x402-gated Stripe invoice endpoint on Base, pay $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource (invoice ID 43). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories — all gated behind x402 payment challenges settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/invoices/43` is labeled "Premium API Access" by the provider. The x402 challenge confirms it is live, accepting POST requests, and requires up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme to wallet 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json.
The platform advertises a flat $0.02/request pricing model with no API keys, no rate limits, no minimums, and instant access. However, documentation pages (docs, api, pricing, README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, request schema, and response format of this specific invoice endpoint are unknown. There is no OpenAPI spec, no ai-plugin manifest, and no robots.txt or agents.txt. The endpoint's purpose — whether it retrieves a Stripe invoice, creates one, or performs some other action — cannot be confirmed from available materials.
Capabilities
Use cases
- —Retrieving or interacting with Stripe invoice data via a crypto-settled micropayment
- —Programmatic invoice access without traditional API key registration
- —Agent-driven payment workflows that settle in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call access to invoice data
- —AI agents with x402-compatible wallets on Base
- —Prototyping crypto-settled API payment flows
Not for
- —Production Stripe integrations requiring full Stripe API feature coverage
- —Users who need detailed documentation or OpenAPI specs before integrating
- —High-volume batch invoice processing where per-call fees add up
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/43 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of the 'stripe/invoices/43' endpoint is opaque. All doc pages return only 'Connect wallet' with no content.
Warnings
- —No OpenAPI spec or schema available — request and response formats are unknown
- —All documentation pages (docs, api, pricing, README) are empty beyond a 'Connect wallet' prompt
- —The specific purpose of /api/v1/stripe/invoices/43 is unclear — it may be a demo or placeholder
- —No agents.txt or robots.txt found
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/43
- —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/43