A
licenseA
qualityB
maintenancePay-per-use semantic web search for AI agents. Powered by SearxNG, agents pay in sats via Lightning Network micropayments — no API keys
required.
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Apache 2.0
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"A search for academic or research papers" matching MCP servers:
- AlicenseAqualityBmaintenancePay-per-call USDC payment proxy for AI agents. Issue scoped Pay Tokens with hard spending caps and auto-journal every charge to freee / Money Forward / QuickBooks.6572MIT
- Alicense-qualityCmaintenanceProvides a three-layer payment firewall for AI agents, enabling identity verification, risk screening, and execution authorization with on-chain policy enforcement for secure and auditable transactions.484MIT
- AlicenseAqualityBmaintenanceKeyless crypto payments for AI agents. One MCP call turns any wallet address into a non-custodial crypto payment link or tip jar, no API key and no account, with funds settling straight to your wallet at a 0% platform fee (USDC/USDT, BTC, LTC, DASH, DOGE, ZCASH).6369MIT
- FlicenseAqualityCmaintenanceMCP server that lets a chatbot browse eSIM plans, sign in, prepare quotes, and execute wallet or card purchases on an existing eSIM platform, with safe typed tools.19
- AlicenseAqualityDmaintenanceMCP server that gates API calls to AI agents using proof-of-work (free) or Lightning payment (3 sats), providing challenge, verify, and status tools for per-call authentication without accounts.3441MIT
bolthubofficial
AlicenseAqualityAmaintenanceDiscover and pay for APIs and MCP tools per call over Bitcoin Lightning (L402): search the bolthub marketplace, preview prices, and pay from your own wallet (LND, NWC, LNbits) with hard budgets, prepaid credit, scoped sub-agent delegation, and verifiable receipts. Non-custodial and works without a wallet for search and free tools.19MIT
EntRoute MCPofficial
AlicenseAqualityFmaintenanceMCP Server for AI agents to discover and call pay-per-request APIs via EntRoute. Give Claude, Cursor, Windsurf, or any MCP-compatible agent access to 350+ verified x402 API endpoints across 110+ capabilities — DeFi prices, web search, prediction markets, news, and more.3131MIT- AlicenseAqualityAmaintenanceMCP server for eBay buyer-side workflows enabling search, watch, bid, buy, and management of MyeBay via a hybrid REST and Trading API stack.151Apache 2.0
- AlicenseAqualityBmaintenanceLets AI agents discover, pay for, and call any HTTP API per request using USDC, with gasless nanopayments and no API keys or accounts needed.5117MIT
- FlicenseAqualityCmaintenanceGovernor is an MCP server that acts as a safety belt for AI agent payments, providing a three-layer deterministic evaluation (rules, behavior anomaly, and intention coherence) to approve, escalate, or block payments before execution, and integrates directly with Claude Code.3
- AlicenseAqualityCmaintenanceThe MCP gateway that lets any AI agent discover and pay metered APIs on Base or Solana — without the user wiring payments themselves.3161Apache 2.0
- AlicenseAqualityAmaintenanceConnect Peil to Claude (or any MCP client): log hours, draft invoices from unbilled hours, and check where you stand — from a prompt.822MIT
- AlicenseAqualityBmaintenanceMCP server for VoxFactura enabling AI assistants to query business data (invoices, expenses, project margins, clients, VAT) and create draft quotes or mark invoices paid via a scoped API, with no direct client sends.11MIT
- AlicenseAqualityAmaintenanceRead-only MCP server for the Swiss eBill portal, enabling users to list bills and download invoice PDFs via an authenticated browser session. It cannot approve, release, or pay anything.829MIT
- AlicenseAqualityCmaintenanceEnables AI agents to search, license, and pay for rights-clean music per use, returning a verifiable license certificate.5MIT
- FlicenseAqualityDmaintenanceSpending limits for AI agents. Create budgets, enforce limits, track spend across x402, cards, MPP, or any payment rail.719
AdvinPay MCPofficial
Alicense-qualityCmaintenanceMCP server to connect AI assistants to the AdvinPay payment API, enabling PIX charges, transaction queries, and documentation search.MIT
FlatCash MCP Serverofficial
Alicense-qualityCmaintenanceEnables AI agents to buy, hold, and transfer CPI-pegged FLAT stablecoin without wallets or gas. Provides tools for earning through tasks, trading, and managing balances via MCP.26MIT
@hpp-io/x402-mcp-bridgeofficial
Alicense-qualityBmaintenanceEnables AI agents to autonomously pay for and discover services using HPP USDC.e over the x402 protocol, without API keys or manual signing.167Apache 2.0
