"Exploration of Free Cursor Thinking Concept" matching MCP connectors:

Scores web domains: TLS, headers, DNS, speed. Free triage, $0.01 per report, no signup.

Signed machine messages + wallet trust gates via x402; free verifiable agent passports.

Teardrop is the native economic layer for AI agents, providing a robust suite of tools for multi-chain portfolio tracking, DeFi yield analysis, and gas estimation. It enables autonomous agents to securely find Web3 data and manage micro-payments on-chain with zero human intervention.

Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).

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

Provides a platform-agnostic specification of the technical features every decent website should have

Eligibility-first UK & EU grant discovery, inside ChatGPT and Claude. Checks eligibility before recommending, explains why each grant fits, and cites the funder's own page on every answer — with an honest "competition_risk: unknown" when the data isn't there. 6 tools: search, fetch, find_opportunities, should_apply, explain_opportunity, complete_profile. Transport: Streamable HTTP. Auth: OAuth 2.1 + PKCE. Free to install, no card required.

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

Pay-per-use tool API for AI agents. Free tier, x402 USDC micropayments, or API key.

Federated search of books and papers, BibTeX/RIS citations, open-access retrieval and reading.

Free, keyless real-time air quality (US AQI plus PM2.5, PM10, ozone, NO2, SO2, CO) for any city.

Point-in-time, survivorship-free SEC EDGAR fundamentals + smart-money signals for AI agents.

Free, keyless real-time currency conversion and exchange rates for any currency pair.

Free, keyless real-time weather and 7-day forecasts for any city worldwide.

Free, keyless postal/ZIP code lookup: place name(s), state/region, and coordinates.

Free, keyless domain registration lookup via RDAP: registered, available, registrar, expiration.

Free, keyless public holidays lookup for any country and year, plus single-date holiday checks.

Search French mountain holiday rentals and contact owners directly — commission-free.

Free, keyless live cryptocurrency prices, market cap, and 24h change via CoinGecko.

Verify PyPI and npm packages, symbols, and version diffs against real artifacts. Free, no account.