Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.
The specific endpoint at `/api/v1/transfers/89` is listed as "Premium API Access." Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per call. Payment is made via the x402 exact scheme to the payTo address on Base. The endpoint accepts POST requests and returns application/json.
The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (pages like /docs, /pricing, and /README only show a "Connect wallet" prompt), so the actual functionality and response schemas of individual endpoints are not documented or verifiable from the crawl material.
Capabilities
Use cases
- —Programmatic access to utility/data endpoints without managing API keys or subscriptions
- —Agent-driven workflows that need low-cost per-call pricing settled on-chain
- —Testing x402 payment flows against a live endpoint on Base
Fit
Best for
- —Developers wanting zero-friction, keyless API access via crypto micropayments
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing simple pay-as-you-go pricing with no minimums
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Applications requiring high-throughput batch processing where per-call fees add up
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/89 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of this specific endpoint (/api/v1/transfers/89) is unclear beyond the generic label 'Premium API Access.' The docs, pricing, and README pages are all blank.
Warnings
- —No documentation available — /docs, /pricing, and /README pages are empty (only show 'Connect wallet')
- —The specific function of /api/v1/transfers/89 is unknown; 'Premium API Access' is a generic label
- —No request body schema or response schema is documented or inferrable
- —The platform lists many endpoint categories but none can be verified from crawl content
Citations
- —Endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units USDC on Basehttps://lowpaymentfee.com/api/v1/transfers/89
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/transfers/89
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, pricing, and README pages only display 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs