Token OHLCV History API

Historical OHLCV candles for any token -- daily, 4h, 1h intervals. CoinGecko + GeckoTerminal powered. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "token-ohlcv": {
      "url": "https://token-ohlcv.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://token-ohlcv.api.klymax402.com/api/candles"
-> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
| token_get_ohlcv_history | GET | /api/candles | $0.002 | Get historical OHLCV candles for any token by ID or contract address |

token_get_ohlcv_history

Use this when you need historical price candlestick data for any token. Returns OHLCV candles in JSON.

Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| token | string | no | CoinGecko token ID (e.g. bitcoin, ethereum, solana). Use this OR contract+chain. |
| contract | string | no | On-chain contract address (e.g. 0x...). Use with chain parameter for GeckoTerminal lookup. |
| chain | string | no | Blockchain network for contract lookup: base, ethereum, solana, arbitrum, polygon, optimism, bsc. |
| days | number | no | Number of days of history (default 30, max 365). For 1h interval max 2 days, for 4h max 90 days. |
| interval | string | no | Candle interval: daily (default), 4h (if days <= 90), 1h (if days <= 2). |

Returns

- candles -- array of candlestick objects with timestamp, open, high, low, close, volume
- token -- token identifier used
- interval -- candle interval (daily, 4h, 1h)
- days -- number of days of history returned
- source -- data source (CoinGecko or GeckoTerminal)

Example response:

{"candles":[{"timestamp":1712966400,"open":3105.20,"high":3142.80,"low":3089.50,"close":3128.60,"volume":1250000000}],"token":"ethereum","interval":"daily","days":30,"source":"CoinGecko"}

When to use: technical analysis, backtesting, trend detection, and charting. Supports 10,000+ tokens by CoinGecko ID or on-chain contract address via GeckoTerminal.

Not for: swap quotes (use dex_get_swap_quote), news (use crypto_get_latest_news), funding rates (use perp_scan_funding_arbitrage).

Example agent prompts

- "Historical price candlestick data for any token"

Payment

- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (eip155:8453)
- Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats

License

MIT