Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides pay-per-request API access using the x402 protocol, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/65` is listed under "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader lowpaymentfee.com platform advertises a wide catalog of endpoints spanning 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 uniformly priced at $0.02 per request.
However, the specific endpoint `/api/v1/lab/results/65` does not clearly map to any of the documented categories on the landing page. Its path suggests it may return lab or experimental results for a resource with ID 65, but no further documentation, request schema, or response schema is available. The endpoint is confirmed live (returns a proper 402 x402 challenge), accepts POST requests, and returns application/json.
Capabilities
Use cases
- —Accessing premium data or lab results without subscription or API key management
- —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
- —Programmatic retrieval of results from a pay-per-request endpoint with no rate limits
Fit
Best for
- —Developers or agents who want zero-commitment, per-call API pricing
- —Use cases requiring crypto-native (USDC on Base) payment settlement
- —Quick integration without registration or API key provisioning
Not for
- —Users who need detailed documentation or well-defined request/response schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/65 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation on what `/api/v1/lab/results/65` actually returns, no request or response schema, and the path doesn't match any documented category on the site. Pricing is clear ($0.02/request in USDC on Base). The listing is essentially a stub with confirmed liveness.
Warnings
- —The specific path /api/v1/lab/results/65 is not documented on the provider's landing page and its purpose is unclear.
- —No request body schema or response schema is available — callers cannot know what to send or what to expect back.
- —The broader site lists many endpoint categories but provides no detailed API documentation for any of them.
- —Pages at /api, /pricing, and /README returned only a 'Connect wallet' prompt with no useful content.
Citations
- —Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/65
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/65
- —All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com