Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com provides access to a "lab results" resource at the path `/api/v1/lab/results/90`. It is part of a broader platform offering dozens of pay-per-call APIs 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 endpoint `/api/v1/lab/results/90` accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals). The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base mainnet using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. No API keys, rate limits, or subscriptions are required — access is purely pay-per-use.
The platform advertises itself with the tagline "No API keys, No rate limits, Instant access" on the Base network. However, the exact nature of the data returned by the `/api/v1/lab/results/90` endpoint is unclear — the listing title is simply "Premium API Access" and no detailed documentation, request schema, or response schema is available. The "90" in the path may refer to a specific result ID or resource identifier, but this is not documented.
Capabilities
Use cases
- —Retrieving lab or analytical results on a per-call payment basis
- —Integrating pay-per-use data endpoints into agent workflows without managing API keys
- —Programmatic access to structured results settled via on-chain USDC micropayments
Fit
Best for
- —Developers wanting zero-signup, pay-per-call API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer on-chain micropayments over subscription billing
Not for
- —Users needing detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/90 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no documentation on what this specific endpoint returns, no request/response schema, no examples, and the crawled pages beyond the homepage are empty wallet-connect stubs. The purpose of '/api/v1/lab/results/90' is essentially unknown.
Warnings
- —No documentation available for the specific /api/v1/lab/results/90 endpoint — its purpose and response format are unknown
- —This endpoint path does not appear in the provider's own homepage API listing, raising questions about whether it is a standard offering
- —No OpenAPI spec, no request schema, and no response schema were found
- —Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/90
- —USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/90
- —Platform pricing is $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 & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com