"A design and prototyping tool - Figma" matching MCP servers:

Credit and payments for AI agent developers — over MCP. No crypto required

x402-trust gives AI agents a "check before you pay" layer for the x402 ecosystem.

Create free, no-signup invoices from your AI assistant — the create_invoice tool returns a link that opens blankinvoicemaker.com pre-filled, ready to download as a watermark-free PDF.

MCP server for real FDM 3D-printing slicing, quoting, and design-for-manufacturability analysis via the FabTally API, supporting 12 printer profiles and 12 materials. Includes free discovery/printability tools and paid slice/quote/orientation tools settled via x402 (USDC on Base).

Enables MCP clients to access all endpoints of an x402 gateway by paying real-time microtransactions (USDC on Base) per API call, with automatic tool discovery and spend guardrails.

MCP server that gives Claude/GPT agents commerce tools — each tool call pays an upstream x402 endpoint and returns its artifact.

Enables individual proprietors and freelancers to manage daily accounting tasks like journal entries, invoice creation, and monthly reconciliation through simple tool calls, using freee's API.

Enables interaction with the Crowns game API as MCP tool calls, including x402-based payments.

agenticpay lets MCP server developers monetize tools via per-call USDC micropayments on Solana, using the x402 protocol. Each tool declares a price; agents pay via signed Solana transactions; settlement happens on-chain in ~1.5–2 seconds.

Generic Lightning-paywall sidecar that wraps any stdio MCP server and requires a paid Lightning invoice (via NWC) before forwarding priced tool calls. Per-tool prices are set via env; includes payment verification, replay protection, and an audit log — the upstream server stays untouched.

Pay per MCP tool call in USDC on Base. Non-custodial settlement, no admin keys, 30 bps fee.

Enables existing MCP clients to access paid MCP servers by signing x402 payments locally and proxying tool calls, with automatic line management, retries, and spend limits.

Enables MCP tool developers and AI agents to track payments, calculate sales tax liability, and ensure tax compliance across US jurisdictions.

Proxies an existing MCP server to add an x402 paywall, charging AI agents per tool call without modifying the upstream server.

Enables AI agents to pay-per-call for Cloudflare Worker APIs using USDC micropayments, with automatic MCP tool discovery and Bazaar listing.

Enables AI agents to accept payments in Mexico via Mercado Pago, including OXXO cash vouchers, SPEI bank transfers, cards, and Mercado Pago wallet, through a stateless hosted checkout.

Enables AI agents to discover and interact with a merchant's commerce layer, including product listing and checkout creation, while payments settle directly to the merchant's Stripe account.

A remote MCP server that enables AI agents to accept Japanese payments (konbini, credit cards, PayPay, etc.) via KOMOJU's hosted checkout.

RailRouter Lite is a real, production-ready MCP server implementing the Model Context Protocol. It exposes one tool: route_payment. This tool intelligently routes payments to the optimal rail (Stripe MPP, Coinbase x402, or Google AP2) in real time, choosing based on cost, latency, and success rate. Every decision is logged to a Cloudflare D1 database, creating compounding routing intelligence

A template for MCP servers that enforces a paywall gate, offering free local execution and monetizing premium features via Stripe or x402 payments.