x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 92) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call API endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/invoices/92` is labeled "Premium API Access" by the provider. The x402 challenge confirms it accepts POST requests, requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02), and responds with `application/json`. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
The platform advertises no API keys, no rate limits, and instant access. However, documentation pages beyond the landing page are gated behind a wallet-connect flow and returned no meaningful content during crawl. There is no OpenAPI spec, no request/response schema documentation, and no examples available, so the actual data returned by this endpoint is unknown. The endpoint is live (402 challenge confirmed), but the lack of documentation makes it difficult to know what payload to send or what response to expect.
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-call access to invoice data
- —AI agents that can settle x402 payments in USDC on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation or request/response schemas before integrating
- —High-volume invoice retrieval where per-call pricing adds up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/92
# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof on Base to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request body schema, no response schema, and all documentation pages are behind a wallet-connect gate yielding no content. The purpose of this specific invoice endpoint is unclear beyond its label.
Warnings
- —No request or response schema available — actual payload structure is unknown
- —All documentation pages (docs, api, pricing, README) are gated behind wallet-connect and returned no content
- —The endpoint path references a specific Stripe invoice ID (92); unclear if this is a demo or a real resource
- —No OpenAPI or ai-plugin manifest found
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/92
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/92
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com