Pay-per-call stock quote API for KO (Coca-Cola) via x402 on Base, settled in USDC.
What it does
This endpoint at lowpaymentfee.com provides stock data for the ticker KO (Coca-Cola) through an x402-gated API. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required — you simply attach an x402 payment header to a POST request and receive a JSON response.
The endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all uniformly priced at $0.02 per request. The x402 challenge confirms the endpoint is live, accepting payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README 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 path suggests it returns data for the KO ticker, but the exact schema and data source are unknown.
Capabilities
Use cases
- —Retrieving current or recent stock data for Coca-Cola (KO) without needing an API key or subscription
- —Integrating stock lookups into autonomous AI agents that can settle payments on Base
- —Building trading dashboards or alerts that pay per query rather than maintaining a subscription
Fit
Best for
- —Agents or apps needing occasional stock lookups without subscription overhead
- —x402-native workflows on the Base network
- —Developers who want zero-signup, pay-as-you-go stock data access
Not for
- —High-frequency trading requiring sub-millisecond latency and guaranteed SLAs
- —Users who need comprehensive historical stock data or bulk downloads
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/KO \
-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 no documentation, no OpenAPI schema, no example request/response, and no description of what data the endpoint actually returns. Effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no technical content
- —No OpenAPI or schema describing request parameters or response fields
- —Unknown data source and freshness for stock quotes — unclear if this is real-time, delayed, or historical data
- —Response schema is entirely unknown; the output format must be discovered empirically
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base at $0.02 per requesthttps://lowpaymentfee.com/api/v1/stocks/KO
- —All APIs on lowpaymentfee.com are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/stocks/KO
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/stocks/KO