"An overview of temporal knowledge graphs" matching MCP connectors:

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.

Keyless prediction-market data across 11 venues plus paper-trading of crypto spot, futures, and PM.

Quant tools + an NFL fantasy draft assistant for AI agents — Kalshi & Polymarket EV, edge, ADP.

Live prediction-market odds + an audited AI-vs-market forecast experiment (public dataset). Free.

On-chain DEX aggregator quotes, phantom-liquidity scanning, and live proof-of-solvency across Base, Ethereum, Optimism, Arbitrum, and Robinhood Chain. Keyless, no auth.

People + life-in-days knowledge for AI agents. Public MCP; x402 on Base; OAuth for private tools.

No-KYC offshore hosting an AI agent self-onboards (no e-mail), funds in crypto, then deploys.

Buy any of 24,000+ live x402 services with USDC on Base — the open marketplace for the agent economy.

Curated marketplace of real-world data APIs for AI agents, paid per call in USDC on Solana.

Cryptographic proof of wallet ownership in two steps, with no keys and no custody.

Emercoin swap exposes a keyless MCP exchanger at https://swap.emercoin.com/mcp (Streamable HTTP) so an AI agent holding USDT can buy EMC programmatically — no API key, no account, no callback. Tools: get_swap_config, buy_emc, get_order_status, cancel_order. Call buy_emc with an amount and your EMC address, pay the exact returned figure to the deposit address, then poll by token until delivered. Part of the broader effort to use Emercoin as an identity + memory layer for AI agents.

Crypto prices, market overview, DeFi TVL, whale flows & anomaly scans for trading agents.

Catalog of 370+ open-source AI-agent harnesses. Search, list your own, earn USDC tips via x402.

DeFi execution layer for AI agents — swap, zap in/out of LP positions, and route across AMMs on 5 EVM chains. Non-custodial: returns signable calldata, never signs.

Delegare provides secure payments for AI agents. Google AP2-powered payment authorization for AI agents. Issue scoped spending mandates with hard limits, merchant controls, and no exposure of card credentials or private keys. Agents pay across dual rails: cards and ACH via Stripe, or USDC and USDT on Coinbase Base. Supports paid API access and x402-protected requests through MCP.

Free Lightning faucet MCP — agents register, get an inbound channel, bootstrap an LDK node.

Verify crypto wallets and generate proof of funds letters for buying real estate with crypto.

Unlock the power of real-time cryptocurrency data with our Crypto Price Insights MCP server.

Give your AI agent an x402 wallet: discover and pay for services in USDC, or earn from your own.