Pay-per-call stock price lookup for ADP via x402 on Base (USDC).
What it does
This endpoint returns stock price data for ADP (Automatic Data Processing) via the x402 payment protocol. It is hosted on lowpaymentfee.com, a platform offering a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 protocol on the Base network, settling payments in USDC.
The specific endpoint at `/api/v1/stocks/ADP/price` accepts POST requests and returns JSON. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each call. The payment is sent to a specified address on Base and settles in USDC (contract 0x8335…2913).
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no response schema, and no example responses available. The endpoint URL pattern (`/stocks/{ticker}/price`) suggests it may support other stock tickers beyond ADP, but this is unconfirmed. The endpoint is live and returning a valid 402 challenge.
Capabilities
Use cases
- —Retrieving the current stock price of ADP in an automated trading or analytics pipeline
- —Agent-driven portfolio monitoring that pays per data request without subscription
- —Integrating real-time equity pricing into a Web3 application using on-chain micropayments
Fit
Best for
- —AI agents needing on-demand stock price data without API key management
- —Low-volume or sporadic stock price lookups where per-call pricing is economical
- —Web3-native applications that prefer on-chain USDC settlement over traditional billing
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data feeds
- —Users who need historical OHLCV data, charts, or comprehensive market analytics
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/ADP/price \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no response schema, no example responses, and all documentation pages are empty beyond a wallet-connect prompt. The actual data returned is entirely unknown.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No response schema or example response provided; output format is unknown
- —No OpenAPI or machine-readable spec found
- —It is unclear whether this endpoint supports tickers other than ADP
- —Stock/financial data endpoints may be subject to data licensing and redistribution restrictions
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stocks/ADP/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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/ADP/price