# Blockchain IQ — Crypto Price History

> Blockchain IQ — Crypto Price History is a paid API for AI agents from www.blockchainiq.co, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).

Returns daily historical USD price data for a specified cryptocurrency over a configurable number of days

## Facts

- Endpoint: GET https://www.blockchainiq.co/api/x402/v1/history/%7BcoinId%7D?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-iq-crypto-price-history-4e4e8e44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jJ0P3yJAwK_89D3anpQoI

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 blockchain-iq-crypto-price-history-4e4e8e44
```

Example prompt: Pull up the daily price history for Bitcoin from Blockchain IQ for the last 365 days so I can see how it's trended.

## When to prefer this

Choose this endpoint when you need analyst-verified daily historical price data for individual cryptocurrencies at low cost ($0.03/call), especially when you want reliable CoinGecko-mapped coin IDs and clean date/price_usd output for charting, analysis, or backtesting — without paying institutional data subscription fees. Prefer this over raw CoinGecko API calls when you want a curated, pay-per-use model with no API key management.

## Known failure modes

- Invalid coinId returns an error or empty dataset — must use exact CoinGecko coin identifier (e.g. 'bitcoin', not 'BTC')
- Days parameter outside 1-730 range will be rejected by schema validation
- Payment failure (x402) if USDC balance is insufficient — endpoint requires $0.03 USDC per call
- Network timeout if the upstream data provider is slow or unavailable
- Unknown or delisted coins may return no data or a not-found error

## How this service works

Analyst-verified crypto research for individual investors — without the institutional price tag.

## Output

Returns a JSON object with an array of daily records, each containing a date string and a price_usd value, plus source attribution ('Blockchain IQ'), a disclaimer noting the data is not investment advice, and a link to the terms of service.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "coinId"
     ],
     "properties": {
      "coinId": {
       "type": "string",
       "description": "CoinGecko coin id, e.g. bitcoin"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "days": {
       "type": "integer",
       "maximum": 730,
       "minimum": 1,
       "description": "Days of history (default 365)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "date": "2026-09-27",
    "price_usd": 4123.45
   }
  ],
  "terms": "https://www.blockchainiq.co/terms",
  "source": "Blockchain IQ",
  "disclaimer": "Market data and analysis, not investment advice."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-iq-crypto-price-history-4e4e8e44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.blockchainiq.co](https://www.zero.xyz/host/www.blockchainiq.co/llms.txt)