x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment wall. It is part of a broader platform offering pay-per-request APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories — all settled on the Base network using USDC.
The specific endpoint `/api/v1/stripe/invoices/2` accepts POST requests and is gated by an x402 exact-payment scheme. The maximum amount required is 20,000 base units of USDC (0x8335…on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json.
The platform advertises a uniform $0.02/request pricing model with no API keys, no rate limits, and instant access. However, the crawled documentation pages (docs, api, pricing, README) all returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schema for this Stripe invoices endpoint is unknown. It is unclear what data this endpoint returns — the name suggests it may relate to Stripe invoice retrieval or creation, but no documentation confirms the request body format or response structure.
Capabilities
Use cases
- —Retrieving or creating Stripe invoice data via a pay-per-call model
- —Integrating invoice functionality into agent workflows without API keys
- —Programmatic access to Stripe invoice operations settled in USDC on Base
Fit
Best for
- —Agents needing keyless, pay-per-request access to invoice-related data
- —Developers who prefer crypto micropayments over traditional API subscriptions
- —Workflows requiring on-demand Stripe invoice interactions without rate limits
Not for
- —Users who need detailed API documentation before integrating
- —High-volume use cases where per-request pricing may add up compared to flat-rate plans
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/2 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no request/response schema, and no examples available — the docs, pricing, and README pages all render only a wallet-connect prompt. The actual functionality of the Stripe invoices endpoint is opaque.
Warnings
- —No API documentation available — all doc pages return only 'Connect wallet' with no content
- —Request body schema and response schema are completely unknown
- —The purpose of '/api/v1/stripe/invoices/2' is unclear — it may involve Stripe invoice data but this is unconfirmed
- —No OpenAPI spec or AI plugin manifest found
Citations
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge requires maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeouthttps://lowpaymentfee.com/api/v1/stripe/invoices/2
- —Documentation, pricing, API, and README pages all returned only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs