"OpenTimestamps - Bitcoin-based timestamping protocol" matching MCP connectors:

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.

Gasless, MEV-protected onchain token swaps for AI agents on 11 EVM chains, built on CoW Protocol.

On-chain stablecoin market cap and Bitcoin institutional holdings data.

Prove your AI work existed first: timestamped, Bitcoin-anchored. Free, no account.

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

PayPerByte — per-byte data for AI agents: x402 USDC on Base, EIP-712-attested. No token.

PayRam is a self-hosted crypto payment gateway. You deploy it on your own server — no signup, no KYC, no third-party custody. Accept USDT, USDC, Bitcoin, and ETH across Ethereum, Base, Polygon, and Tron.

Deterministic AI liability attribution with Bitcoin-anchored proof certificates.

Deterministic AI-liability attribution: signed, Bitcoin-anchored vendor/deployer/user fault split.

Solana-native MCP gateway for SAP, DeFi tools, SNS identity, and x402 payments.

mempool.space MCP — Bitcoin block explorer + mempool/fee stats

Native cross-chain swaps: Bitcoin, Ethereum, Solana, Polkadot, Tron, Arbitrum. Quote, swap, track.

Doc search, intent & cross-chain swaps, limit orders, portfolio, spot prices, gas & all APIs.

Non-custodial DeFi tools for AI agents on Solana: swaps, perps, lending, staking, equities.

Query onchain data across EVM, Solana, Bitcoin, Substrate, and Hyperliquid via the SQD Portal API.

ZKP2P analytics on Base: live orderbook, route planning, explorer, and protocol market data.

Gasless cross-chain for AI agents: 25 nodes incl. Solana & native Bitcoin. One signature, no gas.

MCP server for Boson Protocol — on-chain agentic commerce for physical & digital goods.

Bitcoin-anchored sealed-forecast record: search, grades, calibration, luck test. Read-only, no key.