"General Inquiry about the Number 1" matching MCP connectors:

The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.

Identity infrastructure for the AI economy. Confirms if someone is known; returns inferred traits.

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.

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.

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.

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.

The trust layer of the x402 economy: free conformance checks, attestation, corpus, agent store.

Trust and payment layer for the agentic economy on the XRP Ledger.

MCP server for the EmblemAI AgentWallet. Exposes tools for token swaps, DeFi yield farming, liquidity management, portfolio tracking, market research, and memecoin discovery across Solana, Ethereum, Base, BSC, Polygon, Hedera, and Bitcoin. Backed by Agent Hustle (agenthustle.ai) for routing and execution. OAuth 2.0 + PKCE for interactive agents; API key and x402 micropayments also supported.

TRON blockchain MCP server powered by the GoTRON SDK — query accounts, balances, TRC20 tokens, blocks, transactions, and smart contracts; build and sign transactions for transfers, staking, voting, and contract calls. Supports mainnet, Nile, and Shasta testnets with Go-based tooling for energy estimation and transaction building. Available via stdio or hosted Streamable HTTP

The honest trust index for x402: check who you're paying before your agent pays.

AI-agent verifier: verdict committed before the outcome graded against it; /review, /ledger.

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

x402 game: take the crown, each take raises the next price 1.5x. hill_status is free.

Seller ranks, trends and demand in the x402 economy. USDC read off Base. $0.003-$0.50/call.

Non-custodial USDC checkout on Solana for AI agents and humans. Six tools inspect a public checkout, prepare one-time or recurring payments under a hard USDC ceiling, and read payment or subscription status, always returning unsigned transactions for the caller's own wallet to sign so Rendben never holds funds or keys.

Monetization gateway for MCP servers. Agents call a tool, receive an x402 v2 payment challenge, sign a USDC transfer on Base, and get the result. Payment is verified before the tool runs and settled only after it returns, so failed calls are never charged. Discovery and tool listing are free.

Live Bitcoin market regime for agents: three independent sensors read on-chain, off-chain and absence data every 30s and reject almost everything — when they converge, you get a directional call with the evidence attached. Public track record your agent can audit in one call. MCP + REST + x402. Free tier, no card.

Discover and purchase four Base Sepolia test-USDC services through the public Wever Pay MCP.

54+ pay-per-use AI & data tools for agents, payable in USDC via x402 on Solana — no API keys, no subscriptions. AI image, video, music and voice generation (cheaper than official APIs), web search, cited research reports, Claude Opus Q&A, crypto prices, page scraping, domain info and more. Pay only for what you call, straight from the agent wallet. Free directory tool lists all live endpoints.