Pay-per-call stock market quote for UNP via x402 on Base, settled in USDC.
What it does
This endpoint at lowpaymentfee.com provides a market quote for the ticker symbol UNP (Union Pacific Corporation) via a simple POST request. It is part of a broader suite of finance, analytics, AI, and utility APIs offered by the same provider, all using the x402 payment protocol on the Base network.
The endpoint is live and returns a standard x402 402 challenge. Each request costs $0.02 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, maxAmountRequired=20000 base units = 0.02 USDC at 6 decimals). Payment is made via the x402 exact scheme with no API keys, no rate limits, and no subscriptions required — you pay per call. The response MIME type is application/json.
Documentation beyond the landing page is essentially absent; the /docs, /pricing, /api, and /README pages all resolve to a wallet-connect stub with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint path suggests it returns a financial quote for the UNP stock ticker, but the exact fields in the response body are unknown. The provider advertises a uniform $0.02/request pricing across all endpoints.
Capabilities
Use cases
- —Fetching a real-time or recent market quote for Union Pacific (UNP) stock
- —Integrating pay-per-call stock data into an AI agent workflow without API key management
- —Building trading bots or dashboards that settle data costs in USDC on Base
Fit
Best for
- —Agents or apps that need on-demand stock quotes without subscription overhead
- —Developers who prefer crypto-native micropayment APIs over traditional API key billing
- —Quick, low-cost single-ticker lookups for UNP
Not for
- —Bulk or high-frequency market data ingestion across many tickers (only UNP path documented)
- —Users who need detailed documentation, schemas, or guaranteed SLAs
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/UNP \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation, and no example payloads. The actual data returned is entirely unknown, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema available — request and response formats are unknown
- —All documentation pages (/docs, /pricing, /api, /README) return only a wallet-connect stub with no content
- —The exact data fields returned in the market quote response cannot be verified
- —Provider offers many endpoints but none have published schemas or examples
Citations
- —Endpoint returns a 402 x402 challenge with maxAmountRequired=20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/market/quote/UNP
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/market/quote/UNP
- —Uniform $0.02/request pricing, no API keys, no rate limitshttps://lowpaymentfee.com