Real-time stock price data for AXP (American Express) via x402 micropayment on Base.
What it does
This endpoint returns the current stock price for American Express (ticker: AXP) through the lowpaymentfee.com platform. It uses the x402 payment protocol, settling in USDC on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider, lowpaymentfee.com, offers a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced uniformly at $0.02 per request. This specific endpoint sits under the finance category and serves stock price data. The response MIME type is application/json. The endpoint accepts POST requests.
Documentation beyond the landing page 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 the response schema. The endpoint is confirmed live (returns a proper 402 challenge), but the exact shape of the returned stock price JSON is unknown.
Capabilities
Use cases
- —Fetching the current American Express (AXP) stock price in an automated trading or analytics pipeline
- —Agents that need on-demand equity price lookups without managing API keys or subscriptions
- —Building dashboards or alerts that pull live stock prices with micropayment settlement
Fit
Best for
- —AI agents needing keyless, pay-per-call stock price data
- —Developers prototyping finance apps who want instant access without signup
- —x402-native workflows on the Base network
Not for
- —Bulk historical stock data retrieval (single-ticker, single-price endpoint)
- —Users who need comprehensive market data (options, volume, fundamentals) — only price is indicated
- —Non-crypto users who cannot settle USDC payments on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/AXP/price \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The listing is largely inferred from the URL path and landing page.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
- —No example request or response payloads are available to verify output structure
- —The specific stock data source and update frequency are undisclosed
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base network at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/stocks/AXP/price
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stocks/AXP/price