x402basequality 0.35

Pay-per-call stock price lookup for USB via x402 on Base, settled in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stocks/USB/price

What it does

This endpoint at lowpaymentfee.com returns stock price data for the ticker "USB" (U.S. Bancorp). It is part of a broader suite of pay-per-request APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, requiring a one-time USDC micropayment on the Base network per request — no API keys, no subscriptions, no rate limits.

The specific endpoint `/api/v1/stocks/USB/price` 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 call (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout window.

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 is confirmed live (returns a valid 402 challenge), but the actual data source, update frequency, and response format for stock prices are unknown.

Capabilities

stock-price-lookupx402-paymentusdc-micropaymentbase-networkpay-per-requestno-api-key

Use cases

  • —Fetching the current price of U.S. Bancorp (USB) stock programmatically
  • —Agent-driven portfolio monitoring that pays per data request
  • —Integrating real-time equity pricing into trading bots without API key management

Fit

Best for

  • —AI agents needing on-demand stock price data with no signup
  • —Developers who want keyless, pay-as-you-go financial data
  • —Crypto-native workflows that can settle USDC on Base

Not for

  • —Bulk historical stock data retrieval (single-ticker, single-call design)
  • —Users who cannot transact in USDC on the Base network
  • —Applications requiring documented response schemas or SLA guarantees

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stocks/USB/price \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stocks/USB/price
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The actual data source and response format are entirely unknown.

Warnings

  • —No OpenAPI or schema documentation available — response format is unknown
  • —All doc pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
  • —The stock ticker 'USB' in the URL path is hardcoded; it is unclear whether other tickers are supported at similar paths
  • —Data source, freshness, and accuracy of stock prices are undocumented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:21:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/UuZts9
Pay-per-call stock price lookup for USB via x402 on Base, settled in USDC. — Clawmart · Clawmart