USDC OHLCV candlestick data for crypto assets, paid per-request via x402 on Base.
What it does
This endpoint at lowpaymentfee.com provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the USDC cryptocurrency pair. It is part of a broader suite of finance and crypto APIs offered by the same provider, all gated behind the x402 payment protocol on the Base network.
Each request costs $0.02 in USDC (maxAmountRequired of 20,000 base units with 6 decimals = $0.02), settled on-chain to the provider's wallet on Base. The endpoint accepts POST requests and returns JSON. No API keys or account registration are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The provider advertises no rate limits and instant access.
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, the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The specific request body format (e.g., which trading pair, timeframe, or date range parameters are accepted) and the response schema for the OHLCV data are unknown from the available material.
Capabilities
Use cases
- —Fetching historical OHLCV candlestick data for USDC trading pairs
- —Building crypto trading dashboards with per-request payment
- —Programmatic access to crypto market data without API key management
- —Agent-driven market analysis workflows that pay per call
Fit
Best for
- —Developers needing pay-per-use crypto OHLCV data without subscriptions
- —AI agents that can settle x402 payments on Base
- —Projects wanting keyless, on-demand crypto market data
Not for
- —High-frequency trading requiring sub-second latency and bulk data (no documented batch mode)
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone without a Base-compatible USDC wallet for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/crypto/USDC/ohlcv \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{"pair": "USDC/ETH", "interval": "1h"}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The specific parameters accepted by the OHLCV endpoint are entirely unknown. The listing is effectively a stub.
Warnings
- —No API documentation available — docs, API, pricing, and README pages all render only 'Connect wallet' with no content
- —No OpenAPI or schema definition found; request body format and response structure are unknown
- —The example_request_json is speculative — actual required parameters are undocumented
- —Provider lists many endpoints across diverse categories (AI, analytics, geocoding, etc.) all at $0.02 — unclear if all are fully implemented
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/crypto/USDC/ohlcv
- —All APIs are 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/crypto/USDC/ohlcv
- —The endpoint is listed under Finance & Web3 category alongside price feeds, exchange rates, token quotes, and gas estimateshttps://lowpaymentfee.com