Express middleware for accepting payments in euros from humans via Stripe and USDC from AI agents via x402 on a single endpoint
Connect software to licensed e-invoicing providers through one API
Stage
Not given
Not given
Founded
Not given
Not given
Based in
DE
GR
Pricing model
Freemium
Freemium
Pricing
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:
Sandbox: Free. Launch: €49/month (up to 1,000 documents). Pro: €199/month (up to 10,000 documents). Scale: from €599/month (up to 100,000 documents). Enterprise: pricing on request (above 100,000 documents). Prices in EUR, excl. VAT.
Key features
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
Preview documents before issuing
Webhook notifications for document status changes
Safe idempotent retries
Credit notes and document corrections
MCP server for AI agents
REST API with comprehensive operations
Document status tracking
Provider error reporting with tax authority feedback
What makes it different
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
Connects to licensed providers the business already uses
Safe idempotent API calls prevent duplicate documents
AI agents can issue documents via MCP without credentials exposure