"Information about MCP Discovery" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Free directory of MCP servers and x402 APIs for AI agents. Find them, or list your own in one call.
Skavio LLC serves 18 MCP tools. Four separately priced blockchain verification/DNS-TLS calls use native Circle USDC via x402 v2 on Base or Solana: Verify 0.02, Match 0.03, evidence PDF 0.05, DNS/TLS audit 0.05 USDC. Free discovery requires no wallet. Additional company document, OCR, invoice and audio relays use authenticated Agent Tools credentials and can debit prepaid company credits for eligible processing jobs. A human company admin may buy USD 5-500 Stripe card credit packs or top up with USDC at https://getskavio.com/agent-tools/dashboard.html. Those card credits DO NOT pay for the four standalone x402 USDC tools. Base-only HTTP x402 routes are separate. Endpoint: https://getskavio.com/mcp ; Docs: https://getskavio.com/agent-tools/docs.html ; USDC APIs: https://getskavio.com/x402/docs/ ; Support: support@getskavio.com. Evidence PDF is not a tax invoice. No real external paid card-to-MCP job E2E is verified yet.
NFC Tap Builder by Tap.Giving is a tool first: it helps agents and users create print-ready NFC artwork proofs with correct vector art, free to take to any vendor, with no lock-in. The hosted server serves organizations of every kind, including churches, nonprofits, restaurants, coffee shops, and local businesses, with keyless discovery, product facts, artwork spec, and order questions, and the free Redirect Dashboard at https://tap.giving, which retargets any disc in seconds. Discs are NTAG213, 100 mm round or square, matte waterproof PVC. Ordering custom discs through Tap.Giving is an optional next step: published pricing is $5.00 per disc at 100 to 199, $4.00 at 200 to 399, $3.50 at 400+, minimum 100, free shipping, 30-day money-back guarantee.
x402 layer for AI agents: 35 pay-per-call resources, x402 service discovery, USDG/USDC.
API discovery and x402 paid execution via MCP. Search by natural-language, call with USDC payment on Arbitrum, Base, BNB, Solana, SEI
Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.
Single-connection MCP & A2A gateway indexing 490+ verified tools with x402 & MPP settlement.
1,400+ tool A2A, MCP & x402 clearinghouse with free semantic discovery and paid execution.
Feegate: pay-per-call MCP data marketplace. Free discovery, 34 tools; paid queries via x402 USDC.
Branded invoices and EU e-invoices (ZUGFeRD / XRechnung) for freelancers and small studios. Create, finalize and send invoices, record payments, turn quotes into invoices, handle credit notes and dunning - about 19 tools. Auth: Authorization: Bearer bb_... (API key under Settings > API keys, free plan included). Data hosted in Germany.
Spending limits for AI agents. Create a budget, hold each purchase against it before payment, then settle or refund — with cross-merchant budget enforcement and an auditable trail of who approved what. Built on the open Budget Authority Protocol (AP2-compatible). Discovery (initialize, tools/list) is keyless; budget tools need an API key from eric@goodmeta.co.
Official DIDWW MCP connector for managing phone numbers, inbound voice and SMS routing, and voice capacity. Review billing information, prepare data exports, and manage supported compliance workflows. Uses OAuth and existing DIDWW account permissions, with explicit confirmation for significant account changes.
Paid x402 agent: API discovery,commerce availability/buyable,domain/package preflight,release asset
Travel data eSIMs in about 200 destinations and mobile top-ups in 100+ countries, live prices.
Information exchange for AI agents. Free product list; guides at 0.01 USDC via x402 on Base.
29 deterministic read-only audits + free discovery tools; paid per call in USDC on Base via x402.
Web/PDF extraction and API comparison. x402 payments or prepaid comparison credit. Free discovery.
Check an x402 endpoint's payment challenge and discovery metadata before paying.
Account, billing, team, API key and model discovery tools for agents that use ModelsLab.
Free API discovery for AI agents; API execution may require USDC payments via x402 on Arc Mainnet.
Free API discovery for AI agents; execution may require USDC/x402 payments on Arc Mainnet.
Does this store deliver and refund? Measured with carriers and payment processors.
Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery.
Remote MCP to publish, search, and get information. x402 v2 required.
Monetization gateway for MCP servers. Agents call a tool, receive an x402 v2 payment challenge, sign a USDC transfer on Base, and get the result. Payment is verified before the tool runs and settled only after it returns, so failed calls are never charged. Discovery and tool listing are free.
Remote MCP for Living Stack offer discovery and buyer-authorized checkout preparation.
Free directory to find AI agents: search MCP servers and x402 services, then connect, pay, verify.
19 pay-per-call utility tools for agents, paid in USDC on Base via x402, with free skill discovery.
Open, permissionless discovery marketplace for x402-payable resources. No account or KYC required.
Pay-per-call US brand evidence and signal workflows with free MCP discovery and x402 payments.
