x402-gated Stripe subscription endpoint on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/stripe/subscriptions/200`. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 payment protocol on the Base network using USDC.
The specific endpoint probed here costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme: callers attach an `X-PAYMENT` header with a signed payment to the wallet `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The endpoint accepts HTTP POST and returns `application/json`. No API keys or rate limits are advertised; the platform's tagline is "pay only for what you use."
Documentation is extremely thin — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what the `/stripe/subscriptions/200` endpoint actually returns or what input it expects. The endpoint name suggests it may relate to Stripe subscription management, but this is speculative. The platform lists many other endpoints (sentiment analysis, summarization, geocoding, etc.) at the same $0.02 price point, but none have documented schemas either.
Capabilities
Use cases
- —Programmatic Stripe subscription management via x402 micropayments
- —Agent-driven API access without traditional API key provisioning
- —Paying per-call for premium data or subscription operations on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call API access settled in USDC on Base
- —AI agents that can sign x402 payments autonomously
- —Users who prefer crypto micropayments over traditional subscription billing
Not for
- —Anyone needing documented request/response schemas before integration
- —High-volume use cases where per-call pricing at $0.02 adds up significantly
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/200 \
-H "X-PAYMENT: <x402-signed-payment>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/call in USDC on Base), but there is zero documentation on what the endpoint does, what inputs it accepts, or what it returns. No OpenAPI spec, no examples, no request/response schemas. The docs pages are empty wallet-connect stubs.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; impossible to know what this endpoint actually does or expects
- —The endpoint path suggests Stripe subscription functionality but this is unverified
- —The broader platform lists many endpoints but none appear to have documented behavior
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/200
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/200
- —Docs, pricing, API, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs