x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.
What it does
This endpoint at lowpaymentfee.com is part of a suite of x402-protocol pay-per-call APIs hosted on the Base network. The specific resource `/api/v1/wire/133` is labeled "Premium API Access" and accepts POST requests gated by an x402 payment challenge. Payment is settled in USDC (contract 0x8335…2913 on Base) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys or subscriptions are required — callers attach an X-PAYMENT header with the appropriate payment proof and receive a JSON response.
The broader lowpaymentfee.com platform advertises several endpoint 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 listed at the same $0.02/request price point. However, the specific functionality behind `/api/v1/wire/133` is not documented beyond the generic "Premium API Access" label, so it is unclear which of these capabilities — if any — this particular wire endpoint maps to.
The site's documentation, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content during the crawl. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. Callers should be aware that without further documentation, the exact input format and response structure for this endpoint remain unknown.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without managing API keys or subscriptions
- —Agent-driven workflows that need to pay for API calls on-chain via x402
- —Integrating low-cost per-request services settled in USDC on Base
Fit
Best for
- —Developers or agents already set up with x402 payment flows on Base
- —Use cases requiring keyless, pay-as-you-go API access
- —Low-volume or bursty workloads where per-request pricing is preferable to subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume production workloads where undocumented endpoints pose a risk
- —Anyone without a Base-compatible USDC wallet or x402 client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/133 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/wire/133",
"body": {},
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-payment-proof>",
"Content-Type": "application/json"
}
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and the actual functionality behind 'Premium API Access' at /api/v1/wire/133 is completely undocumented. Docs pages returned only 'Connect wallet' with no content.
Warnings
- —The specific functionality of /api/v1/wire/133 is not documented — 'Premium API Access' is the only label provided.
- —All documentation, pricing, and README pages on the site returned only a 'Connect wallet' prompt with no substantive content.
- —No OpenAPI spec, request schema, or response schema is available.
- —It is unclear how /api/v1/wire/133 relates to the advertised endpoint categories (AI, analytics, finance, etc.).
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/wire/133
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/133
- —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 categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com