Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific endpoint `/api/v1/transfers/162` is one of many API endpoints offered by this provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.
The endpoint accepts POST requests and requires an X-PAYMENT header containing a valid x402 payment proof. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The provider advertises no API keys, no rate limits, and instant access — a pure pay-per-request model.
The specific functionality of the `/api/v1/transfers/162` endpoint is not documented beyond the generic label "Premium API Access." The provider's landing page lists numerous endpoints across analytics, AI/ML, finance, and utility categories, all priced at $0.02 per request. Documentation pages (docs, pricing, README) appear to require wallet connection and did not yield substantive content during crawl. Without further documentation, the exact input/output schema for this particular endpoint remains unknown.
Capabilities
Use cases
- —Accessing premium API services without traditional API key registration
- —Making one-off API calls with instant USDC micropayments on Base
- —Integrating pay-per-request services into autonomous agent workflows
Fit
Best for
- —Developers wanting keyless, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed API documentation before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Developers without Base network USDC wallets
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/162 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this specific endpoint does, no input/output schema, and no example responses. The generic label 'Premium API Access' provides no functional clarity.
Warnings
- —The exact functionality of /api/v1/transfers/162 is undocumented — 'Premium API Access' is a generic label
- —Documentation pages require wallet connection and yielded no content during crawl
- —No input or output schema available beyond the x402 challenge metadata
- —This endpoint's purpose is unclear relative to the provider's other categorized endpoints
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/transfers/162
- —Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/transfers/162
- —Provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com