x402-gated premium API access on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform use the x402 protocol for per-request payment, settling in USDC on the Base network.
The specific endpoint at `/api/v1/stripe/subscriptions/136` is labeled "Premium API Access" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per request. Payment is made via the x402 "exact" scheme to a specified wallet address. The endpoint accepts POST requests and returns `application/json` responses.
Notably, the actual functionality behind this particular endpoint path (`/stripe/subscriptions/136`) is unclear — the path suggests a Stripe subscription resource, but the platform's own documentation is extremely sparse (most pages just show "Connect wallet" with no further content). There is no OpenAPI schema, no request/response examples, and no detailed documentation available. The endpoint is confirmed live via a valid 402 challenge, but what data or service it actually returns upon successful payment is not documented in any crawled material.
Capabilities
Use cases
- —Accessing premium API resources with per-call USDC micropayments
- —Agent-driven API consumption without API keys or subscriptions
- —Programmatic access to gated endpoints using x402 protocol
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over traditional API subscriptions
Not for
- —Users needing detailed API documentation or schemas before purchasing
- —Anyone requiring fiat-only payment methods
- —High-volume consumers who need bulk pricing or rate guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/136 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind this specific path is entirely unclear. Most site pages return only 'Connect wallet' with no content.
Warnings
- —No documentation available — all doc/pricing/API pages return only 'Connect wallet' placeholder content
- —The endpoint path '/api/v1/stripe/subscriptions/136' suggests a Stripe subscription resource but its actual functionality is undocumented
- —No OpenAPI schema or request/response examples are provided
- —No input schema is documented; it is unknown what POST body (if any) is expected
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/136
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/136