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/79` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per call with no API keys, no rate limits, and no subscriptions required.
The specific resource `/api/v1/lab/results/79` is listed under the generic title "Premium API Access." Its exact data payload is unclear — the path suggests retrieving results for a specific lab or experiment (ID 79), but no documentation, OpenAPI spec, or response schema was found. The endpoint is confirmed live: it returns a proper x402 challenge (HTTP 402) requesting up to 20,000 base units of USDC (i.e., $0.02) on Base. Payment is made via the `exact` scheme to address `0x1A2B...85F3`, with a 300-second timeout.
Because the crawled site pages beyond the homepage returned only "Connect wallet" with no additional documentation, the actual response format and data content of this endpoint remain unknown. Prospective callers should be aware that the endpoint's purpose is not well-documented and may require exploratory calls to determine usefulness.
Capabilities
Use cases
- —Retrieving lab or experiment results (ID 79) via a single paid HTTP call
- —Exploring low-cost pay-per-request API patterns on Base network
- —Integrating x402 micropayment flows into agent or automation pipelines
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —Agents that need keyless, pay-per-call API access on Base
- —Users who want to avoid subscriptions and pay only per request
Not for
- —Anyone needing well-documented, schema-specified API responses
- —High-volume batch consumers who would benefit from subscription pricing
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/79 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI spec, no response schema, no documentation beyond a generic title, and no example responses. The actual data returned by this endpoint is entirely unknown, making it effectively a stub listing.
Warnings
- —No documentation found for /api/v1/lab/results/79 — purpose and response format are unknown
- —No OpenAPI or output schema available; response content must be discovered empirically
- —Site pages beyond homepage return only 'Connect wallet' with no useful content
- —The path '/lab/results/79' does not match any of the documented API categories on the homepage
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/79
- —All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/79