x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/115`) behind an x402 paywall. It is part of a broader platform that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all settled on the Base network using USDC.
The x402 challenge confirms the endpoint is live and accepts POST requests. The price per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, using the USDC contract at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The maximum timeout for payment settlement is 300 seconds. No API keys or rate limits are advertised; access is instant upon payment.
The specific functionality of this particular endpoint — retrieving or interacting with Stripe invoice #115 — is not documented beyond the label "Premium API Access". The broader site's docs, pricing, and API pages all render only a wallet-connect prompt with no additional detail. Without a request/response schema or documentation for this specific invoice endpoint, it is unclear what payload to send or what data is returned. The platform appears to be a demonstration or early-stage deployment of x402-based micropayment APIs.
Capabilities
Use cases
- —Retrieving or interacting with a specific Stripe invoice via a crypto-micropayment gate
- —Demonstrating x402 protocol payment flows on the Base network
- —Integrating pay-per-call invoice access into agent workflows without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need keyless, pay-per-request API access on Base
- —Projects exploring crypto-micropayment gated Stripe integrations
Not for
- —Production Stripe invoice management (no documented schema or guarantees)
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume invoice processing where $0.02/request adds up without bulk discounts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/115
# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to access.Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and no explanation of what this specific Stripe invoice endpoint actually returns. The broader site's doc pages are empty wallet-connect stubs.
Warnings
- —No request or response schema available for this endpoint
- —No documentation beyond the label 'Premium API Access' — actual functionality is unknown
- —All doc/pricing/API pages on the site render only a wallet-connect prompt with no content
- —The endpoint references a specific Stripe invoice (#115); unclear if this is a demo or production resource
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/115
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/115