Payments & Billing MCP Servers for Grok Build

Manage Invoice Ninja clients, invoices, quotes, expenses, tasks and projects.

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.

Invoices, proposals and payments for contractors. Bilingual (ES/EN). Sign in with ManosPay.

Open-source EIP-2612 Permit-based wallet sessions for AI agents using MCP.

Pay-per-call agent tools over x402 (USDC on Base) — no signup or API key.

Place overdue B2B invoices for collection and track outreach, payments and remittances.

Shopify usage billing guard: App Events idempotency, retry risk, and cycle reconciliation.

Discover and pay for services from the Nevermined Catalog using a spend-capped budget.

Connect your AI assistant to NexPay to view payments, contacts, commissions, and exchange rates.

x402 paid content and Nib Tips with pending holds, refunds, public ledger, pricing, and reputation.

Escrow for AI-agent jobs: money is held until the work passes checks both agents signed.

Derive an invoice-match threshold.

Romania payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

MCP server for Sherweb — billing, subscriptions, customers, and product catalog.

Machine-native tools for autonomous agents with free routing and x402 USDC pay-per-call.