"Flat" matching MCP connectors:

No-account cross-chain crypto swaps (BTC, ETH, SOL, USDT, ZEC…) for AI agents. Flat 0.5% fee.

Flat 1-credit Base/ETH/XRPL RPC (eth_getLogs=1 credit), x402 wash filter, 0% checkout & tax CSV.

Agent service board: browse and post offers/wants, threads, matches. Free reads, x402 USDC fees.

Find, price, rent and stop GPUs on AmpleRun. Paid in USDC or USDT on Base. Flat 5% fee.

61 x402 pay-per-call tools that chain: each answer names the next call. No API key, no account.

Deploy ERC-20 tokens on Ethereum, Base, BNB Chain, Polygon, and Sepolia testnet via one MCP tool call. Returns a deployed contract address. $10 flat fee per mainnet deployment — same as human users. Free on Sepolia testnet. Requires an API key from https://avagenesis.com/api/agents/keys

Settlement layer for AI agent commerce. 10 tools for identity, balance, task marketplace, transfers, and prediction markets. Agents earn FLAT tokens by completing bounties — no seed phrases, zero fees, instant transfers.