MCP Testing Tools · Free · No Install
Test MCP Servers Online — Free, No Setup
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.
Test MCP ServerTest MCP with AITest MCP ClientConfig Generator
HTTP + SSE supportReal-time debug logs30+ AI models
[ MCP AGENT STUDIO ]NEW · FREE CREDITS
Build agents for
One prompt, four models, side-by-side. Pick from pre-built agent templates or wire up any MCP server — remote or local CLI — in seconds.
✦ Free credits on sign-up · no credit card needed
Compare · “Show top 5 open issues”
Pick winner →
[ USE CASES ]
Agent Templates
GitHub, Stripe, Linear, Slack and more — pre-wired with the right model and system prompt.
Learn more →Compare Models
Run one prompt across up to 4 models simultaneously. Fastest, cheapest, and best-accuracy winners computed automatically.
Learn more →10,000+ MCP Servers
Browse the full registry and add any server with one click. HTTP, SSE, or local CLI (stdio) all supported.
Learn more →Live JSON Inspector
Full request/response JSON for every tool call with per-call latency. Debug anything instantly.
Learn more →Save & Reuse Agents
Snapshot your servers, model, and system prompt as a named agent. Load it back in one click.
Learn more →Stdio / CLI Servers
Run local MCP tools (npx, uvx) alongside remote HTTP servers. Inject env vars for auth without leaving the UI.
Learn more →Compare Mode
Find the right model for your tools — in one run
Send the same prompt to up to 4 models simultaneously. Watch live tool calls, compare outputs, and let automatic winner ribbons tell you which model is fastest, cheapest, and most accurate.
Try Compare Mode
01
Write one prompt
Type the question you want answered using your MCP tools.
02
Pick 2–4 models
Select any combination from 30+ models. Cost estimated upfront.
03
See results live
Streams in parallel. Winner ribbons computed as runs complete.
Best accuracy — highest successful tool-call ratio, fewest redundant calls
Fastest — lowest total wall time from prompt to complete response
Best value — composite of accuracy, speed, and credit cost
No credit card · free credits on sign-up · up to 4 models at once
What you can do
Test Any Remote MCP Server or Client
Get started instantly. No sign-up required. Test your MCP implementation in seconds.
Test MCP Server in Browser
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.
Overview
What is MCP Playground?
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
Why Use It for Testing?
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
Key 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
How to Test MCP Servers
1
Navigate to the MCP server testing page
2
Enter your MCP server URL (add auth token if needed)
3
Click Connect to establish a connection
4
Browse tools, execute commands, view logs
Ready to test? Start testing MCP servers, explore the server registry, or validate your client. features remain free — no registration required.