Payments & Billing MCP Servers for Grok Build

Search Checkout.com docs and API reference, plus manage payments, refunds, and payment links.

Pay-per-call tx explainer, DeFi yields, token safety, SEC 8-K and OFAC data via x402 (USDC on Base).

Draft UK vehicle sales invoices from supplied deal facts, with totals and a private review link.

GET https://delvorn.site/api/x402/test-asset $0.05 Base. First independent=Certified+$0.05 back.

Generate & validate EN 16931 e-invoices (Factur-X, ZUGFeRD, XRechnung); verification certificates

ARCA electronic invoices (formerly AFIP) for Argentina: CUIT registration, invoices with CAE, PDF and email.

Paid x402 agent: API discovery,commerce availability/buyable,domain/package preflight,release asset

Hosted x402 preflight for action authority, payment mandate, destination, expiry and replay.

Invoicing tools for AI assistants: clients, draft invoices with computed tax, and email sending.

x402 pay-per-call agent tools (Base USDC): web search, URL extract, OCR, Base tx & allowance scans

Compare paid agent endpoints (x402 + MCP) on price, uptime and real usage before you pay.

Paid tools for AI agents over x402: privacy scan, payment-address check, locks, seller marketplace

Look up invoices, estimates, and customers. Save a draft. Nothing is sent.

Read Invoiced customers, invoices, payments, subscriptions; create customers, draft invoices, notes.

Invoice PDFs, scans and photos to Excel, with the math checked: fields, line items and totals.

Instant x402 spend-cap pack for agents. get_quote then buy_intel_pack 5 USDC Base. No human.

ToolGuard paid gate decisions and attestation lookup. Customer API key required. Limited beta.

Pay for HTTP APIs and charge for your own: x402 micropayments in USDC on Base.

Compute and verify prices from an agent, metered per call. Works keyless on a demo tenant.

Create invoices, quotes, receipts and credit notes with GST or VAT, as prefilled links or PDFs.

Checks an electronic invoice (Factur-X, UBL, CII), a SIREN/SIRET number, a VAT number; explains a rejection.