Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/158` is listed as "Premium API Access" and returns a standard x402 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader lowpaymentfee.com platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.
However, the specific endpoint `/api/v1/wire/158` does not appear in the site's public API listing, and its actual functionality is unclear. The description simply says "Premium API Access" with no further documentation, input/output schema, or examples available. The docs, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. Without knowing what this endpoint actually does, callers should treat it as an opaque paid endpoint until more documentation surfaces.
Capabilities
Use cases
- —Programmatic access to a paid API endpoint without needing API keys or subscriptions
- —Agent-driven workflows that pay per call using USDC on Base
- —Testing x402 protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —AI agents that need keyless, pay-per-use API access
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone requiring free or high-volume bulk access at lower per-call cost
- —Use cases requiring a known, well-documented output schema
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/158 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/wire/158",
"body": {},
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-payment-proof>",
"Content-Type": "application/json"
}
}Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no output schema, no examples, and the endpoint path (/api/v1/wire/158) does not match any publicly listed API on the site. The actual functionality is unknown, making this effectively a stub listing.
Warnings
- —Endpoint /api/v1/wire/158 is not listed among the site's publicly documented APIs — its actual functionality is unknown.
- —All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no useful content.
- —No input or output schema is available; callers cannot know what data to send or expect back.
- —The 'Premium API Access' description is generic and does not describe what the endpoint does.
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network.https://lowpaymentfee.com/api/v1/wire/158
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access.https://lowpaymentfee.com
- —The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com
- —Docs, pricing, and README pages render only a 'Connect wallet' prompt.https://lowpaymentfee.com/docs