Stock market quote for AXP (American Express) via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides a stock market quote for the ticker symbol AXP (American Express) through the x402 payment protocol. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind x402 micropayments settled in USDC on the Base network.
The specific endpoint `/api/v1/market/quote/AXP` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The provider advertises flat $0.02/request pricing across all endpoints with no API keys, no rate limits, and no minimum commitments.
Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data source, response schema, and data freshness/quality are unknown. Use with caution until more documentation becomes available.
Capabilities
Use cases
- —Fetching a real-time or recent stock quote for American Express (AXP)
- —Programmatic market data retrieval without API key registration
- —Agent-driven portfolio monitoring that pays per call via x402
Fit
Best for
- —Agents or bots needing quick stock quotes without signup
- —x402-native workflows that settle micropayments in USDC on Base
- —Low-volume, pay-as-you-go market data consumption
Not for
- —High-frequency trading requiring guaranteed low-latency feeds with SLAs
- —Users who need documented response schemas and reliability guarantees
- —Bulk historical market data downloads
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/AXP \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no example request/response, and all documentation pages are empty stubs ('Connect wallet'). The actual response format and data source are completely unknown, making this effectively a stub listing.
Warnings
- —No documentation available — all doc pages render only 'Connect wallet'
- —No OpenAPI or output schema provided; response format is unknown
- —Data source and freshness for stock quotes are not disclosed
- —The endpoint path suggests ticker-specific routing (/quote/AXP) but no details on supported tickers or parameters
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/market/quote/AXP
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/AXP