x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to a Stripe invoice resource (invoice ID 112) via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments on the Base network.
The specific endpoint `/api/v1/stripe/invoices/112` accepts POST requests and charges 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call. Payment is made via the x402 exact-payment scheme: callers include an X-PAYMENT header with a signed payment authorization, and the server settles on-chain to the payTo address. No API keys, rate limits, or upfront commitments are required — access is purely pay-per-use.
The platform advertises a uniform $0.02/request pricing across all its endpoints. Documentation pages (/docs, /pricing, /README) appear to require a wallet connection and returned no substantive content during crawl, so the actual response schema and detailed behavior of this invoice endpoint are unknown. The endpoint is confirmed live (402 challenge captured), but what data it returns beyond "Premium API Access" is not documented in the crawl material.
Capabilities
Use cases
- —Retrieving Stripe invoice data for invoice #112 via a single micropayment
- —Programmatic access to invoice information without traditional API key management
- —Agent-driven payment flows where an AI agent pays per call on Base
Fit
Best for
- —Developers experimenting with x402 micropayment protocols
- —Agents that need on-demand invoice data without subscription overhead
- —Use cases requiring keyless, pay-as-you-go API access on Base
Not for
- —Bulk invoice retrieval or batch processing (pay-per-call adds up)
- —Users who need detailed API documentation or response schema guarantees before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/112 \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no response examples, and all documentation pages returned only a wallet-connect prompt with no content. The purpose of this specific invoice endpoint is opaque — it is unclear what data it returns or what POST body it expects.
Warnings
- —Documentation pages (/docs, /pricing, /README) returned no usable content — only a wallet-connect prompt.
- —No request body schema or response schema is available; callers cannot know what to send or what to expect.
- —The endpoint path references a specific Stripe invoice ID (112); it is unclear whether this is a demo, a fixed resource, or parameterizable.
- —The broader platform lists many endpoints but none have documented schemas in the crawl material.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 (=$0.02).https://lowpaymentfee.com/api/v1/stripe/invoices/112
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/stripe/invoices/112