# Crypto Market Rotation & Altseason Regime Detector

> Crypto Market Rotation & Altseason Regime Detector is a paid API for AI agents from api.n0brains.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Detects crypto capital rotation regimes — whether money is flowing into BTC, ETH, or altcoins — and returns sector breadth, relative strength, and which coins are rotating in vs out.

## Facts

- Endpoint: GET https://api.n0brains.com/x402/rotation
- Price: $0.002/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-rotation-altseason-regime-detector-4f32b3b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HPuBqhHlspD-w38vM7QVU

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-rotation-altseason-regime-detector-4f32b3b2
```

Example prompt: Is the crypto market in altseason right now, or is capital rotating back into BTC — and which coins are currently leading the rotation in vs out?

## When to prefer this

Use this endpoint when an agent needs to determine the current crypto market regime (BTC vs ETH vs altcoin rotation) in real time, identify which specific coins are gaining or losing capital flows, or assess whether altseason conditions are present. Prefer over generic price APIs when the question is about relative capital rotation and sector leadership rather than absolute price levels.

## Known failure modes

- Insufficient market data returns sufficient_data: false with empty leaders/laggards arrays
- Payment not included or invalid returns 402 Payment Required
- Service unavailable returns 5xx with no rotation data
- Rate limiting may occur under high request frequency

## How this service works

Crypto market rotation and altseason regime detector: sector/asset rotation score, breadth, relative strength, and which coins are rotating in vs out. Tells an agent whether capital is flowing to BTC, ETH, or alts right now. Not financial advice.

## Output

Returns an object with a rotation/sector score, market breadth metrics, relative strength rankings, a list of leaders (coins rotating in with strong capital inflow) and laggards (coins rotating out), plus a sufficient_data boolean indicating whether the signal has enough data to be reliable.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "leaders": {
       "type": "array"
      },
      "laggards": {
       "type": "array"
      },
      "sufficient_data": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-market-rotation-altseason-regime-detector-4f32b3b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.n0brains.com](https://www.zero.xyz/host/api.n0brains.com/llms.txt)