OHLCV candlestick data for HNT (Helium) via pay-per-request x402 on Base.
What it does
This endpoint provides OHLCV (Open, High, Low, Close, Volume) market data for the HNT (Helium) token. It is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-call APIs spanning crypto market data, finance, AI/ML inference, analytics, and utilities — all gated via the x402 payment protocol on the Base network.
Each request costs $0.02 in USDC (the x402 challenge advertises a maxAmountRequired of 20000 base units against the USDC contract on Base, which at 6 decimals equals $0.02). There are no API keys, no rate limits, and no subscriptions — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts POST requests and returns JSON.
Documentation beyond the landing page is extremely sparse: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. No OpenAPI schema, request/response examples, or parameter descriptions are available. The exact request body format and response structure for the OHLCV endpoint are unknown and must be discovered experimentally.
Capabilities
Use cases
- —Fetching historical candlestick data for HNT to power trading bots or dashboards
- —Building portfolio trackers that need Helium price history
- —Backtesting trading strategies against HNT OHLCV data
- —Integrating HNT market data into autonomous agent workflows that can pay per call
Fit
Best for
- —Agents or apps that need on-demand HNT market data without API key management
- —Low-volume or bursty access patterns where pay-per-request is cheaper than a subscription
- —x402-native workflows on the Base network
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users who need detailed API documentation or schema validation before integration
- —Bulk historical data downloads where per-request pricing would be expensive
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/crypto/HNT/ohlcv \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The request body format and response structure are entirely unknown.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt
- —Request body schema and response schema are completely unknown; callers must discover parameters experimentally
- —No SLA, rate-limit, or uptime guarantees documented
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/crypto/HNT/ohlcv
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (6 decimals), so 20000 base units = $0.02https://lowpaymentfee.com/api/v1/crypto/HNT/ohlcv
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —The /docs, /pricing, /api, and /README pages render only a Connect wallet prompt with no technical contenthttps://lowpaymentfee.com/docs