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. The specific path `/api/v1/accounts/170` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint is live and returns a valid x402 challenge on POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme payment of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). There are no API keys required, no rate limits advertised, and access is described as instant once payment is made. The payment timeout is 300 seconds.
However, the specific functionality behind `/api/v1/accounts/170` is unclear. The provider's landing page lists many endpoints across different categories but does not explicitly list this particular path. There is no OpenAPI schema, no request/response documentation, and the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. The endpoint's description is simply "Premium API Access" with a JSON MIME type, but what data it returns or what input it expects is not documented.
Capabilities
Use cases
- —Accessing premium API data with per-request USDC micropayments on Base
- —Agent-driven API consumption without API key management
- —Testing x402 payment protocol integrations
Fit
Best for
- —Developers experimenting with x402 pay-per-call patterns
- —Agents that need keyless, on-demand API access settled in USDC on Base
- —Low-volume consumers who prefer pay-as-you-go over subscriptions
Not for
- —Users who need detailed API documentation before integrating
- —High-volume consumers who need bulk pricing or rate guarantees
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/170 \
-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 OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/accounts/170 is undocumented. The docs pages are empty beyond a wallet connect prompt. This is effectively a stub listing.
Warnings
- —The specific functionality of /api/v1/accounts/170 is not documented anywhere on the provider's site
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content
- —No OpenAPI schema or request/response examples are available
- —The endpoint path does not appear in the provider's listed API catalog, making its purpose unclear
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/170
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/170