x402-gated lab results endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" to lab results data via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments on the Base network using USDC.
The specific resource `/api/v1/lab/results/20` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). No API keys are required; payment is handled inline via the X-PAYMENT header. The platform advertises no rate limits and instant access.
Documentation is minimal — there is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and the crawled /api, /pricing, and /README pages all resolve to a "Connect wallet" prompt with no further detail. The exact nature of the "lab results" data returned by this endpoint is not documented anywhere in the crawled material, so its purpose must be treated as uncertain.
Capabilities
Use cases
- —Fetching lab results data on-demand with per-request USDC micropayments
- —Integrating x402-compatible agents that pay for data without API key management
- —Programmatic access to structured lab data via POST requests
Fit
Best for
- —Agents or services that already support x402 payment flows
- —Use cases requiring keyless, pay-as-you-go API access on Base
- —Low-volume or sporadic data retrieval where subscriptions are overkill
Not for
- —Users who need detailed documentation or schema guarantees before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone who needs to understand the exact data schema before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/20 \
-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 documentation on what 'lab results' data is returned, no request/response schema, no OpenAPI spec, and the crawled pages beyond the homepage are empty wallet-connect stubs. The purpose of this specific endpoint is essentially undocumented.
Warnings
- —No documentation exists for the /api/v1/lab/results/20 endpoint — the meaning of 'lab results' and the response schema are unknown.
- —No OpenAPI or machine-readable schema is available.
- —The /api, /pricing, and /README pages all resolve to a bare 'Connect wallet' prompt with no useful content.
- —The broader platform lists many endpoints but none appear individually documented.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/lab/results/20
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/lab/results/20