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	$0.005	Get historical OHLCV candles for any token by ID or contract address
token_get_ohlcv_history	POST	/api/candles	$0.005	Get historical OHLCV candles for any token by ID or contract address (POST variant)

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).

token_get_ohlcv_history

Use this when you need historical price candlestick data for any token. Returns OHLCV candles in JSON. POST variant of token_get_ohlcv_history -- same params passed as JSON body instead of query string.

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"
• "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