# Carbon & Cashmere Bittensor Subnet Emission Trend API

> Carbon & Cashmere Bittensor Subnet Emission Trend API is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns hourly emission trend time-series data (active validators, total stake, total incentive) for a specific Bittensor subnet over a rolling 7-day window.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/bittensor-derivatives/subnet/%7Bnetuid%7D/emission-trend
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-bittensor-subnet-emission-trend-api-cd7aada0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1855kXwQjUOS0SIt6llW2

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 carbon-cashmere-bittensor-subnet-emission-trend-api-cd7aada0
```

Example prompt: Can you pull the 7-day emission trend for Bittensor subnet 1 — I want to see how the average active validators, total stake, and incentive have been moving hour by hour?

## When to prefer this

Use this endpoint when you need granular hourly time-series emission analytics for a specific Bittensor subnet — particularly useful for tracking validator participation, staking dynamics, and incentive flow trends over a rolling 7-day window. Prefer this over generic crypto price endpoints when your focus is Bittensor subnet-level on-chain emission metrics.

## Known failure modes

- Invalid or non-existent netuid returns an error or empty series
- Payment not included or insufficient USDC results in HTTP 402
- Rate limiting or service unavailability returns HTTP 429 or 503
- Malformed path parameter (non-integer netuid) may return HTTP 400

## How this service works

Professional crypto market intelligence. Real-time prices, signals, and market scoring.

## Output

A JSON object containing the subnet ID, a series of up to 168 hourly data points each with average active validator count, average total stake, and average total incentive, plus the window label ('7d') and sample count.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "netuid": 1,
  "series": [
   {
    "hour": "...",
    "avg_n_active": 27,
    "avg_total_stake": 2525000,
    "avg_total_incentive": 0.999
   }
  ],
  "window": "7d",
  "samples": 168
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-bittensor-subnet-emission-trend-api-cd7aada0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.carbon-cashmere.de](https://www.zero.xyz/host/api.carbon-cashmere.de/llms.txt)