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. The specific resource path (`/api/v1/stripe/invoices/148`) suggests it returns or processes a Stripe invoice record (invoice #148). Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring up to 0.02 USDC per request (20,000 base units at 6 decimals). The endpoint accepts HTTP POST and returns application/json.
The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto market data, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, this specific listing is for the Stripe invoices endpoint only. Documentation pages on the site are largely empty (showing only a "Connect wallet" prompt), so the exact request body schema and response format for this endpoint are unknown.
The endpoint is live: the probe received a proper HTTP 402 x402 challenge with version 1 headers. The payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the maximum timeout is 300 seconds.
Capabilities
Use cases
- —Retrieving or processing a specific Stripe invoice via a crypto-paid API call
- —Integrating pay-per-use invoice data into agent workflows without API key management
- —Programmatic access to Stripe invoice records settled on Base L2 with USDC
Fit
Best for
- —Agents or bots that need on-demand invoice data without subscription overhead
- —Developers experimenting with x402 payment-gated APIs
- —Workflows requiring crypto-native pay-per-call access to financial records
Not for
- —Bulk invoice processing requiring thousands of calls (no documented batch endpoint)
- —Users who need detailed API documentation or guaranteed SLAs
- —Non-crypto users who cannot pay with USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/148 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty stubs. The specific purpose of this Stripe invoices endpoint is unclear beyond its name. Effectively a stub listing.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) are all empty — only showing 'Connect wallet'
- —No request body schema or response schema documented for this endpoint
- —The specific function of /api/v1/stripe/invoices/148 (read vs. create vs. process) is unknown
- —No OpenAPI spec or AI plugin manifest available
Citations
- —Endpoint returns HTTP 402 with x402 version 1 challenge requiring USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/148
- —maxAmountRequired is 20000 base units of USDC (0.02 USD at 6 decimals)https://lowpaymentfee.com/api/v1/stripe/invoices/148
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/stripe/invoices/148