Historical stock data for USB via x402 micropayment on Base network, $0.02 per request.
What it does
This endpoint provides historical stock data for USB (U.S. Bancorp) through the x402 payment protocol. It is hosted on lowpaymentfee.com, a platform offering a variety of pay-per-request APIs spanning data analytics, AI/ML, finance, crypto, and utility services. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an X-PAYMENT header containing a signed USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals) to the payTo address on Base. The payment challenge was confirmed live, returning a standard 402 response with x402Version 1.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the historical stock data includes or what query parameters are accepted. The endpoint path suggests it returns historical price data for the ticker "USB," but the exact shape of the request body and response payload is unknown.
Capabilities
Use cases
- —Retrieving historical price data for U.S. Bancorp (USB) stock
- —Building financial dashboards that pull stock history on demand
- —Agent-driven portfolio analysis requiring per-call stock data without subscriptions
- —Backtesting trading strategies with historical equity prices
Fit
Best for
- —Agents or apps needing on-demand stock history without API key management
- —Developers who want to pay per request with crypto (USDC on Base)
- —Low-volume or sporadic stock data lookups where subscriptions are wasteful
Not for
- —High-frequency trading requiring sub-second latency and guaranteed SLAs
- —Users who need comprehensive multi-ticker bulk historical data downloads
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/USB/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what data fields are returned. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or JSON schema describing request parameters or response format.
- —No example responses; the actual data returned by this endpoint is unknown.
- —The ticker 'USB' is inferred from the URL path but not confirmed by any documentation.
- —The provider site lists many diverse API categories (AI, analytics, finance, utils) all at $0.02 — the breadth and quality of each is unverified.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.https://lowpaymentfee.com/api/v1/stocks/USB/history
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/stocks/USB/history