Pay-per-call stock price data for CME via x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com provides stock/commodity price data for CME (Chicago Mercantile Exchange listed instruments) through the x402 payment protocol. Each API call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.
The provider, lowpaymentfee.com, hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request and settled via USDC on Base. The specific endpoint `/api/v1/stocks/CME/price` appears to serve price information for CME-listed instruments. However, documentation is extremely thin — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail on request/response schemas, supported tickers, or data freshness.
The endpoint is live and returns a valid x402 challenge (HTTP 402) with `maxAmountRequired` of 20000 base units of USDC (6 decimals), which equals $0.02. Payment is settled on the Base network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. Because there is no OpenAPI spec, no example responses, and no documentation beyond the landing page listing, the exact request body format and response structure are unknown.
Capabilities
Use cases
- —Retrieving real-time or recent price data for CME-listed instruments
- —Automated trading bots needing on-demand price checks without API key management
- —Agent workflows that need market data with micropayment settlement on Base
Fit
Best for
- —Agents or bots that can settle USDC payments on Base
- —Low-volume, on-demand CME price lookups without subscription commitments
- —x402-native workflows needing financial market data
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users who need comprehensive historical price datasets or OHLCV candles
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/CME/price \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming it accepts payments. However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty beyond a wallet-connect prompt. The actual data returned is unknown, making this effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'
- —Request body schema is unknown; no OpenAPI or example requests provided
- —Response schema is unknown; no example responses available
- —Data freshness, coverage of CME instruments, and update frequency are undocumented
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stocks/CME/price
- —All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/CME/price