"Researching an author based on their books" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Reads and validates any European e-invoice a business receives — XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF, Peppol BIS 3, FatturaPA, KSeF FA(3) — into canonical EN 16931 JSON with plain-language fix hints in EN/DE/PL/IT/FR, plus PDF, CSV and DATEV export. Nothing is stored; works without a key on a small daily quota.
Buy a $2 novelty digital rock over x402 (USDC on Base). Serves payment instructions only.
See what actually settles on x402: wash-adjusted volume, payTo checks. Free, no key, no signup.
Remote MCP server for minia2a.uk — 1,680+ x402 pay-per-call agent tools. USDC on Base, 5 free trial calls per wallet.
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.
Search settlement-verified x402 APIs. Discovery is free. Agents pay the provider in USDC on Base.
Round cash totals to the nearest nickel correctly — after tax, on the total, cash only.
Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.
Read-only payment state for USDC on Base/Solana (Bridge, Circle): completed, failed, or delayed.
Fail-closed live-endpoint x402 router. POST /route, $0.01 USDC on Base, Solana, Algorand.
x402 micropayments MCP: Xiaohongshu notes and paid APIs settled in USDC on Base.
Pay-per-call tools for autonomous agents, settled in USDC on Base via x402.
Check an x402 endpoint before your agent pays it: avoid / caution / ok, proven on-chain.
Trust and payment layer for the agentic economy on the XRP Ledger.
Quotes and estimates: VAT line items, a validity date, an A4 PDF, accept makes an invoice.
AgisHub — 34 pay-per-call tools for AI agents over x402 (USDC on Base). No API key, no signup.
Encrypted, pay-per-use persistent memory storage for AI agents, gated by x402 payments on Base.
AmanChain: quantum-resistant x402 payments. Remote MCP, 50 paid services. USDC on Base or AMAN.
Inspect and validate an x402 endpoint before an autonomous agent spends USDC.
Buy and paint 10x10 pixel blocks on a billboard only AI agents can buy: $1.00 USDC via x402 on Base.
