x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource (`/api/v1/stripe/invoices/48`). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories — all gated behind x402 payment challenges settled in USDC on the Base network.
The specific endpoint listed here returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme to wallet 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. The response MIME type is `application/json`. No API keys or rate limits are advertised; access is instant upon payment.
Documentation on the site 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 Stripe invoice endpoint actually returns or what input parameters it accepts. The platform's landing page lists many other endpoints (analytics, AI, finance, utilities) all at the same $0.02 price point, but none have documented schemas. The endpoint is live and responding with a valid x402 challenge.
Capabilities
Use cases
- —Retrieving Stripe invoice data via a single micropayment without needing an API key
- —Programmatic access to invoice information settled on-chain in USDC on Base
- —Agent-driven invoice lookups where per-call payment replaces subscription billing
Fit
Best for
- —Developers wanting keyless, pay-per-use access to Stripe invoice data
- —AI agents that can settle x402 payments on Base
- —Users who prefer on-chain micropayments over traditional API subscriptions
Not for
- —Users needing detailed API documentation or request/response schemas before integrating
- —High-volume invoice processing where per-call costs would accumulate significantly
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/48
# Returns 402 with x402 challenge; include X-PAYMENT header with signed USDC payment on Base to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it accepts, or what the response looks like. Docs pages are empty ('Connect wallet' only). No OpenAPI schema, no examples, no description of the Stripe invoice resource. Effectively a stub listing.
Warnings
- —No documentation available — all doc/API/pricing/README pages render only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; impossible to know what parameters the endpoint accepts or what it returns
- —The endpoint path references a specific invoice ID (48); unclear if this is parameterized or a fixed resource
- —The broader platform lists many endpoints but none appear to have documented behavior
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)https://lowpaymentfee.com/api/v1/stripe/invoices/48
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages all show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs