x402-gated Stripe invoice endpoint on Base, paying per-request in USDC.
What it does
This endpoint at lowpaymentfee.com exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/114`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-request 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 returns a Stripe invoice (invoice ID 114) as JSON. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.
Documentation on the site 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 spec, no example request/response documentation, and no detail on what the invoice payload actually contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know exactly what data is returned beyond the generic "Premium API Access" label.
Capabilities
Use cases
- —Retrieving Stripe invoice data without traditional API key authentication
- —Programmatic access to invoice records via crypto micropayment
- —Agent-driven invoice lookup settled in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-request access to invoice data
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Bulk invoice retrieval or batch processing (no documented batch endpoint)
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X GET https://lowpaymentfee.com/api/v1/stripe/invoices/114 \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent—every doc page renders only 'Connect wallet'. There is no OpenAPI spec, no example responses, and no description of what the invoice payload contains. The listing is effectively a stub with confirmed liveness and pricing.
Warnings
- —Documentation pages (docs, API, pricing, README) all return only a 'Connect wallet' prompt with no content
- —No OpenAPI or schema describing the response payload
- —The specific resource '/api/v1/stripe/invoices/114' appears to be a single hardcoded invoice rather than a parameterized endpoint
- —No information on what fields the invoice JSON contains
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/114
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/114