OHLCV candlestick data for API3 token, paid per-request via x402 on Base.
What it does
This endpoint provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the API3 cryptocurrency token. It is hosted on lowpaymentfee.com, a platform offering a variety of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint at `/api/v1/crypto/API3/ohlcv` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, advertising a maximum cost of $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — payment is handled entirely through the x402 `X-PAYMENT` header. The platform advertises instant access with no minimums or commitments.
Documentation 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 schema, no request/response examples, and no description of accepted parameters (e.g., time range, interval, exchange). The endpoint path suggests it returns OHLCV data specifically for the API3 token, but the exact request format and response structure are unknown.
Capabilities
Use cases
- —Fetching historical OHLCV candlestick data for the API3 token
- —Building trading dashboards or charting tools that include API3
- —Programmatic analysis of API3 price movements over time
- —Agent-driven crypto market research without API key management
Fit
Best for
- —Developers needing quick, keyless access to API3 OHLCV data
- —AI agents that can settle micropayments via x402 on Base
- —Projects that want pay-per-call pricing with no subscription overhead
Not for
- —Users needing OHLCV data for tokens other than API3 (different endpoints exist per token)
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users who need detailed API documentation or schema validation before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/crypto/API3/ohlcv \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The x402 challenge confirms the endpoint is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The actual request parameters and response format are entirely unknown, making this effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema provided for request or response
- —Request parameters (time range, interval, exchange, etc.) are completely undocumented
- —Response format is unknown — no example responses available
- —Cannot verify what data source backs the OHLCV data
Citations
- —The endpoint returns a 402 challenge advertising USDC payment on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/crypto/API3/ohlcv
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across data analytics, AI/ML, finance/crypto, and infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (docs, api, pricing, README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs