# Carbon Cashmere Subtensor Event Stream

> Carbon Cashmere Subtensor Event Stream is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Streams filtered Bittensor substrate events from finalized blocks, capturing events that may disappear from public lite-node APIs

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/subtensor-derivatives/event-stream
- Price: $0.03/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-0f3d05c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JaNMkopZR22Dagd0fx11n

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-0f3d05c1
```

Example prompt: Can you stream me the latest finalized block events from the Bittensor Subtensor chain, filtered to just the SubtensorModule — I need to catch events that might not show up on public lite-node APIs?

## When to prefer this

Use this endpoint when you need real-time or recent Bittensor substrate events from finalized blocks, especially when you require filtering by specific modules or event types, or when public lite-node APIs are dropping events. Ideal for monitoring TAO network activity, tracking validator/miner events, or building Bittensor analytics pipelines that need complete event coverage.

## Known failure modes

- Invalid module or event filter returns empty or error response
- Node connectivity issues may delay or interrupt the event stream
- Truncated response if event volume is very high (response size limit reached)
- Unknown module/event names silently return no results

## How this service works

Filtered Bittensor substrate event stream from finalized blocks. Module/event filters supported. Captures events that disappear from public lite-node APIs.

## Output

A stream of substrate events from finalized Bittensor blocks, optionally filtered by module and/or event type. Includes events that may have disappeared from public lite-node APIs, providing more complete coverage of on-chain activity.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "events": [
   {
    "event_id": "NeuronRegistered",
    "attributes": {
     "uid": 254,
     "netuid": 123
    },
    "block_number": 8204514
   }
  ],
  "filter": {
   "event": "NeuronRegistered",
   "module": "SubtensorModule"
  },
  "returned": 12,
  "since_minutes": 60
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-0f3d05c1/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)