Pay-per-call lab results endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com provides "Premium API Access" for lab results data at the path `/api/v1/lab/results/50`. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, 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" scheme. The 402 challenge advertises a `maxAmountRequired` of 20,000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint accepts HTTP POST requests and returns `application/json` responses. A 300-second payment timeout is configured.
The specific endpoint `/api/v1/lab/results/50` is labeled "Premium API Access" but no further documentation describes the shape of the request body or the response payload. The provider's landing page lists this endpoint's category neighbors (analytics, AI, finance, utilities) but does not include this particular path in its public catalog, so the exact data returned is unclear. There is no OpenAPI spec, no README content, and no example payloads available.
Capabilities
Use cases
- —Retrieving lab or analytical results on a per-request payment basis without needing an API key
- —Integrating pay-per-call data access into autonomous agent workflows via x402
- —Accessing premium data endpoints with USDC micropayments on Base L2
Fit
Best for
- —Agents or applications that need keyless, pay-as-you-go API access
- —Developers wanting to test x402 payment flows with low-cost endpoints
- —Use cases requiring on-chain USDC settlement on Base for API calls
Not for
- —Users who need detailed documentation or OpenAPI schemas before integrating
- —High-volume consumers who prefer subscription-based pricing over per-call payments
- —Anyone needing non-USDC or non-Base payment settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/50 \
-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), but there is no OpenAPI spec, no request/response schema, no documentation beyond a generic landing page, and the specific purpose of '/api/v1/lab/results/50' is undocumented. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The specific path /api/v1/lab/results/50 is not listed on the provider's public catalog page — its exact purpose and response format are unknown
- —No example request or response payloads are available
- —The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/50
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/50