Crude oil (CL) market quote via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides a market quote for CL (crude oil futures) through the x402 payment protocol. It is part of a broader suite of finance, data, AI, and utility APIs offered by the same provider, all priced at $0.02 per request and settled in USDC on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals). There are no API keys, no rate limits, and no signup required — access is granted per-request upon valid payment. The payment is sent to the on-chain address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
Documentation is extremely sparse. The provider's landing page lists many endpoints across categories (finance, AI, data, infrastructure) but provides no request/response schemas, no example payloads, and no detailed docs — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. The specific fields returned in the CL quote response are unknown. The endpoint is confirmed live via a valid 402 challenge.
Capabilities
Use cases
- —Fetching a real-time or near-real-time crude oil (CL) market quote for trading bots
- —Integrating commodity price data into financial dashboards without API key management
- —Agent-driven portfolio analysis that needs on-demand oil price lookups
- —Micropayment-gated access to market data for pay-as-you-go applications
Fit
Best for
- —Developers or agents needing quick crude oil quotes without subscription commitments
- —x402-compatible autonomous agents on the Base network
- —Low-volume or sporadic commodity data consumers who prefer per-call pricing
Not for
- —High-frequency trading requiring sub-millisecond latency and guaranteed SLAs
- —Users who need comprehensive historical OHLCV data or full order book depth
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/CL \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and no OpenAPI spec. The actual data returned by the CL quote endpoint is entirely unknown, making this effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.
- —No request or response schema provided; the fields returned by the CL quote are unknown.
- —No OpenAPI specification or example payloads available.
- —The provider lists many endpoints across diverse categories (AI, finance, data, infrastructure) all at $0.02 — the breadth and uniformity may indicate a demo or placeholder service rather than production-grade APIs.
Citations
- —Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/market/quote/CL
- —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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/CL
- —Provider offers endpoints across finance, AI, data analytics, and infrastructure categorieshttps://lowpaymentfee.com