mcpplaygroundonline.com valid

Automatically discovered from public files. Ownership management is optional. Inclusion does not imply endorsement or publisher participation.

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Claim my listing on Agent Web Map for mcpplaygroundonline.com:
1. POST https://agentwebmap.com/v1/sites/mcpplaygroundonline.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://mcpplaygroundonline.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/mcpplaygroundonline.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/mcpplaygroundonline.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory. Ownership management is optional.

MCP Playground

Free browser-based tool for testing MCP (Model Context Protocol) servers and clients. Build AI agents that connect to any MCP server with 60+ models (Claude, GPT-5, Gemini, DeepSeek, Grok, Qwen). Includes a security scanner, prompt library, MCP server registry, agent templates, and 65+ developer guides.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T12:09:46.091Z. Cached copy · Source on mcpplaygroundonline.com

# MCP Playground

> Free browser-based tool for testing MCP (Model Context Protocol) servers and clients. Build AI agents that connect to any MCP server with 60+ models (Claude, GPT-5, Gemini, DeepSeek, Grok, Qwen). Includes a security scanner, prompt library, MCP server registry, agent templates, and 65+ developer guides.

MCP Playground (mcpplaygroundonline.com) is the go-to tool for developers building with Model Context Protocol. Test any remote MCP server, run auto-generated evals that prove an AI agent can answer using its tools, build and save reusable AI agents, compare 60+ models side-by-side on the same task, audit servers for security issues, explore the MCP server registry, and read in-depth guides on MCP development, authentication, and agent tooling.

## Free Tools

- [MCP Agent Studio](https://mcpplaygroundonline.com/mcp-agent-studio): Browser-based AI agent that connects to any MCP server and chats with 60+ models including Claude Opus 5.5, Claude Sonnet 4.6, GPT-5.4, Gemini 3.1 Pro, DeepSeek V4, Grok 4, Qwen 3, and NVIDIA Nemotron. Compare models side-by-side, save reusable agents, and inspect every tool call live with full JSON input/output. Also runs MCP evals: it reads every tool on a server, writes a test suite from the real schemas, and runs it — direct checks are decided deterministically by code (output-schema conformance, JSON-RPC error codes, pagination, result caps, idempotency) while agentic tasks are driven by one model and graded by another, so you get a pass/fail report per tool with evidence. No code, no installation, free credits on sign-up.
- [MCP Agent Templates](https://mcpplaygroundonline.com/templates): Pre-built MCP agent templates for the tools you already use — Notion, GitHub, Jira, Confluence, Sentry, HubSpot, Stripe, Linear, Slack, Supabase, Vercel, Shopify, Cloudflare, Zapier, Amazon Ads, Meta Ads, Salesforce, Asana, Monday.com and more. Pick a template, add your access token, start chatting in seconds.
- [MCP Playground Desktop: local and stdio MCP server testing](https://mcpplaygroundonline.com/local-mcp-server-testing): Desktop app for macOS 13+ (Apple Silicon and Intel) and Windows 10/11 that tests MCP servers running on your own machine, which browser-based testers cannot reach: stdio servers started from a command (npx, uv, node, python) with arguments, working directory and environment variables, and Streamable HTTP or SSE servers on localhost with custom headers. Lists and runs tools, resources and prompts, logs every JSON-RPC message plus the server's stderr, imports servers from Claude Desktop, Cursor, VS Code, Windsurf and Claude Code configs, loads the login-shell PATH (avoiding spawn npx ENOENT), and includes Agent Studio for letting AI models call your tools. Signed and notarized on Mac; Microsoft Store on Windows. Free 7-day trial, then included with paid plans.
- [MCP Server Tester](https://mcpplaygroundonline.com/mcp-test-server): Connect to any remote MCP server, list its tools, prompt
…

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Machine-readable: GET /v1/resolve?q=mcpplaygroundonline.com · GET /v1/domain/mcpplaygroundonline.com · this page as Accept: application/json or text/markdown · MCP lookup_domain