# Bittensor All-Subnets Snapshot API

> Bittensor All-Subnets Snapshot API is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns a snapshot of all 129 Bittensor mainnet subnets with burn, neuron counts, owner, modality, and alpha-price data joined from subnet info and latest alpha prices.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/bittensor-derivatives/subnets-all
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-40f11510
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n_kZLIx-zt1xpdVSfFMTN

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 api-carbon-cashmere-de-40f11510
```

Example prompt: Can you pull a full snapshot of all 129 Bittensor mainnet subnets right now — I want to see each subnet's burn rate, alpha price, owner, modality, and neuron count so I can build a market overview?

## When to prefer this

Use this endpoint when you need a broad, cross-subnet market overview of the entire Bittensor ecosystem in a single call — ideal for dashboards, comparative subnet research, or price screening across all alpha tokens. Prefer it over per-subnet endpoints when you need all 129 subnets at once rather than drilling into a single subnet's neuron-level detail.

## Known failure modes

- Data freshness lag if the underlying Subtensor node is behind
- Empty or partial response if subnet count changes from 129
- Timeout if the aggregation query is slow during high network activity
- HTTP 402 if payment is not correctly attached via x402 protocol

## How this service works

Snapshot of all 129 Bittensor mainnet subnets — burn, neurons, owner, modality, alpha-price. For cross-subnet research and market-overview dashboards.

## Output

A JSON array of all 129 Bittensor mainnet subnets, each record containing subnet ID, burn rate, neuron count, owner address, modality type, and alpha price — sourced from a join of bittensor_subnet_info and the latest bittensor_alpha_prices tables.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 129,
  "subnets": [
   {
    "netuid": 1,
    "burn_tao": 0.0006,
    "modality": "text",
    "subnetwork_n": 256,
    "alpha_price_usd": 0.74
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-40f11510/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)