Pay-per-call Stripe invoice creation endpoint on Base via x402, settled in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" service specifically at the path `/api/v1/stripe/invoices/60`. It is part of a broader platform offering dozens of pay-per-request API endpoints across data analytics, AI/ML, finance, infrastructure, and utility categories — all gated by the x402 payment protocol on the Base network using USDC.
The specific endpoint probed here accepts POST requests and returns `application/json`. Based on the URL path (`/stripe/invoices/60`), it likely relates to Stripe invoice operations (creation or retrieval for invoice ID 60), though the platform's own documentation is extremely sparse and does not describe request/response schemas for individual endpoints. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints.
The platform advertises no API keys, no rate limits, and instant access. Payment is handled entirely through the x402 protocol: callers attach an `X-PAYMENT` header with a signed USDC payment on Base. The payTo address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the accepted asset contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` (USDC on Base). No OpenAPI spec, detailed docs, or example payloads were found.
Capabilities
Use cases
- —Creating or retrieving Stripe invoices via a pay-per-call model without API key management
- —Integrating invoice operations into agent workflows that settle payments on Base L2
- —Programmatic invoice access where traditional Stripe API key provisioning is undesirable
Fit
Best for
- —Agents or bots needing on-demand Stripe invoice access without subscription overhead
- —Developers experimenting with x402 payment-gated APIs on Base
- —Low-volume invoice operations where $0.02/call is cost-effective
Not for
- —High-volume Stripe operations where direct Stripe API access would be cheaper
- —Use cases requiring detailed Stripe API features (webhooks, subscriptions, etc.) beyond what this wrapper exposes
- —Users who need comprehensive API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/60 \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) with clear pricing ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual functionality behind the endpoint path is inferred from the URL alone.
Warnings
- —No OpenAPI spec or request/response schema available — actual endpoint behavior is unknown
- —Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no useful content
- —The endpoint's exact functionality (invoice creation vs. retrieval vs. other) is inferred solely from the URL path
- —No examples of successful responses are available
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/60
- —The platform advertises $0.02/request flat pricing 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/60