Get the current stock price for IBM via a pay-per-call x402 endpoint on Base.
What it does
This endpoint returns the current stock price for IBM in JSON format, paid per request using the x402 protocol on the Base network. 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 priced at $0.02 per request with no API keys, no rate limits, and no commitments.
The specific endpoint at `/api/v1/stocks/IBM/price` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call. Payment is handled via the x402 `exact` scheme: the caller includes an `X-PAYMENT` header with a signed payment proof, and the server returns the stock price data upon verification. The x402 challenge was confirmed live, returning a proper 402 response with version 1 of the protocol.
Note that documentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint URL suggests it returns IBM stock price data, but the exact response format is unconfirmed.
Capabilities
Use cases
- —Fetching the current IBM stock price for a trading bot or portfolio tracker
- —Integrating real-time equity data into an AI agent workflow without managing API keys
- —Making one-off stock price lookups paid directly via crypto on Base
Fit
Best for
- —Agents or bots that need on-demand stock price data without subscription overhead
- —Developers who prefer crypto-native pay-per-call pricing over traditional API key management
- —Low-volume or sporadic stock price queries where $0.02/call is cost-effective
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data feeds
- —Historical stock data or OHLCV candle retrieval (no evidence this endpoint supports it)
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/IBM/price \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint exists and charges $0.02 in USDC on Base. However, there is no OpenAPI spec, no example request/response, and all documentation pages beyond the landing page are empty. The response schema and exact behavior must be inferred from the URL path alone.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc/pricing/README pages render only 'Connect wallet' with no content
- —No example responses or field descriptions for the stock price data
- —The endpoint path is ticker-specific (/stocks/IBM/price); it is unclear whether other tickers are supported via path substitution
Citations
- —The endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base with maxAmountRequired of 20000 base units ($0.02)https://lowpaymentfee.com/api/v1/stocks/IBM/price
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/IBM/price
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com