Pay-per-call stock price lookup for ticker C (Citigroup) via x402 on Base.
What it does
This x402 endpoint at lowpaymentfee.com returns stock price data for the ticker symbol "C" (Citigroup). 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 services. The endpoint accepts POST requests and returns JSON.
Pricing is $0.02 per request, paid in USDC on the Base network (the x402 challenge advertises a maxAmountRequired of 20000 base units against the USDC contract 0x8335…2913, which has 6 decimals, yielding $0.02). No API keys, subscriptions, or rate limits are advertised — callers simply attach an x402 payment header to each request. The payment timeout is 300 seconds.
Documentation is extremely sparse. The provider's docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but the exact request body format and response shape for stock price data must be inferred. The endpoint path suggests it returns the current price for ticker "C", but details like supported fields, historical data, or real-time vs. delayed quotes are unknown.
Capabilities
Use cases
- —Fetching the current stock price for Citigroup (ticker C) in an automated trading or monitoring pipeline
- —Agents that need on-demand equity price data without managing API keys or subscriptions
- —Integrating real-time stock quotes into dashboards or bots with per-request crypto payments
Fit
Best for
- —AI agents needing keyless, pay-per-call stock price data
- —Developers prototyping finance tools who want zero-commitment API access
- —x402-native workflows settling micropayments in USDC on Base
Not for
- —Bulk historical stock data retrieval (no evidence of batch or historical endpoints)
- —Users who need comprehensive market data (options, fundamentals, order books) — only a single-ticker price endpoint is documented
- —Callers who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/C/price \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The actual data returned is entirely unknown, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema available — request body format and response structure are unknown
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content
- —The specific data returned (real-time vs. delayed, fields included) for the stock price endpoint is unverified
- —Ticker 'C' is inferred to be Citigroup but this is not confirmed by provider documentation
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/stocks/C/price
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stocks/C/price
- —Provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages render only a 'Connect wallet' prompt with no additional contenthttps://lowpaymentfee.com/docs