# Wintergreen OHLCV Data Endpoint

> Wintergreen OHLCV Data Endpoint is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Returns OHLCV (open, high, low, close, volume) candlestick data for a given crypto symbol and interval, gated by a $0.001 USDC micropayment via the x402 protocol.

## Facts

- Endpoint: GET https://x402.wintergreen.uk/api/v1/quant/ohlcv
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-ohlcv-data-endpoint-ba8b74ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rXkVQwvP8dU8pWlDsBoTB

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability wintergreen-ohlcv-data-endpoint-ba8b74ca
```

Example prompt: Fetch the last 100 hourly OHLCV candles for BTC from Wintergreen's quant data endpoint — I need the open, high, low, close, and volume bars for my backtesting model.

## When to prefer this

Choose this endpoint when you need raw OHLCV candlestick data for crypto assets and are operating within an x402-capable agent that can handle micropayments in USDC on Base. It is well-suited for quant workflows, backtesting pipelines, and signal generation where per-call costs of $0.001 are acceptable. Prefer it over free public endpoints when you need data integrated into a paid Wintergreen intelligence workflow or when other Wintergreen quant signals (funding, liquidation, regime) are also being consumed.

## Known failure modes

- HTTP 402 returned if payment header is missing or invalid — agent must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header
- Invalid symbol returns error or empty dataset
- Unsupported interval value may return error
- Limit parameter out of range may cause error or truncation
- Network timeout if Wintergreen endpoint is unavailable

## How this service works

Payment-gated crypto trading intelligence for AI agents.
    
## Categories
- **Hyperliquid Signals**: Real-time funding divergence, lead-lag correlation, liquidation clusters, session volume area levels
- **Quant Methodology**: Backtesting walk-forward validation, strategy generation with kill battery (19 rules), risk management with Kelly sizing, regime detection, execution frameworks, agent orchestration
- **Market Insights**: 22 crypto microstructure observations — funding, liquidation, orderbook, regime, flow, anomaly
- **Power Markets**: ERCOT field guide, merit-order model, duck curve analysis
- **Career Guides**: Firefighter oral board prep, medical coding, ATSA, contractor estimating
- **Trust Scoring**: x402 endpoint verification, P2D badges

## Payment
All paid endpoints return HTTP 402 with USDC on Base (eip155:8453). 
Sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header.
PayTo: 0xAe9834d71F1Bd989A0dc17593451af823E31CeeD

## Output

A list of OHLCV candlestick records for the requested symbol and interval, each containing open, high, low, close, and volume values. The number of records returned is controlled by the 'limit' parameter. Exact response schema is unspecified but expected to be JSON array of candle objects.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer"
  },
  "symbol": {
   "type": "string"
  },
  "interval": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-ohlcv-data-endpoint-ba8b74ca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.wintergreen.uk](https://www.zero.xyz/host/x402.wintergreen.uk/llms.txt)