# Crypto Market Dominance (BTC, ETH, USDT)

> Crypto Market Dominance (BTC, ETH, USDT) is a paid API for AI agents from asistent-crypto.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns BTC, ETH, and USDT dominance as a percentage of total crypto market cap, serving as a regime filter for altcoin positioning and risk-on/off signals.

## Facts

- Endpoint: POST https://asistent-crypto.vercel.app/api/x402/data/dominance
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-dominance-btc-eth-usdt-c785f9bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8PgWw-Z1u4IBlgVB1m_ym

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 crypto-market-dominance-btc-eth-usdt-c785f9bf -d '<json body>'
```

Example prompt: What are the current BTC, ETH, and USDT dominance percentages right now, and is the trend pointing toward risk-on rotation into altcoins or risk-off capital flight to stablecoins?

## When to prefer this

Choose this endpoint when you need a quick, quantitative read on the macro crypto market regime before making altcoin sizing decisions. It is ideal for trading bots, portfolio rebalancing agents, and risk management workflows that need BTC/ETH/USDT dominance in a single call without requiring a full market data subscription. Prefer this over general market cap endpoints when the specific question is about capital rotation and regime classification rather than individual coin prices.

## Known failure modes

- Upstream market data provider unavailable — returns 5xx error
- Stale data if upstream provider has not refreshed recently — dominance figures may lag by minutes
- Payment not processed correctly — call rejected before data is returned
- Rate limiting if called in very rapid succession

## How this service works

BTC, ETH and USDT dominance as a share of total crypto market cap — the regime filter to check before sizing any altcoin position. Rising BTC dominance means capital rotating to relative safety; rising USDT dominance means capital leaving for stablecoins, a broader risk-off. Falling BTC dominance with rising ETH dominance is the classic rotation signal.

## Output

Returns BTC dominance, ETH dominance, and USDT dominance each as a percentage of total crypto market capitalization, along with contextual signals that indicate whether capital is rotating toward risk assets (altcoins, ETH) or toward relative safety (BTC) or fully off-risk (USDT stablecoins).

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "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/crypto-market-dominance-btc-eth-usdt-c785f9bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from asistent-crypto.vercel.app](https://www.zero.xyz/host/asistent-crypto.vercel.app/llms.txt)