Express middleware for accepting payments in euros from humans via Stripe and USDC from AI agents via x402 on a single endpoint
Stage
Not given
Not given
Founded
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Based in
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DE
Pricing model
Free
Freemium
Pricing
Free alpha access with no payment method required.
Free core under Apache 2.0 license with both payment methods and Express integration. Pro Early Bird: 49 € including 19% VAT, one-time fee for 1 project, then 79 € (includes quotas, CSV payment log, webhook reconciliation, 12 months updates and support, delivery within 3 weeks or full refund). Team:
Key features
EU VAT calculation with official TEDB rates
37 merchant-friendly tax classes
SME threshold lookup for all 27 EU member states
Source profiles for multi-store management
OSS/IOSS reporting workflows
Transaction tracking and export
Scoped API keys and 2FA security
Single endpoint accepts both euro payments via Stripe and USDC payments via x402
Time-limited access model for human users paying in euros
Per-request billing for AI agents using USDC on x402
Cryptographic payment verification without holding funds
Local demo mode without accounts or real payments
Open source core under Apache 2.0 license
Works with Base Sepolia testnet and Stripe test mode
What makes it different
Designed for EU VAT depth with TEDB-backed rates and curated merchant classes
Time-aware calculations with recorded rate windows for audit review
Audit-friendly compliance flow with transaction evidence and source tracking
Includes SME thresholds for all 27 member states
Roadmap includes e-commerce platform integrations
Unified payment solution for both human users and AI agents from a single endpoint
Funds go directly to your accounts; Meterdoor never touches the money
Open source core provides transparency and no ongoing licensing costs
Ready for production with AI agents despite their current low payment volume
Local testing without creating accounts or handling real money
VAT Engine
Meterdoor