APIs & SDKs
Meterdoor
Express middleware for accepting payments in euros from humans via Stripe and USDC from AI agents via x402 on a single endpoint
- 0community votes
- 0DR by Ahrefs no change since last check
Ahrefs Domain Rating listed 11 Nov 2026, relisted 8 Nov 2026.
Open-source Express middleware that lets a single API endpoint accept euro payments from users via Stripe and USDC payments from AI agents via the x402
What it is
Meterdoor: the homepage
Meterdoor is an open-source Express middleware that enables a single API endpoint to accept payments from both humans and AI agents simultaneously. Humans pay in euros through Stripe Checkout, while AI agents pay in USDC stablecoins using the x402 protocol. The software runs on your own server, with euro payments going directly to your Stripe account and USDC payments to your wallet; Meterdoor never handles or holds the funds.
The middleware supports two payment models: time-limited access for browser users who pay once in euros to access an endpoint for a configured duration, and per-request billing for agents who pay USDC for each query. Both payment methods use cryptographic verification and support repeated requests without double-charging.
Meterdoor is available as a free, open-source core under the Apache 2.0 license, with a Pro tier in presale offering quotas, payment logging, webhook reconciliation, updates and email support. The core is currently in prototype stage, tested on the Base Sepolia testnet and Stripe's test mode.
Listed capabilities
- 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
Pricing
Pricing model: Freemium
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:
Follow Meterdoor for an email about each milestone, update and new product they post, in a daily summary.
Meterdoor metrics
| Metric | Value |
|---|---|
| Domain Rating | 0 no change since last check |
| Trust Flow | 0 no change since last check |
| Citation Flow | 0 no change since last check |
| Referring domains | 0 no change since last check |
| External backlinks | 0 no change since last check |
Ahrefs Domain Rating listed 11 Nov 2026, relisted 8 Nov 2026. Majestic listed 8 Nov 2026, relisted 8 Nov 2026. Link data listed by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Meterdoor domain listing data
Show the listing data
| Domain age | 20 days |
|---|---|
| Registered | |
| Expires | |
| Registrar | RegistryGate GmbH |
| DNSSEC | Not signed |
Meterdoor launch receipt entry
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 0 to 0 no change since launch 8 Nov 2026, then 11 Nov 2026 |
| Trust Flow (Majestic) | 0 first measured 8 Nov 2026 |
| Referring domains (Majestic) | 0 first measured 8 Nov 2026 |
Day 3 since launch. Next receipt: day 30, 8 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
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Quick answers
Is this a payment service?
No, it is software that runs on your own server. Euro payments go through your own Stripe account and USDC payments go directly to your own wallet, processed via Stripe or your chosen x402 facilitator. Meterdoor never sees or touches your money.
What is x402?
It is an open protocol based on HTTP status code 402. A program or AI agent receives a machine-readable payment request, pays in stablecoins (usually USDC on Base), and calls the resource again. Payment verification is handled by an x402 facilitator of your choice.
When will Pro be delivered?
Within three weeks of your payment, via email to the address from the payment process. If delivery is late, a full refund is issued.
What operating costs are there beyond the license?
Stripe charges its standard fees on your account. For x402, network or facilitator fees may apply depending on your chosen facilitator. There are no ongoing costs from Meterdoor.
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