Pay-per-call premium API access on Base via x402 — $0.02/request 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 provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific endpoint `/api/v1/payments/365` is labeled "Premium API Access" but the provider does not document what this particular route returns or what input it expects beyond an HTTP POST. The x402 challenge confirms the endpoint is live, accepting USDC (contract 0x8335…2913) on Base with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is settled on-chain to address 0x1A2B…85F3 with a 300-second timeout.
The provider's landing page lists 16 other endpoints across analytics, AI/ML, finance, and utility categories, all at the same $0.02 price point. However, documentation pages (/docs, /api, /pricing, /README) all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no examples available. Because of this, the actual functionality behind `/api/v1/payments/365` is unclear — the name "Premium API Access" is generic and could be a meta-endpoint or a placeholder.
Capabilities
Use cases
- —Accessing paid API services without needing API keys or subscriptions
- —Making one-off API calls settled instantly in USDC on Base
- —Agent-driven workflows that need permissionless, pay-as-you-go API access
Fit
Best for
- —Developers wanting zero-signup, pay-per-use API access
- —AI agents that can settle x402 payments autonomously
- —Users already holding USDC on Base who want frictionless API calls
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone looking for free or ad-supported API access
- —Use cases requiring high-throughput batch processing (no documented rate limits but no guarantees either)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/365 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what this specific endpoint actually does. The docs, API, pricing, and README pages all render only a wallet-connect prompt with no content. The endpoint name 'Premium API Access' is generic and uninformative.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README all return only a 'Connect wallet' prompt with no content.
- —The purpose and functionality of /api/v1/payments/365 ('Premium API Access') is undocumented and unclear.
- —No OpenAPI spec or request/response schema is provided.
- —No examples of successful responses are available anywhere in the crawl.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/payments/365
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The provider offers 16+ endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs