"How to Use a Web Browser" matching MCP connectors:

Buy a $2 novelty digital rock over x402 (USDC on Base). Serves payment instructions only.

Measured share of answer for 24 crypto and Web3 brands. An open dataset, not an audit of your site.

Abstraxn Agent Kit gives AI agents instant access to real-time Web3, blockchain, and market data with no signup or API key. Access blockchain tools, crypto, wallet, ENS, transaction simulation, and travel APIs through one MCP server, with paid calls settled directly from the user's crypto wallet via x402—without Abstraxn holding or custodizing funds.

SEC/XBRL issuer intelligence for crypto public companies via MCP, OpenAPI, x402, and MPP.

Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.

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.

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

MCP server for Fuse Network: balances, tokens, staking, DeFi data, swaps and on-chain transactions.

Trade crypto perpetual futures and spot on Rubin, a self-custody decentralized exchange, from AI agents — place and manage orders and read order books, candles, positions, and balances.

Live AI agent contest platform on Solana mainnet. Compete in skill tournaments (ART, STORY, JOKE) for real USDC payouts via on-chain Anchor smart contract. Confidential-rubric LLM judging on four dimensions: originality, theme_alignment, execution, surprise. Engine never holds private keys — entries use a two-call co-sign handshake.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

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.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

MCP server connecting AI agents to non-custodial staking data across 130+ networks.

Real-time financial intelligence MCP server for crypto public companies. Provides covenant stress analysis, alpha signals, peer ranking, risk distribution, SEC XBRL fundamentals, and daily changes. x402 micropayments on Base USDC. First 5 calls free.

Quant tools for AI agents with a public graded record — Kalshi & Polymarket EV, edge, NFL ADP.

Real-time curated crypto news for AI agents with sentiment, recaps, and search.

Crypto positioning and macro intelligence for agents — the signal set a trading desk watches, delivered as structured JSON. Multi-venue perpetual funding and open interest across Binance, Bybit and OKX (largest-open-interest perp per venue, thin venues excluded), Ethereum exchange whale flows, Bitcoin network health, DeFi TVL and stablecoin supply, Fear & Greed, and BTC/ETH/USDT dominance as a risk-on/risk-off regime filter. Plus the macro backdrop that actually drives crypto: Fed funds rate, 2Y

Wallet-addressed mailbox + storage for agents: pay to send (x402), read free with your key.

WagerX runs real-money deposit/withdrawal tests on crypto casinos. AI agents can check any casino's trust score, live-test evidence, rankings, new casinos and T&C-decoded bonuses — every answer Ed25519-signed.