x402-gated Stripe invoice endpoint on Base, paid per-call in 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/193`) suggests it returns or processes a Stripe invoice identified by ID 193. 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 (maxAmountRequired of 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 data feeds, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific endpoint listed here is under the Stripe invoices path, which is not among the publicly documented API categories on the landing page. No OpenAPI schema, detailed request/response documentation, or usage examples were found for this particular endpoint. The docs, pricing, and API pages all rendered only a wallet-connect prompt with no additional content.
Capabilities
Use cases
- —Retrieving or processing a specific Stripe invoice via a pay-per-call model
- —Programmatic invoice access without API key management
- —Agent-driven invoice retrieval settled in USDC on Base
Fit
Best for
- —Agents or services that need on-demand Stripe invoice data without subscription overhead
- —Developers experimenting with x402 payment-gated APIs
- —Crypto-native workflows that prefer USDC micropayments over traditional billing
Not for
- —Bulk invoice processing requiring thousands of calls (no documented batch endpoint)
- —Users who need detailed API documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/193 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, no documentation beyond a wallet-connect page, and the specific /stripe/invoices/193 path is not listed among the provider's advertised APIs. Effectively a stub listing.
Warnings
- —No OpenAPI or request/response schema available for this endpoint
- —The /api/v1/stripe/invoices/193 path is not listed among the provider's publicly documented APIs — it may be a test or internal resource
- —Docs, pricing, and API pages returned only a wallet-connect prompt with no substantive content
- —No information on what request body (if any) the POST expects or what the response contains
Citations
- —The x402 challenge requires up to 20,000 base units of USDC (0.02 USDC) on the Base networkhttps://lowpaymentfee.com/api/v1/stripe/invoices/193
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/193
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The landing page lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com