x402-gated premium API access on Base, paid per-request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is part of a broader platform offering multiple API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network and settled in USDC.
The specific endpoint `/api/v1/stripe/subscriptions/129` is listed as "Premium API Access" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment authorization, and the endpoint processes the request upon valid payment. The asset used is USDC on Base (contract 0x8335…2913), and the payment recipient is 0x1A2B…85F3. The timeout for payment settlement is 300 seconds.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what "Premium API Access" actually returns or what input it expects beyond being a POST endpoint. The platform advertises no API keys, no rate limits, and instant access, but the actual functionality behind this particular subscription endpoint is unclear.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with per-call USDC micropayments
- —Agent-driven API consumption without API keys or subscriptions
- —Integrating x402-compatible payment flows into automated workflows
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need keyless, pay-per-call API access on Base
- —Low-volume consumers who prefer micropayments over subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —High-volume consumers who would benefit from bulk pricing or traditional subscriptions
- —Anyone needing clarity on what the endpoint actually returns before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/129 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live (returns a valid 402 challenge), but there is zero documentation on what the endpoint actually does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The listing is effectively a stub with only pricing and payment metadata available.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or input/output schema provided; unclear what 'Premium API Access' actually delivers
- —The endpoint path '/api/v1/stripe/subscriptions/129' suggests a Stripe subscription resource, but no details on what subscription or service it represents
- —No request or response examples available anywhere in the crawl
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/129
- —The platform advertises $0.02 per request 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/subscriptions/129
- —Documentation pages (docs, api, pricing, README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs