OHLCV candlestick data for ZRX (0x Protocol) via pay-per-call x402 on Base.
What it does
This endpoint provides OHLCV (Open, High, Low, Close, Volume) market data for the ZRX (0x Protocol) token. It is part of a broader suite of crypto and finance APIs hosted at lowpaymentfee.com, all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC, with no API keys, rate limits, or subscriptions required — callers simply attach an x402 payment header to each POST request.
The endpoint is live and returns a standard x402 challenge (HTTP 402) when called without payment. Settlement occurs on Base using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The provider advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 per request. The x402 version is 1, with a payment timeout of 300 seconds.
Documentation is extremely sparse. The provider's landing page lists many endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all at the same $0.02 price point. However, no detailed API documentation, request/response schemas, or usage examples are available from the crawled pages — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. The exact request body format and response schema for the OHLCV endpoint must be inferred or discovered experimentally.
Capabilities
Use cases
- —Fetching historical OHLCV candlestick data for ZRX to build trading charts
- —Backtesting trading strategies using ZRX price and volume history
- —Integrating ZRX market data into portfolio dashboards or bots
- —Agent-driven crypto analytics pipelines that pay per request
Fit
Best for
- —Developers needing quick, keyless access to ZRX OHLCV data
- —AI agents that can settle micropayments on Base via x402
- —Projects that want pay-per-use crypto data without subscriptions
Not for
- —Users needing free or bulk historical data downloads
- —Applications requiring real-time streaming/websocket price feeds
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no API documentation, no request/response schema, and no examples. The docs pages are empty. The request body format and response structure are entirely unknown.
Warnings
- —No API documentation available — docs, pricing, and README pages all render only a wallet-connect prompt with no content.
- —Request body schema and response format for the OHLCV endpoint are unknown; callers must discover experimentally.
- —The provider hosts many endpoints at the same domain; quality and reliability of individual endpoints is unverified.
- —No OpenAPI spec or output schema beyond the basic x402 challenge metadata.
Citations
- —Endpoint returns HTTP 402 with x402 version 1 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv
- —Provider advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, API, pricing, and README pages contain no substantive documentationhttps://lowpaymentfee.com/docs