x402-gated Stripe invoice endpoint on Base, paying per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 11) behind an x402 payment wall. The provider operates a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 protocol on the Base network and settled in USDC.
The specific endpoint `/api/v1/stripe/invoices/11` is described by the provider simply as "Premium API Access." The x402 challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, and settles to a wallet on Base. The asset address matches Base-native USDC. No API keys or rate limits are advertised; access is granted purely through on-chain micropayment.
Documentation is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no explanation of what data this particular invoice endpoint returns. The broader site lists many endpoints at $0.02 each but provides no technical documentation for any of them. Without further details it is unclear what payload to send or what response to expect from this specific route.
Capabilities
Use cases
- —Retrieving Stripe invoice data via a single micropayment without API key registration
- —Programmatic access to invoice information settled on-chain in USDC
- —Agent-driven invoice lookup with per-call payment on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use access to invoice data
- —AI agents that can settle x402 payments on Base in USDC
- —Users who prefer on-chain micropayments over subscription billing
Not for
- —Anyone needing detailed API documentation or request/response schemas before integrating
- —High-volume invoice processing where $0.02 per call adds up significantly
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/11 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no explanation of what the endpoint actually returns. Docs pages are empty beyond a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or request/response schema provided; it is unknown what payload to POST or what the response looks like.
- —The endpoint path suggests a single Stripe invoice resource (ID 11); unclear if this is a demo or production resource.
- —The description 'Premium API Access' is generic and does not explain the endpoint's actual functionality.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/invoices/11
- —The provider lists endpoints at $0.02 per request with no API keys, no rate limits, and instant access on Basehttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is Base-native USDChttps://lowpaymentfee.com/api/v1/stripe/invoices/11
- —Docs, API, pricing, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs