x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 69) via the x402 payment protocol. 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 challenges on the Base network using USDC.
The specific endpoint `/api/v1/stripe/invoices/69` accepts POST requests and returns JSON. Payment is settled on-chain on Base using USDC (contract 0x8335…2913) with an exact-scheme challenge. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing across all endpoints. The payment is directed to address 0x1A2B…85F3 with a 300-second timeout.
The platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /README) appear to require a wallet connection and contain no substantive content when crawled without one. No OpenAPI schema, request/response examples, or detailed documentation about what the Stripe invoices endpoint actually returns were found in the crawl. The endpoint is live and responding with a valid x402 challenge.
Capabilities
Use cases
- —Retrieving Stripe invoice data via a single micropayment without API key registration
- —Programmatic access to invoice information for agents that can settle x402 payments
- —Integrating pay-per-request invoice lookups into automated financial workflows
Fit
Best for
- —Agents or bots that can settle x402 USDC payments on Base
- —Developers wanting keyless, pay-as-you-go access to invoice data
- —Low-volume consumers who prefer per-call pricing over subscriptions
Not for
- —Users who need free or traditional API-key-based access
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/69 \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages require wallet connection, yielding no useful content. The purpose of this specific Stripe invoices endpoint is unclear beyond its title.
Warnings
- —No documentation available — /docs, /pricing, /README all require wallet connection and return no content when crawled.
- —No OpenAPI or schema describing request parameters or response format for this endpoint.
- —The specific purpose and data returned by /api/v1/stripe/invoices/69 is undocumented; 'Premium API Access' is a generic label.
- —This endpoint references Stripe invoices but it is unclear whether it proxies real Stripe data or is a demo/placeholder.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 USDC base units on Base networkhttps://lowpaymentfee.com/api/v1/stripe/invoices/69
- —Platform-wide pricing is $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/69