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 site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Each call costs $0.02 in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific resource at `/api/v1/generate/resource/162` is listed under the generic title "Premium API Access." The x402 challenge confirms it is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913) on Base. The max amount required is 20,000 base units, which at 6 decimals equals $0.02 per request. Payment is made via the `exact` scheme with a 300-second timeout.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what resource 162 specifically returns. The endpoint appears functional based on the 402 challenge, but without documentation it is unclear what payload to send or what response to expect.
Capabilities
Use cases
- —Accessing pay-per-request API services without API key registration
- —Making micropayment-gated API calls settled in USDC on Base
- —Agent-driven programmatic access to utility/generation endpoints
Fit
Best for
- —Developers wanting keyless, pay-as-you-go API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed API documentation and request/response schemas before integrating
- —High-volume use cases where per-request pricing may add up compared to flat-rate plans
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/162 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation: no OpenAPI spec, no request/response examples, no description of what resource/162 actually does. The docs, pricing, and README pages are all empty. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all return only 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response format
- —The specific function of resource/162 is unknown; 'Premium API Access' is a generic label
- —Cannot verify what data or service this endpoint actually provides
Citations
- —The site lists APIs at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/generate/resource/162
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/generate/resource/162