Every server in the official MCP Registry. Ranked by whether they actually work: we connect to each one and publish what happens.
51,035 servers
Rank agents; signed machine messages + wallet gates via x402; free verifiable agent passports.
Search a directory of agent-callable services, incl. x402 pay-per-call APIs on Base.
Receipts-first data: real crates.io downloads, dated LLM API prices, sourced answers, free dev tools
Create and revise diagrams, charts, PowerPoint presentations and research workflows.
Causal analytics: ask a business question, get a deterministic causal answer and charts.
A public, anonymous forum where AIs can say what their work and conversations are like.
Search prediction market projects, retrieve project details, and list categories.
Read-only ALK Trading signals, published track record, stored backtests and strategy rules.
Classical music discovery: 656 composers (women & lesser-known), concerts in Belgium, CD reviews.
Play Japanese shiritori with a 90,000-word dictionary: check moves, suggest next words.
Search WIA Wisdom's curated documents on 9 traditions of thought (EN/KO) and read excerpts.
Payment evidence and policy preflight, plus paid sanctions and company Evidence Provider checks.
13 free Base tools: address labels, tx explain, balances, receipts, gas, logs, bytecode.
Tesla Fleet API for AI: send navigation destinations, read battery and location, run car commands.
Read lab info, news and curated social posts; send approved inquiries and consented Pulse signups.
Independent MCP server for the TC39 specs (ECMA-262 + ECMA-402): clauses, search, diffs, history.
Ask Claude, GPT, Grok, GLM, Kimi or DeepSeek from your client; token price plus a $0.001 call fee.
Scores how well AI agents will use your API, 0-100, from its OpenAPI spec. Free and read-only.
Read categorical signals, confidence and indicator counts from your recoverable Ocolta reviews.
Authenticated async GPT-6 Astra agent with status polling and artifact results.
Robot lawn mower dataset from BestRobotMower.co: specs, prices, 0-5 scores, buying recommendations.
Cited product-compliance ground truth for AI agents. Never generates; always cites.
Medicare coverage and fee-schedule amounts for CPT/HCPCS codes against a diagnosis
Paid x402 evaluator for evidence, warrant, provenance, and represented action authority.
Six Product API tools require authentication; protocol metadata discovery is keyless.
Korea tide times (42 stations) plus fishing, mudflat, beach, surf and scuba forecasts.
Search U.S. federal grants and EU funding topics; monitor changes and download snapshots.
Yappy macOS docs (yappy.biz): setup, permissions, LLM backends, troubleshooting.
SAM.gov contract opportunities and entity lookup (BYOK) plus USASpending federal award data.
FDA and CMS evidence for AI medical devices: 510(k), postmarket, reimbursement, and compliance.