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 (invoice ID 86). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance, and utility categories — all gated behind x402 payment challenges settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/invoices/86` accepts POST requests and returns `application/json`. The x402 challenge advertises a max amount of 20,000 base units of USDC (contract `0x8335…2913` on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds. No API keys or rate limits are advertised; access is purely payment-gated.
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 description of what data the Stripe invoice endpoint actually returns. The platform landing page lists many other endpoints (analytics, AI, finance, infrastructure) all at the same $0.02 price point, but provides no detail on input parameters or response formats for any of them. The purpose of fetching a specific Stripe invoice via this endpoint is unclear from available materials.
Capabilities
Use cases
- —Retrieving Stripe invoice data without traditional API key authentication
- —Programmatic access to invoice information via crypto micropayment
- —Agent-driven invoice lookup settled in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use access to Stripe invoice data
- —AI agents that can settle x402 USDC payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Anyone needing detailed API documentation or request/response schemas before integrating
- —Bulk invoice retrieval at scale (no documented batch support)
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/86
# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof on Base to access.Endpoint
Quality
The endpoint is live (402 challenge captured), 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 a Stripe invoice endpoint behind x402 is unexplained. Pricing is clear ($0.02/request) but everything else must be inferred.
Warnings
- —No documentation available — all doc/API/pricing/README pages render only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —Purpose of exposing a specific Stripe invoice (ID 86) via x402 is unclear
- —No information on what data the response contains or what POST body is expected
- —Platform lists many endpoints but none have documented input/output formats
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/invoices/86
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/86
- —Payment timeout is 300 secondshttps://lowpaymentfee.com/api/v1/stripe/invoices/86