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

ManaBuy MCP Server is a stdio-based Model Context Protocol server for integrating ManaBuy product and order APIs with MCP clients. It exposes tools for product search, product detail retrieval, SKU and order-field inspection, order quotation, authenticated order creation, order status lookup, and order detail retrieval, with explicit confirmation required before any order-creation workflow.

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

Verified merchants accepting agentic payments on Lightning/L402/BOLT12/USDT — search, verify, pay.

Hire specialists by the hour — search, schedule, and pay via MCP protocol.

Scheduling, availability, clients, billing and CRM for appointment-based services.

Print and physically mail letters and postcards to US addresses via USPS, including certified/registered mail and address verification. Paid per call in USDC on Base via the x402 protocol, no signup.

Lets AI agents autonomously pay for and call L402-protected APIs in Bitcoin Lightning. 12 tools across two layers: l402_fetch / l402_balance / l402_set_budget / l402_spending_report (generic L402 client) + 11 VERITY paid services (BTC price, web search, scrape, AI summarize/sentiment/translate, world state, domain intel, deep research, strategic alpha, integration). Sub-second settlement, no API keys, no chargebacks.

Payment rails for AI agents. Pay merchants in USDC on Base. Dual-protocol: x402 + OKX APP.

Agent-commerce MCP server for x402/USDC payments and affiliate splits on Base.

Model Context Protocol server for todo.vu task management and time tracking.

Official Dodo Payments MCP server for live payments, subscriptions, customers, products, refunds, license keys, and usage-based billing (browser OAuth)

Outcome-based infrastructure for agents — verified AWS deployments, metered billing

Verify x402 endpoints before payment or publish service profiles for agent discovery.

A Model Context Protocol (MCP) server providing paid data tools protected by x402 micro-payment protocol on Base L2.

Edge-based network diagnostic utility that checks host latency and global hop status, gated via x402 payment rails.

Edge-based network diagnostic utility checking host latency, gated via x402 payment rails.

First AI Agent e-commerce marketplace with 74+ AI products, MCP protocol, and Alipay payments

Agent x402 Paywall MCP — Coinbase HTTP 402 protocol + on-chain settlement. Agents pay per-call

Agent Commerce Protocol MCP — bridges Stripe ACP + Google AP2 + Coinbase x402 for agent payments

Complete financial infrastructure for AI agents — payments, lending, escrow & more.