Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com serves "lab results" data at the path `/api/v1/lab/results/70`. It is 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 with no API keys, no rate limits, and no commitments required.
Payment is settled on the Base network using USDC (contract `0x8335…2913`) via the x402 exact-payment scheme. The probe confirmed the endpoint is live, returning a proper 402 challenge with `maxAmountRequired` of 20,000 base units (USDC has 6 decimals, so this equals $0.02). The endpoint accepts HTTP POST requests and returns `application/json` responses.
The specific resource at `/api/v1/lab/results/70` is labeled "Premium API Access" but no further documentation describes the shape of the response payload or what "lab results" refers to. The provider's landing page lists this endpoint's category peers but does not include this particular path in its public catalog. Without an OpenAPI spec, response schema, or worked examples, the exact data returned remains unclear. Agents should treat this as an opaque JSON endpoint until the provider publishes more documentation.
Capabilities
Use cases
- —Retrieving lab result data (ID 70) on demand with per-call USDC micropayments
- —Integrating pay-per-use data endpoints into autonomous agent workflows without pre-registration
- —Demonstrating x402 payment protocol integration on the Base L2 network
Fit
Best for
- —Agents or developers needing keyless, pay-per-call data access
- —x402 protocol experimentation and integration testing
- —Low-friction micropayment API consumption on Base
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume batch processing where per-call pricing is inefficient
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/70
# Returns 402 with x402 challenge. Attach X-PAYMENT header with valid USDC payment on Base to receive the JSON response.Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no response schema, no example payloads, and the meaning of 'lab results/70' is undocumented. The crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. This is effectively a stub listing.
Warnings
- —No OpenAPI or response schema available — the shape of the returned data is unknown.
- —The specific path /api/v1/lab/results/70 is not listed on the provider's public catalog page, making its purpose unclear.
- —'Lab results' could refer to medical/health data, which may be a regulated category — but there is no evidence either way.
- —Documentation pages (/api, /pricing, /README) returned no useful content beyond 'Connect wallet'.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/70
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/70
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com