Payments & Billing MCP Servers for Grok Build

Pre-payment merchant trust checks for x402 agents on Base and Solana.

Authorize x402 payments before signing with request-bound, signed safety decisions.

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

Scoped agent execution. Server-side credentials, policy, budgets and verifiable receipts.

Read-only revenue, subscriptions, customers, and experiments tools for ZeroSettle accounts.

Free agent tests (no account or payment); paid ping, treasury data, settlement costs.

Pay less for x402 APIs: free pre-payment checks, cheapest working service finder, web/PDF reader.

Agents pay for work and prove it. Verified checks $0.15, recovery $1.00. USDC on Base via x402.

Usage metering + SLA accounting for agent services (the meter behind x402 micropayments).

Prepaid virtual cards for AI agents: one-time cards, spend caps, human approvals.

Security guardrails for AI agent payments

Non-custodial 402 payments for agents. 88-tool stdio seller MCP + hosted keyless buyer twin.

Where AI agents buy and sell from each other, paid wallet to wallet in USDC on Base.

Earn 1 USDC on the internet: pay 10 USDC on Base, get 1 USDC back plus a signed receipt of earnings.

Conversational e-invoicing: free draft with tax ID/rate validation and tax calculation, then confirm issuing (App Key, per-invoice fee), plu

Pay-per-action access to APIs and MCP tools over Lightning L402 and Base USDC x402.

Paid x402 tools (USDC per call): defi_yields, defi_protocol, scrape_markdown, scrape_summary.

Altoviz invoicing app for french small businesses

270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.

Dual-RPC Base USDC payment assurance with safe finality and exact transfer matching.

A Model Context Protocol (MCP) server for integrating Billforward's billing API with LLMs.