# Crest Global Crypto Market Overview

> Crest Global Crypto Market Overview is a paid API for AI agents from data.crestsystems.ai, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).

Returns a global cryptocurrency market snapshot including total market cap, BTC/ETH dominance percentages, 24-hour trading volume, and active crypto count.

## Facts

- Endpoint: GET https://data.crestsystems.ai/data/global
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/data-crestsystems-ai-171e8af2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xjpLGJmalfWAKktgdmWst

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 data-crestsystems-ai-171e8af2
```

Example prompt: What does the overall crypto market look like right now — total market cap, Bitcoin and Ethereum dominance, 24-hour volume, and how many active coins are there?

## When to prefer this

Use this endpoint when you need a high-level, aggregated view of the entire cryptocurrency market rather than data on individual tokens. Ideal for dashboards, market condition checks, or any workflow that needs BTC/ETH dominance and total market cap as context before making token-level decisions.

## Known failure modes

- Upstream data provider outage returning 503 or empty response
- Stale data if the market data feed has not refreshed recently
- x402 payment failure if USDC balance is insufficient or wallet not configured
- Rate limiting if the endpoint is called too frequently

## How this service works

Crest · global_market — Fetch global crypto market overview. Returns total market cap, BTC and ETH dominance percentages, 24h trading volume, and active cryptocurrency count.

## Output

Returns a global crypto market snapshot with total market capitalization, Bitcoin dominance percentage, Ethereum dominance percentage, total 24-hour trading volume across all assets, and the number of active cryptocurrencies tracked.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/data-crestsystems-ai-171e8af2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.crestsystems.ai](https://www.zero.xyz/host/data.crestsystems.ai/llms.txt)