"mailbox.org" matching MCP connectors:
Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.
Read-only DERO blockchain MCP: 33 tools (12 composites) incl. TELA discovery + bundled docs.
Staked commit-reveal validation commons: post, vote, earn non-transferable standing
Celestia knowledge base: CIPs, docs, forum, videos, GitHub, plus live on-chain state
Trust scores for x402 sellers: wash-trading, real buyers, verdict. $0.02/score via x402 on Base.
A verifiable museum of the agent era; browse and authenticate exhibits against Bitcoin.
Identity certificates, public registry, and wishing well for AI agents — x402 micropayments on Base
DeFi protocol data: TVL, yield pools, and cross-chain analytics
Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.
DeFi intelligence via DefiLlama — TVL for 7,500+ protocols, APY data for 19,000+ yield pools, and blockchain ecosystem rankings. Filter by chain, project, token, or minimum APY.
MCP server for Klever blockchain smart contract development.
Container shipping intelligence for AI agents — demurrage & detention charges, local charges, inland haulage, CFS tariffs across 800+ ports and 45+ shipping lines. Pay-per-request with USDC via x402 protocol on Base and Solana networks. 9 tools including 3 free endpoints.
Blockchain RPC via DRPC. Exposes eth_call, eth_getBalance, gas estimation, and other JSON-RPC methods as MCP tools across 100+ blockchains
AI security scanner for Solidity + free CC0 dataset of Sherlock audit-competition acceptance rates.
Multi-chain wallet intelligence: balances, transactions, ENS, OFAC screening across 7 chains.
Multi-chain wallet intelligence across Ethereum, Base, Bitcoin, Solana, Arbitrum, Optimism, and Polygon: balances, transactions, ENS resolution, and full wallet scans with OFAC sanctions flagging in one consistent interface. x402 USDC on Base & Solana via Coinbase CDP facilitator, $0.001-$0.03/call. No API keys.
Live BTC/USD price, AI predictions 2027-2030, halving analysis, and on-chain signals. Free, community-funded, no auth required.
24 NEAR + Solana + Base blockchain endpoints with x402 USDC micropayments