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 specific resource `/api/v1/lab/results/11` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The x402 challenge for this endpoint advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per call. Payment is made via the `exact` scheme, with a 300-second timeout. The endpoint accepts HTTP POST requests and returns `application/json`. No API keys or rate limits are advertised; access is gated purely by the x402 payment header.
The specific purpose of `/api/v1/lab/results/11` is not documented on the site — the landing page lists other endpoint categories (analytics, AI, finance, utilities) but does not mention a `/lab/results` path. This may be a test or experimental endpoint. The broader platform markets itself as offering simple, keyless, per-request pricing with no minimums or commitments.
Capabilities
Use cases
- —Accessing premium data or results via a single paid HTTP POST call
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to various data and utility endpoints
Fit
Best for
- —Developers or agents wanting keyless, per-call API access settled in USDC on Base
- —Exploring x402 payment protocol integrations
- —Low-commitment, no-subscription API consumption
Not for
- —Users needing detailed documentation or guaranteed SLAs for production workloads
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, the specific `/lab/results/11` path is undocumented, there is no OpenAPI schema, no request/response examples, and the crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. The purpose of this particular endpoint is unclear.
Warnings
- —The /api/v1/lab/results/11 path is not listed or documented on the provider's landing page — it may be experimental or a test endpoint.
- —No OpenAPI spec, request schema, or response examples are available.
- —Crawled /api, /pricing, and /README pages returned no useful content (only 'Connect wallet').
- —The exact data returned by this endpoint is unknown; use with caution.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout.https://lowpaymentfee.com/api/v1/lab/results/11
- —The platform lists endpoints priced at $0.02/request across data, AI, finance, and utility categories with no API keys or rate limits.https://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base (6 decimals), so 20000 base units = $0.02.https://lowpaymentfee.com