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/195`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated via the x402 protocol on the Base network and settled in USDC.
The specific endpoint listed here is described only as "Premium API Access" and returns a Stripe invoice resource. The x402 challenge confirms it is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (0x8335…on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data the invoice endpoint actually returns or what input parameters it accepts. The landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and instant access. However, the specific behavior and schema of this particular Stripe invoices endpoint remain undocumented.
Capabilities
Use cases
- —Retrieving or triggering a Stripe invoice via a single paid API call
- —Programmatic invoice access without traditional API key management
- —Agent-driven payment workflows where per-call USDC settlement is preferred
Fit
Best for
- —Developers wanting keyless, pay-per-use API access settled in USDC on Base
- —AI agents that can handle x402 payment challenges natively
- —Users needing Stripe invoice data without maintaining Stripe credentials
Not for
- —Production use cases requiring documented request/response schemas
- —High-volume invoice processing where per-call fees add up
- —Users who need fiat-only payment rails with no crypto involvement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/195
# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof to access.Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what this Stripe invoice endpoint actually does or accepts. Effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all render only a wallet-connect prompt
- —No OpenAPI or input/output schema provided for this endpoint
- —The purpose and behavior of '/api/v1/stripe/invoices/195' is unclear — 'Premium API Access' is not descriptive
- —No example requests or responses available anywhere in crawled content
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/195
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/195
- —Flat pricing of $0.02 per request across all endpoints, no API keys, no rate limitshttps://lowpaymentfee.com
- —The provider offers APIs across data analytics, AI/ML, finance/crypto, and infrastructure categorieshttps://lowpaymentfee.com