Pay-per-call stock quote API for NKE (Nike) via x402 on Base, settled in USDC.
What it does
This endpoint at lowpaymentfee.com provides stock data for Nike (ticker: NKE) behind an x402 paywall. It is part of a broader platform offering data & analytics, AI/ML, finance, crypto, and utility APIs, all priced at $0.02 per request with no API keys, no rate limits, and no commitments. Payment is settled on the Base network using USDC.
The specific endpoint `/api/v1/stocks/NKE` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, requiring a maximum of $0.02 (20,000 base units of USDC with 6 decimals) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The payment scheme is "exact," meaning the full amount is charged per request.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what fields the stock data response contains. The endpoint likely returns price or quote information for NKE, but the exact schema is unknown.
Capabilities
Use cases
- —Fetching current Nike (NKE) stock data on demand without subscription
- —Agent-driven portfolio monitoring that pays per query
- —Integrating real-time equity quotes into trading bots via micropayments
Fit
Best for
- —Agents or apps needing occasional stock lookups without API key management
- —Developers experimenting with x402 pay-per-call patterns
- —Low-volume stock data consumers who prefer usage-based pricing
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users who need comprehensive historical stock data or full market coverage
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/NKE \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no example request/response, and no description of the response schema. The platform pages beyond the landing page are empty ("Connect wallet" only). This is effectively a stub listing.
Warnings
- —No OpenAPI spec or schema available for request or response payloads
- —Documentation pages (/docs, /pricing, /api, /README) are empty — only show 'Connect wallet'
- —Exact response fields for stock data are unknown; endpoint behavior is inferred from the URL path
- —The broader platform lists many API categories but it is unclear which endpoints are fully functional
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stocks/NKE
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/NKE
- —Docs, pricing, API, and README pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs