x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/107`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-call API endpoints across data analytics, AI/ML inference, finance, and utility categories, all settled on the Base network using USDC via the x402 protocol.
The specific endpoint listed here is described by the provider as "Premium API Access" and accepts HTTP POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a timeout of 300 seconds. The asset contract is the canonical Base USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`).
Documentation is extremely sparse — the docs, pricing, API, 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 live (returns a valid 402 challenge), but without documentation it is unclear what data or functionality is provided beyond the generic label "Premium API Access."
Capabilities
Use cases
- —Retrieving Stripe invoice data via a single paid API call
- —Programmatic access to invoice #107 details without API key management
- —Agent-driven invoice lookups settled in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call access to invoice data
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Anyone needing documented request/response schemas before integration
- —Bulk invoice retrieval or batch processing (single-resource endpoint)
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/107
# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the purpose of this specific invoice endpoint is unclear beyond its generic label. The listing is effectively a stub.
Warnings
- —No documentation available — all doc/pricing/API pages render only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —Purpose of '/api/v1/stripe/invoices/107' is unclear — 'Premium API Access' is a generic label with no detail on what data is returned
- —No examples of successful responses available
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/107
- —The provider advertises $0.02 per request pricing across all endpoints with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/107
- —Docs, pricing, API, and README pages all render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs