything instantly.
Learn more →Snapshot your servers, model, and system prompt as a named agent. Load it back in one click.
Learn more →What you can do
Get started instantly. Test your MCP implementation by hand, or hand it to an AI model and watch it work.
Connect to any remote server and explore its capabilities
Test Remote Servers
Enter any MCP server URL and connect instantly
Browse Tools & Resources
Explore available tools, prompts, and resources
Execute & Debug
Call tools, get prompts, and read resources
Full Request/Response Logs
See all MCP protocol interactions in real-time
Why MCP Playground
Instant Testing
No setup, no install. Test in seconds.
Works with Any Server
Test any remote MCP implementation.
Full Protocol Support
Tools, prompts, resources — all supported.
Real-time Logging
See every request and response live.
Ready to get started? Completely free.
Next step
Protocol tests catch protocol bugs. They cannot catch a tool description a model misreads, or two tools it cannot tell apart. Connect the same server in MCP Agent Studio and watch a real model try.
Overview
MCP Playground is a free, browser-based testing tool for the Model Context Protocol (MCP). Test MCP servers, clients, and tools directly in your browser without any installation or configuration.
Supports all core MCP features including tools, prompts, and resources. Connect to any remote server, browse capabilities, execute commands, and view real-time request/response logs.
Benefits
Traditional MCP testing requires local setup, dependencies, and configuration. MCP Playground eliminates all of this — just enter a server URL and start testing.
Perfect for validating server implementations, testing tools before deployment, or exploring the MCP servers list. Works with any standard MCP server that supports remote connections.
Features
Browser-Based
No software to install
Remote Servers
Connect via URL
Full Protocol
Tools, prompts, resources
Real-Time Logs
Live request/response
10000+ Servers
Official MCP Registry
Free & Open
No limits, no sign-up
Guide
Navigate to the MCP server testing page
Enter your MCP server URL (add auth token if needed)
Click Connect to establish a connection
Browse tools, execute commands, view logs
AI Agents
A server that responds correctly can still be unusable by an agent — an ambiguous tool description or an under-specified schema only fails when a real model tries to call it. MCP Agent Studio connects your server to 60+ models — Claude, GPT-5, Gemini, DeepSeek, Grok, Qwen — and shows every tool call with its full JSON input and output.
Run the same prompt across up to four models at once to see which picks the right tool, or start from a pre-built agent template for GitHub, Stripe, Notion, Linear and more.
Evals
An MCP eval answers a different question than a tester does: not “did the server respond?” but “can an agent actually accomplish something with it?” The suite is generated from your real tool schemas, so it tests exactly what a model would see.
Direct checks — output-schema conformance, JSON-RPC error codes, pagination, idempotency — are decided by code, not by a model. Agentic tasks are driven by one model and graded by another. You get a pass/fail report per tool, with evidence, that you can re-run after every change.
Ready to test? Start testing MCP servers, run your server against an AI model, explore the server registry, or validate your client. The testing tools are free with no registration; Agent Studio gives you free credits on sign-up.