x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment challenge. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/stripe/invoices/76` appears to be a Stripe invoice-related resource. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request), consistent with the platform's uniform $0.02/request pricing. Payment is settled on-chain on Base to the specified wallet address. The endpoint accepts POST requests and returns application/json responses.
The platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /api, /README) all returned minimal content (just a "Connect wallet" prompt), so there is no detailed schema or usage documentation available for this or any other endpoint on the platform. Without request/response schemas or examples, the exact functionality of this invoice endpoint remains unclear — it may retrieve or create Stripe invoice data, but this is speculative.
Capabilities
Use cases
- —Programmatically accessing Stripe invoice data via a pay-per-call model
- —Integrating invoice retrieval into agent workflows without API key management
- —Making on-chain micropayments for API access on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —Agents that can settle x402 payments in USDC on Base
- —Use cases requiring low-friction access to invoice data without subscriptions
Not for
- —Users who need detailed API documentation or request/response schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/76 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and the purpose of this specific invoice endpoint is ambiguous. All doc pages returned only 'Connect wallet' with no useful content.
Warnings
- —No API documentation available — all doc pages return only a 'Connect wallet' prompt
- —No request or response schema provided for this endpoint
- —The exact functionality of /api/v1/stripe/invoices/76 is unclear — 'Premium API Access' is a generic label
- —The platform lists many endpoints but none have documented schemas or usage examples
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/76
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/76
- —Documentation pages (/docs, /pricing, /api, /README) returned minimal contenthttps://lowpaymentfee.com/docs