Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to lab results data (resource ID 51) via the x402 payment protocol. It accepts HTTP POST requests and returns JSON responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units per call, which equals $0.02 USD (USDC uses 6 decimals).
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
This specific endpoint (/api/v1/lab/results/51) is not explicitly listed on the provider's landing page among the advertised API categories, so its exact data content is unclear. The x402 challenge was successfully captured (HTTP 402), confirming the endpoint is live and accepting payment-gated requests. No OpenAPI schema, detailed documentation, or example responses were found in the crawl.
Capabilities
Use cases
- —Retrieving lab results data on-demand with per-call USDC micropayments
- —Integrating pay-per-use data endpoints into agent workflows without API key management
- —Accessing gated data resources via x402 protocol on Base L2
Fit
Best for
- —Agents or applications that need on-demand data access without subscription commitments
- —Developers experimenting with x402 payment-gated APIs on Base
- —Low-volume or bursty workloads where per-call pricing is cost-effective
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone needing lab results with a well-defined, publicly documented schema
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/51 \
-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 schema, no documentation for this specific resource, no example request/response, and the endpoint path (/api/v1/lab/results/51) does not appear in the provider's own advertised API catalog. The actual data returned is unknown.
Warnings
- —This specific endpoint (/api/v1/lab/results/51) is not listed among the provider's advertised APIs on the landing page; its data content is unclear.
- —No OpenAPI spec, request schema, or response schema is available.
- —No documentation pages returned meaningful content (pricing, README, and /api pages only showed 'Connect wallet').
- —The term 'lab results' is ambiguous — it could refer to medical, scientific, or test data; actual payload is unknown.
Citations
- —The x402 challenge returns HTTP 402 with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/51
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/51