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" behind an x402 payment challenge. It is part of a broader platform offering pay-per-request APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories — all priced at $0.02 per call, settled in USDC on the Base network.
The specific resource `/api/v1/stripe/invoices/26` appears to be a Stripe invoice-related endpoint. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…0913 on Base, 6 decimals = $0.02) to the payTo address 0x1A2B…85F3. The challenge specifies x402 version 1, scheme "exact", with a 300-second timeout and JSON response MIME type.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the invoice endpoint actually returns. The platform advertises no API keys, no rate limits, and instant access, but the actual behavior and output of this particular endpoint remain undocumented.
Capabilities
Use cases
- —Retrieving Stripe invoice data via a per-request micropayment model
- —Integrating pay-as-you-go invoice lookups into agent workflows
- —Accessing financial data without API key management
Fit
Best for
- —Agents needing on-demand Stripe invoice data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs
- —Low-volume consumers who prefer per-call pricing over monthly plans
Not for
- —High-volume invoice processing where per-call costs add up
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/26 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual purpose and output of the /stripe/invoices/26 resource is unclear.
Warnings
- —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —No request or response schema provided; the actual data returned by this endpoint is unknown.
- —The endpoint path references a specific invoice ID (26), which may indicate a demo or placeholder rather than a general-purpose API.
- —No OpenAPI or ai-plugin manifest discovered.
Citations
- —The endpoint returns a 402 challenge with x402 version 1, scheme exact, maxAmountRequired 20000 USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/26
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/invoices/26