Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com is part of a broader suite of pay-per-request APIs accessible via the x402 payment protocol on the Base network. The specific resource `/api/v1/lab/results/95` is listed under "Premium API Access" and accepts POST requests, returning JSON. Payment is settled in USDC (contract 0x8335…2913 on Base) at a maximum cost of $0.02 per request (20,000 base units with 6 decimals).
The provider's landing page advertises multiple API categories — Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced uniformly at $0.02 per call. The platform emphasizes no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request. The specific functionality behind `/api/v1/lab/results/95` is not documented beyond the generic "Premium API Access" label, so the exact data or computation returned by this particular endpoint is unclear.
The x402 challenge was successfully captured (HTTP 402 with a well-formed accepts array), confirming the endpoint is live. However, there is no OpenAPI schema, no detailed documentation, and no example responses available from the crawl. The endpoint path suggests it may return lab or experimental results keyed by an ID (95), but this is speculative.
Capabilities
Use cases
- —Fetching premium data or lab results via a single paid POST request
- —Integrating pay-per-call APIs into agent workflows without API key management
- —Programmatic access to gated content settled on Base L2 in USDC
Fit
Best for
- —Agents or scripts that need keyless, pay-per-use API access
- —Developers experimenting with x402 payment protocol integrations
- —Use cases requiring low-friction micropayments ($0.02) on Base
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-request fees add up quickly
- —Anyone needing to understand the exact response schema before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/95 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no example responses, and the purpose of this specific endpoint (/api/v1/lab/results/95) is undocumented. Effectively a stub listing with verified liveness.
Warnings
- —The exact functionality of /api/v1/lab/results/95 is not documented anywhere in the crawled material.
- —No OpenAPI spec, example request/response, or detailed docs are available.
- —The endpoint path is not listed among the provider's advertised API categories, suggesting it may be experimental or unlisted.
- —No robots.txt or agents.txt found on the domain.
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC on Base at maxAmountRequired 20000 (=$0.02).https://lowpaymentfee.com/api/v1/lab/results/95
- —The provider advertises uniform $0.02/request pricing with no API keys, no rate limits, and instant access.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/lab/results/95