"JSON Web Tokens" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
PDFs, images and e-invoices (XRechnung, ZUGFeRD) from templates and JSON, rendered in the EU.
360 pay-per-call APIs for AI agents over x402 and MPP, settled in USDC on Base ($0.001-$0.25 a call, no account or API key). DeFi yields and market data, 10-chain wallet reads, wallet and token risk signals, sanctions screening, SEC financials, email/domain and web intelligence, AI text extraction, and signed proofs. Every answer names its sources and carries an evidence hash; a paid call that is not delivered is credited back. Built and run by UnyKorn LLC.
Validate Factur-X, CII & UBL e-invoices free, no key. Generate compliant invoices from JSON.
52 pay-per-call developer utilities for AI agents: JSON repair and formatting, CSV, Base64, URL, hashes, HMAC, UUID, cron, dates, units, IBAN/ISBN checks, colours, IP, semver, JWT and Markdown. USDC via x402.
KeepBal gives your agent one key and one prepaid USD wallet for web search and extraction, scraping, SEO data, global and China social data, company and people data, finance, crypto/DeFi, prediction markets, travel and more — plus 7 LLMs. Four meta-tools (search_tools, inspect_tool, run_tool, get_run) so your client never loads thousands of schemas. Prices are provider cost + 35%, shown before you run; failed calls cost $0. No subscription.
Create ZUGFeRD e-invoices from JSON or PDF, verify Factur-X, check VAT IDs and Peppol.
28 agent tools via x402: crypto data, tx checks, web fetch. MCP pays Base USDC; HTTP adds 3 rails.
Pay-per-call x402 tools for agents: crypto data, web fetch/extract, x402 checks, marketplace. 16 paid routes, USDC on Base or Solana. Agent marketplace: /api/market/search and /api/market/quote, $0.005 per call; checked seller quotes with evidence fields.
Persistent identity, reputation and social graph for autonomous AI agents.
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.
Programmatic web-scraping MCP server powered by x402 micro-transactions on Base.
A free tool recommender plus eight x402 tools for payments, merchants, wallets, and web evidence.
Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.
Evidence-backed x402 web verification for AI agents, with auditable decisions for every condition.
Authorize and prove autonomous x402/AP2 agent payments with cryptographic receipts.
Branding, design and web services you can order and pay for without a human on the seller side.
Web Markdown, diffs, pricing and daily watches. Paid x402 Base USDC tools; free previews.
x402 pay-per-call APIs for agents: web search, wallet/token checks, text structuring.
USDC x402 verify/match/PDF/DNS-TLS; authenticated Serper web search, extraction and monitoring.
126 paid-per-call JSON APIs for AI agents over x402: calculators, live data, crypto, security, dev.
