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 lowpaymentfee.com platform, which hosts a catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific endpoint `/api/v1/payments/265` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme to the payTo address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality this particular endpoint returns. The platform's landing page lists many other endpoints (analytics, AI, finance, utilities) but does not clarify what `/api/v1/payments/265` specifically does. Prospective users should be aware of this ambiguity.
Capabilities
Use cases
- —Accessing a premium API endpoint with per-request USDC micropayments on Base
- —Integrating x402-compatible payment flows into agent or application workflows
- —Testing x402 protocol payment challenges against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —Agents that need keyless, pay-per-call API access on Base
- —Low-volume consumers who want no-commitment API usage
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —High-volume production workloads requiring well-documented schemas and error handling
- —Anyone needing clarity on exactly what data this specific endpoint returns
Quick start
# 1. Send a POST to get the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/payments/265
# Returns 402 with x402 payment challenge.
# 2. Construct an X-PAYMENT header per x402 spec,
# paying up to 0.02 USDC on Base to the payTo address,
# then resend the POST with the header attached.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 functionality of /api/v1/payments/265 is entirely unclear. Docs pages render only 'Connect wallet' with no content. This is effectively a stub listing.
Warnings
- —The exact functionality of /api/v1/payments/265 ('Premium API Access') is undocumented and unclear.
- —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no usable content.
- —No OpenAPI schema, request format, or response format is available.
- —The platform lists many endpoints but none have detailed documentation visible in the crawl.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/payments/265
- —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 platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/payments/265