Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/lab/results/57` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request with no API keys, no rate limits, and no minimum commitments.
The specific resource `/api/v1/lab/results/57` is listed under the title "Premium API Access" and returns `application/json` responses via HTTP POST. The x402 challenge confirms the endpoint is live, accepting exact-scheme payments of up to 20,000 base units of USDC (0.02 USD) to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. However, the exact nature of the "lab results" data returned by this particular endpoint is not documented in the crawled material — the path suggests it retrieves a specific result set identified by ID 57, but no schema or sample response is available.
The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export, all at the same $0.02 price point. Without further documentation or an OpenAPI spec, the precise request body format and response schema for this endpoint remain unknown.
Capabilities
Use cases
- —Retrieving lab result data on-demand with per-call USDC micropayments
- —Integrating pay-as-you-go data access into agent workflows without API key management
- —Programmatic access to result sets via x402-compatible clients
Fit
Best for
- —Agents or developers wanting zero-signup, pay-per-call data access
- —x402-compatible wallets and clients on Base
- —Low-volume or sporadic access patterns where subscriptions are overkill
Not for
- —Users needing detailed documentation or guaranteed response schemas before integration
- —High-volume bulk data retrieval where per-call pricing becomes expensive
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/57 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documentation of request/response schemas, and the purpose of 'lab results/57' is entirely undocumented. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The meaning of 'lab results' and the data returned are completely undocumented
- —No example request body or response body available
- —The /api, /pricing, and /README pages returned no useful content (just 'Connect wallet')
- —The specific resource ID '57' is hardcoded in the path with no explanation of what it represents
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/57
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/57