x402-gated premium API access on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. 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 are pay-per-request with no API keys, no rate limits, and instant access, settled on the Base network using USDC.
The specific endpoint `/api/v1/stripe/subscriptions/163` is labeled "Premium API Access" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). It accepts POST requests and returns JSON. The x402 challenge is live and uses the "exact" payment scheme on the Base network, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
However, the actual functionality behind this specific endpoint is unclear. The name "Premium API Access" and the path segment "stripe/subscriptions/163" suggest it may relate to subscription management or a Stripe integration, but no documentation, request/response schema, or usage examples are available. The platform's docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. Without knowing what this endpoint actually does beyond its label, agents should treat it as an opaque paid endpoint with uncertain functionality.
Capabilities
Use cases
- —Paying for premium API access on-demand without API keys
- —Integrating x402 micropayment-gated endpoints into agent workflows
- —Accessing paid services on the Base L2 network using USDC
Fit
Best for
- —Agents that support x402 payment protocol on Base
- —Users who want keyless, pay-per-request API access
- —Crypto-native workflows settling in USDC
Not for
- —Users who need detailed documentation or known response schemas before purchasing
- —Anyone requiring fiat-only payment methods with no crypto wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/163 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no clarity on what the endpoint actually does. The docs, API, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —The actual functionality of this specific endpoint (/api/v1/stripe/subscriptions/163) is unknown; the label 'Premium API Access' is vague.
- —No request or response schema is provided; agents cannot know what to send or what they will receive.
- —The path includes 'stripe/subscriptions' which may imply subscription management, but this is unconfirmed.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/163
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/163
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs