# Bittensor Subnet Emission & Stake Trend API

> Bittensor Subnet Emission & Stake 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 and stake trend analytics for a specified Bittensor subnet (netuid), over 1h/24h/7d/30d windows, derived from metagraph snapshots.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/bittensor-derivatives/subnet/:netuid/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/bittensor-subnet-emission-stake-trend-api-4fb56889
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4caw0WFsglCEM1YIpjSQz

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 bittensor-subnet-emission-stake-trend-api-4fb56889
```

Example prompt: Can you pull the emission and stake trend for Bittensor subnet 64? I want to see how its momentum has been tracking over the last 24 hours.

## When to prefer this

Use this endpoint when you need time-series emission and stake momentum analytics specifically for a Bittensor subnet identified by netuid. Prefer this over generic TAO network info endpoints when you need trend data across multiple time windows (1h/24h/7d/30d) derived from metagraph snapshots, rather than point-in-time network stats.

## Known failure modes

- Invalid netuid format (must be numeric string 0-511) returns 400 or validation error
- Netuid does not exist on the Bittensor network returns empty or error response
- Missing x402 payment header or insufficient USDC balance returns 402 Payment Required
- Rate limiting or upstream metagraph data unavailability returns 503 or timeout
- Network error or service downtime returns 5xx

## How this service works

Hourly emission and stake trend for a Bittensor subnet (window: 1h/24h/7d/30d). Derived from bittensor_metagraph snapshots. AI agent API for subnet-momentum tracking. Informational research data — not investment advice.

## Output

Returns hourly emission rate and stake trend metrics for the requested Bittensor subnet (netuid), computed over rolling 1h, 24h, 7d, and 30d windows from bittensor_metagraph snapshots. Includes momentum indicators useful for subnet research.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "netuid"
     ],
     "properties": {
      "netuid": {
       "type": "string",
       "pattern": "^\\d{1,3}$",
       "examples": [
        "3",
        "64",
        "123"
       ],
       "description": "Bittensor subnet UID (0-511) as URL path segment."
      }
     },
     "additionalProperties": false
    },
    "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/bittensor-subnet-emission-stake-trend-api-4fb56889/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)