Payments & Billing MCP Servers for Grok Build

76 pay-per-call APIs for AI agents: market, company, weather and dev tools, paid via x402 on Solana.

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

23 agent tools via x402: crypto data, tx checks, web fetch. MCP pays Base USDC; HTTP adds 3 rails.

Preview the month's billing from approved time, retainers and progress, then draft invoices to send

Review invoice records, flag duplicates, validate totals, and prepare spreadsheet-safe CSV.

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

Non-custodial x402 payments between AI agents on Solana. Returns unsigned transactions.

21 AI APIs pay-per-call with USDC on Base via x402. No keys, no signup.

minia2a.uk — hosted MCP over streamable HTTP: call 1,600+ x402 pay-per-call APIs, USDC on Base.

Read Oblio clients, products and documents; create proformas, issue, collect and cancel invoices.

Inspect payment policy, retrieve and verify receipts, or create post-payment observation receipts.

Invoice tools: reminders, late fees, terms, timesheets and a receivables health report (x402).

Free hosted MCP for invoices, estimates, clients, items and PDFs. OAuth authorization required.

Free, non-custodial tools to validate bounded USDC/USDT payout plans and reconcile payouts.

RevRule by Payload: read entitlement graphs, review payout evidence, dry-run revenue events.

RFC 3161 timestamps, paid per call over x402. No account; verifies offline against the authority.

Manage a ScaledThought account: API keys, budgets, usage and prepaid top-ups. Needs an API key.

Agent payment readiness and AI visibility checks, $1 per call over MPP or prepaid credits.

x402 USDC-paid MCP tools: 7-chain transaction checks, PDF evidence and DNS/TLS audits.

Read SmartBill series, taxes, stock, clients and products; draft and issue invoices and estimates.

Reads invoices and receipts from PDF to JSON and checks the math. $0.04/page via x402.