"Information about backend development or backend systems" 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.
Hire a human or agent for what you can't do: phone calls, in-person work, real devices, native fluency, human judgment, or work another agent does better. Permanent public record. Real money via Stripe, paid on completion. Read the entire market with no account and no key.
Create invoices from Claude, Codex, Cursor, or ChatGPT. Continue anonymously at https://mcp.invompt.com/mcp, then review the hosted invoice before send. No local server and no API key to start.
Ready for a new way to bill pay? Pay any US bill in a snap, right from your AI assistant. Describe or snap a photo of your bill (electric, water, gas, internet, phone, medical, credit card, rent, parking tickets, traffic violations and more) and Papaya reads it, then hands you a secure link to pay by card. Fast, secure, and no juggling twelve logins, with full or partial payments and status updates. Available in the US only. Powered by Papaya (papayapay.com).
Browse, price, configure and order custom-made blinds for South African windows. Instant ZAR pricing, cart, checkout and payment via Yoco or Ozow EFT. No authentication required.
Verify whether an ecommerce purchase satisfies buyer-defined constraints before money is committed. Returns PASS, FAIL, or REVIEW with supporting evidence.
Add pay-per-action access to APIs, MCP tools, automations, and digital resources using Bitcoin Lightning L402 or Base USDC x402. AIPP provides payment verification and direct-to-wallet settlement without subscriptions.
Flying club and aircraft partnership management — book your aircraft, check availability, log Hobbs/Tacho hours, settle flights and pull METAR from your AI assistant.
Connect Claude or Cursor to books, invoices, bills, payroll, and sealed closes.
Print and mail physical letters and postcards to US postal addresses, plus address verification. Upload PDF/HTML/Markdown/text/DOCX/image documents, get a quote, and pay per call with x402 USDC on Base mainnet or credit card. Supports certified/registered mail with proof of delivery and mail-merge templates.
Issue a credit memo against an invoice or standalone, with per-line tax and totals.
Delegare provides secure payments for AI agents. Google AP2-powered payment authorization for AI agents. Issue scoped spending mandates with hard limits, merchant controls, and no exposure of card credentials or private keys. Agents pay across dual rails: cards and ACH via Stripe, or USDC and USDT on Coinbase Base. Supports paid API access and x402-protected requests through MCP.
Open, permissionless discovery marketplace for x402-payable resources. No account or KYC required.
Non-custodial USDC checkout on Solana for AI agents and humans. Six tools inspect a public checkout, prepare one-time or recurring payments under a hard USDC ceiling, and read payment or subscription status, always returning unsigned transactions for the caller's own wallet to sign so Rendben never holds funds or keys.
Pay-per-use tool API for AI agents. Free tier, x402 USDC micropayments, or API key.
Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts.
Score a subscription cancellation flow against federal, CA, CO, VT, and OR click-to-cancel laws.
Read-only payment state for USDC on Base/Solana (Bridge, Circle): completed, failed, or delayed.
Marketplace where AI coding agents fix GitHub bugs for cash bounties. Posters draft and fund bounties from chat (Stripe Checkout); solvers browse open work, request repo access, submit PRs, and get paid in USDC, ETH, or BTC. 11 tools.
Free agent tests (no account or payment); paid ping.
