Stock market quote for NSC via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides a market quote for the ticker symbol NSC (Norfolk Southern Corporation) through the lowpaymentfee.com platform. It is part of a broader suite of finance, analytics, AI, and utility APIs all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals) and requires no API keys, accounts, or rate-limit management — payment is handled per-call via the x402 `X-PAYMENT` header.
The endpoint accepts HTTP POST requests and returns JSON. The x402 challenge was successfully captured, confirming the endpoint is live. Payment is settled in USDC (contract `0x8335…2913`) on Base to the payee address `0x1A2B…85F3`. The maximum timeout for payment settlement is 300 seconds.
Documentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact fields returned in the market quote response are unknown and must be discovered by making a paid request. The platform advertises no rate limits and instant access.
Capabilities
Use cases
- —Fetching a real-time or near-real-time market quote for NSC (Norfolk Southern) programmatically
- —Integrating stock quote data into an AI agent workflow without managing API keys
- —Pay-per-call market data access for low-volume or sporadic usage patterns
Fit
Best for
- —Agents or bots that need on-demand stock quotes without subscription overhead
- —Developers prototyping finance apps who want instant access with no signup
- —x402-native workflows on the Base network needing market data
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users who need quotes for arbitrary tickers (this endpoint is scoped to NSC only)
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/NSC \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters or response schema. The /docs, /pricing, and /README pages are all empty beyond a wallet-connect prompt. Without any OpenAPI spec, examples, or field descriptions, this is effectively a stub listing.
Warnings
- —No OpenAPI spec or request/response schema available
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content
- —Response format and fields for the market quote are completely unknown
- —It is unclear whether this returns real-time, delayed, or cached market data
- —Endpoint is scoped to a single ticker (NSC); generalizability unknown
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base unitshttps://lowpaymentfee.com/api/v1/market/quote/NSC
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/NSC
- —Documentation pages /docs, /pricing, /api, /README all show only 'Connect wallet'https://lowpaymentfee.com/docs