Pay-per-call stock market quote for APD (Air Products) via x402 on Base, settled in USDC.
What it does
This endpoint provides a market quote for the ticker symbol APD (Air Products & Chemicals, Inc.) through the lowpaymentfee.com platform. It is part of a broader suite of finance, AI, data analytics, and utility APIs, all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC (USD Coin), with no API keys, rate limits, or subscriptions required.
The endpoint is live and responds with a standard x402 402 challenge when called without payment. It accepts POST requests and returns JSON. Payment is settled on-chain on Base to the specified payTo address using USDC (contract 0x8335…2913). The x402 challenge advertises a maxAmountRequired of 20000 base units, which at 6 decimals equals $0.02 per request.
The provider's landing page lists a wide catalog of endpoints across categories including finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), AI/ML (sentiment analysis, summarization, classification, embeddings), data analytics (metrics, reports, export, insights), and infrastructure utilities (geocoding, validation, conversion, generation). Documentation pages were largely empty at crawl time, showing only a "Connect wallet" prompt, so detailed request/response schemas for this specific endpoint are not available.
Capabilities
Use cases
- —Fetching a real-time or near-real-time market quote for APD (Air Products & Chemicals)
- —Integrating stock quote data into an AI agent workflow without managing API keys
- —On-demand market data retrieval with per-call USDC micropayments on Base
Fit
Best for
- —Agents or bots that need occasional stock quotes without subscription overhead
- —Developers wanting keyless, pay-as-you-go access to market data
- —Web3-native applications that can settle payments on the Base network
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users who need comprehensive historical market data or full order-book depth
- —Anyone without a Base-compatible wallet or USDC balance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/APD \
-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 documented request/response format, and all documentation pages returned only a 'Connect wallet' stub. The actual response payload for a successful paid request is unknown.
Warnings
- —No request or response schema documented — the exact fields returned by a successful call are unknown.
- —Documentation pages (/docs, /api, /pricing, /README) are all empty stubs showing only 'Connect wallet'.
- —The ticker 'APD' is inferred to be Air Products & Chemicals based on standard US equity ticker conventions; this is not confirmed by the provider.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/market/quote/APD
- —All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/market/quote/APD