Pay-per-call stock quote for BKNG (Booking Holdings) via x402 on Base, settled in USDC.
What it does
This x402 endpoint at lowpaymentfee.com returns stock data for Booking Holdings (ticker: BKNG) in JSON format. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning finance, AI/ML, data analytics, and utility services. The endpoint accepts POST requests and charges $0.02 per call, paid in USDC on the Base network using the x402 payment protocol — no API keys, accounts, or rate limits required.
The x402 challenge confirms the endpoint is live and returns a 402 Payment Required response with a well-formed payment challenge. The asset address (0x8335…) corresponds to USDC on Base (6 decimals), and the maxAmountRequired of 20000 base units equals $0.02. Payment is sent to address 0x1A2B…85F3 with a 300-second timeout window.
Documentation is extremely sparse. The provider's landing page lists available endpoints and pricing, but the /docs, /pricing, 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 for the stocks endpoint. The exact fields returned (e.g., price, volume, market cap) are unknown and must be discovered by making a paid call.
Capabilities
Use cases
- —Fetching current stock data for Booking Holdings (BKNG) without needing an API key or subscription
- —Integrating pay-per-call stock quotes into an autonomous agent workflow via x402
- —Prototyping financial dashboards with low-commitment, no-signup data access
Fit
Best for
- —Agents or bots that need on-demand stock data with crypto micropayments
- —Developers who want zero-signup access to stock quotes
- —x402-compatible clients on the Base network
Not for
- —Bulk or high-frequency trading data needs (no documented batch endpoint)
- —Users who need comprehensive documentation or guaranteed SLA
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/BKNG \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page, no example request/response, and no description of what fields the stocks endpoint actually returns. This is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — response format for /api/v1/stocks/BKNG is completely unknown
- —All documentation pages (/docs, /pricing, /README) render only 'Connect wallet' with no usable content
- —No example responses available; actual data fields must be discovered by making a paid request
- —Provider offers a very broad set of endpoints (AI, analytics, finance, utils) all at $0.02 — unclear whether all are fully implemented
Citations
- —The endpoint returns HTTP 402 with x402 challenge, maxAmountRequired 20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/stocks/BKNG
- —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/BKNG