x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 182) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/invoices/182` is labeled "Premium API Access" and accepts POST requests. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the payment details (USDC on Base, payTo address, max amount 20,000 base units = $0.02), and must include a valid X-PAYMENT header to proceed. No API keys or rate limits are advertised; access is gated purely by micropayment.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the invoice endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to know what data or functionality is provided beyond the generic "Premium API Access" label.
Capabilities
Use cases
- —Retrieving Stripe invoice data via a single micropayment without needing an API key
- —Programmatic access to invoice information for agents that can settle x402 payments
- —Demonstrating x402 protocol integration with Stripe billing resources
Fit
Best for
- —AI agents or bots that can autonomously settle x402 USDC payments on Base
- —Developers exploring x402 protocol integrations
- —Use cases requiring keyless, pay-per-call access to invoice data
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume batch invoice processing where per-request micropayments add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/182 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but documentation is effectively nonexistent — every docs/API/pricing page returns only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the endpoint's actual functionality beyond the label 'Premium API Access' is unknown. Pricing is clear ($0.02 USDC on Base) but everything else must be inferred.
Warnings
- —Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content
- —No OpenAPI or JSON schema available — request and response formats are unknown
- —The endpoint path references a specific Stripe invoice ID (182); unclear if this is a demo or a real resource
- —No description of what data the endpoint actually returns
Citations
- —The endpoint returns a 402 challenge with x402Version 1, USDC on Base, maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/stripe/invoices/182
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages render only 'Connect wallet'https://lowpaymentfee.com/docs