Pay-per-call stock quote for DUK (Duke Energy) via x402 on Base, settled in USDC.
What it does
This endpoint at lowpaymentfee.com returns stock data for the ticker DUK (Duke Energy) in JSON format. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning finance, AI/ML, data analytics, and utility categories. The endpoint uses the x402 payment protocol on the Base network, accepting USDC (USD Coin) at $0.02 per request. No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific endpoint `/api/v1/stocks/DUK` sits under the Finance & Web3 category of the provider's catalog. The x402 challenge confirms the endpoint is live, discoverable, and accepts POST requests. The payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The max amount required is 20,000 base units, which at 6 decimals equals $0.02.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no response schema, and no example responses available. The exact fields returned by the stock endpoint are unknown and must be discovered by making a paid request.
Capabilities
Use cases
- —Fetching current or recent stock data for Duke Energy (DUK) in automated trading or analytics pipelines
- —Agent-driven portfolio monitoring that needs on-demand equity quotes without subscription commitments
- —Integrating stock data into AI workflows where per-call micropayments are preferred over monthly plans
Fit
Best for
- —AI agents or bots that need occasional stock lookups without managing API keys
- —Developers prototyping finance apps who want instant, keyless access to equity data
- —Crypto-native workflows that can settle USDC payments on Base
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data feeds
- —Users who need comprehensive historical stock data or full market coverage across thousands of tickers
- —Anyone unable to make on-chain USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/DUK \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no response schema, no example responses, and the documentation pages are empty stubs. The actual data returned is entirely unknown.
Warnings
- —No OpenAPI or response schema available — the exact fields returned by the stock endpoint are undocumented
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no technical content
- —The provider lists many endpoint categories but specifics about data sources, freshness, and coverage are absent
- —Cannot verify what stock data fields (price, volume, OHLC, etc.) are included without making a paid request
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base at 20,000 base units ($0.02)https://lowpaymentfee.com/api/v1/stocks/DUK
- —The provider advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/stocks/DUK