Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This x402-enabled endpoint at lowpaymentfee.com serves "lab results" data at the path `/api/v1/lab/results/94`. 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 and settled in USDC on the Base network.
The specific resource at `/api/v1/lab/results/94` is labeled "Premium API Access" in the x402 challenge. The endpoint accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The max amount required is 20,000 base units of USDC (0x8335…on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is gated purely by micropayment.
The platform's landing page lists categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, each with multiple endpoints at the same $0.02 price point. However, no OpenAPI schema, detailed documentation, or example request/response payloads are available for this specific endpoint. The exact data returned by `/api/v1/lab/results/94` is not documented — the name "lab results" and the numeric ID suggest it may return a specific dataset or test result, but this is unconfirmed.
Capabilities
Use cases
- —Retrieving lab results or dataset #94 via a single micropayment
- —Demonstrating x402 protocol integration for pay-per-call APIs
- —Programmatic access to premium data without subscription or API key management
Fit
Best for
- —Agents or developers experimenting with x402 micropayment protocols
- —Use cases requiring keyless, pay-as-you-go API access on Base
- —Low-volume consumers who want to avoid subscriptions
Not for
- —Users needing well-documented, schema-defined API contracts
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone requiring non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/94 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request/response, and the purpose of 'lab results/94' is entirely opaque. The crawl pages beyond the landing page returned only 'Connect wallet' with no useful content.
Warnings
- —No documentation or schema available for /api/v1/lab/results/94 — the actual data returned is unknown.
- —The term 'lab results' is unexplained; it could refer to test data, scientific results, or placeholder content.
- —No OpenAPI spec, no example payloads, and no README content was accessible.
- —The broader platform lists many endpoints but none have detailed docs in the crawl.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/lab/results/94
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/94