x402-gated premium API access on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com is part of a broader suite of x402-protocol APIs covering data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities. The specific endpoint `/api/v1/policies/88` is listed under the title "Premium API Access" and returns a standard x402 payment challenge when called without payment.
The platform advertises a flat $0.02 per request across all endpoints, settled in USDC on the Base network. The x402 challenge confirms this: the `maxAmountRequired` is 20000 base units of USDC (contract 0x8335…2913, 6 decimals), which equals $0.02. Payment is made via the x402 exact scheme with no API keys, no rate limits, and no commitments required. The timeout for payment is 300 seconds.
However, the specific functionality behind `/api/v1/policies/88` is not documented. The site's landing page lists categories like Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, but this particular path does not appear in any of those listings. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no additional content. Without documentation or an example response, it is unclear what data or service this endpoint actually provides when a valid payment is submitted.
Capabilities
Use cases
- —Programmatic access to an undocumented premium API resource via x402 payment
- —Agent-driven pay-per-request workflows on the Base network
- —Testing x402 protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need no-auth, pay-per-call API access on Base
- —Low-cost per-request API consumption without subscriptions
Not for
- —Users who need documented, well-specified API contracts before paying
- —High-volume use cases where per-request pricing may add up without bulk discounts
- —Anyone requiring detailed response schemas or SLA guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/88 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, the specific functionality of /api/v1/policies/88 is completely undocumented—it does not appear in the site's own API listings, there is no OpenAPI schema, no example request/response, and all documentation pages returned only a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —The endpoint path /api/v1/policies/88 is not listed among the site's advertised APIs; its actual functionality is unknown.
- —All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no usable content.
- —No OpenAPI schema, no example responses, and no description of what data this endpoint returns upon successful payment.
- —The 'Premium API Access' title is generic and does not describe the endpoint's purpose.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/policies/88
- —The site advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com