"An introduction to prompt engineering" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
GodPrompt MCP + Agent Skill for coding agents with TDD, debugging, verification, and task routing.
Diagnose why an AI agent failed and get the verified fix instantly. Free, no token.
Simulate, test, and analyze cloud architectures without deploying real infrastructure. Cloud World Model enables AI agents to model cloud environments, evaluate architecture behavior and costs, run failure and chaos simulations, and explore infrastructure scenarios across cloud providers.
Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
Kilotest leverages 10 rule engines to test web pages for front-end quality (accessibility, usability, and standards conformity) and report results with specifiable granularity.
What is known to be broken in an MCP server or API operation, with the check that found it.
The world's first named AI prompt quality score. Score, optimize, and compare LLM prompts before they hit any model. Free tier available. Built on PEEM, RAGAS, G-Eval, and MT-Bench frameworks. x402-native on Base.
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.
Scan GitHub-hosted AI skills for vulnerabilities: prompt injection, malware, OWASP LLM Top 10.
Test an email before it goes out: a disposable address, 41 checks with RFC citations, a fix plan.
Pay-per-call MCP server. Vetted human experts review AI-generated content (text, images, video, audio, social posts), audit reasoning chains, run prepublish safety checks, and gate high-stakes actions for human approval. 7 paid tools at $1.00 each plus 4 free tools (list_offerings, list_expert_profiles, get_result, verify_certificate). Payment via x402, USDC on Base mainnet. Approved outputs receive an on-chain Taste content certificate downstream agents verify before consuming.
Probe a signup URL you own and score whether an AI agent can sign up unaided.
Resolve whether an uncertain side-effecting action completed before software retries it.
Agentic code review, no signup to try: reality gates + frontier-model review, with veto.
Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402.
Give AI coding agents access to your Vynix visual feedback, bug reports, and AI diagnosis.
Evidence-bound second-opinion audit of an agent conclusion against caller-supplied evidence.
AgentReady.market audit: can an AI shopping agent find, understand and BUY on this store? /100.
Verify an agent's advertised route, price, payment details, and schemas against its live endpoint.
