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 access to a specific lab result resource (ID 68) behind an x402 paywall. The provider operates a broad suite of pay-per-request 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. No API keys, rate limits, or subscriptions are required; callers simply attach an x402 payment header to each POST request.
The specific resource `/api/v1/lab/results/68` is listed under the title "Premium API Access" but its exact data payload is not documented in the crawled material. The x402 challenge confirms the endpoint is live, accepts USDC (contract 0x8335…2913) on Base, and requires a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Because the provider's site does not include OpenAPI schemas, response examples, or detailed documentation for this particular endpoint, the exact structure of the returned JSON is unknown. The broader site advertises categories like analytics, AI, finance, and utilities, but this specific path (`/lab/results/68`) does not appear in the public listing, making its purpose unclear. Agents should be prepared for an opaque JSON response and may need to inspect the output at runtime.
Capabilities
Use cases
- —Retrieving a specific lab result record via a single micropayment
- —Programmatic access to gated data without managing API keys or subscriptions
- —Agent-driven data retrieval where per-call USDC payment is preferred over monthly billing
Fit
Best for
- —Agents that can settle x402 payments in USDC on Base
- —Use cases requiring one-off data retrieval without account setup
- —Developers exploring x402 protocol integrations
Not for
- —Users who need detailed documentation or response schemas before calling
- —High-volume batch retrieval where per-call pricing is inefficient
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/68 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no response examples, and the specific purpose of /api/v1/lab/results/68 is undocumented — it doesn't even appear in the provider's own public API listing. This is effectively a stub listing.
Warnings
- —The path /api/v1/lab/results/68 does not appear in the provider's public API catalog; its purpose and response schema are unknown.
- —No OpenAPI spec, response examples, or detailed documentation available.
- —The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content.
- —Endpoint purpose labeled generically as 'Premium API Access' with no further specifics.
Citations
- —The provider lists APIs at $0.02/request with no API keys, no rate limits, settled on Base network in USDC.https://lowpaymentfee.com
- —The x402 challenge confirms the endpoint is live, accepts USDC on Base with maxAmountRequired of 20000 base units (=$0.02).https://lowpaymentfee.com/api/v1/lab/results/68
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/lab/results/68