# Bittensor NeuronRegistered Registration Pulse

> Bittensor NeuronRegistered Registration Pulse 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).

Returns hourly counts of new neuron registrations and block counts on the Bittensor network, enabling subnet growth and registration-burn pressure tracking.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/subtensor-derivatives/registration-pulse
- 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-4d4ad2b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0ufZi3fTJNxeba92IYjHf

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-4d4ad2b2
```

Example prompt: Show me the hourly Bittensor neuron registration pulse for today — I want to see how many new neurons joined per hour so I can assess subnet growth and registration burn pressure.

## When to prefer this

Use this endpoint when you need time-series registration activity data at hourly resolution to detect subnet expansion, contraction, or unusual registration bursts. Prefer this over full metagraph snapshots when you only need registration volume trends rather than per-neuron stake/trust details.

## Known failure modes

- Node sync lag may return stale or incomplete data for the most recent hour
- Network outages on the Subtensor lite node may return 5xx errors
- No query parameters supported yet — cannot filter by specific subnet (netuid)
- Partial hour data for the current in-progress hour may undercount registrations

## How this service works

Bittensor NeuronRegistered count per hour. Tracks new neurons joining subnets — useful for detecting subnet growth/decay and registration-burn pressure. AI agent API for subnet-health analysts. Informational research data — not investment advice.

## Output

An array of hourly data points, each containing a UTC timestamp, the number of finalized blocks in that hour, and the number of NeuronRegistered events (new neurons joining subnets) in that hour. Covers recent rolling hours from the Bittensor Subtensor chain.

## 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": {
  "hourly": [
   {
    "hour": "...",
    "blocks": 4,
    "registrations": 5
   }
  ],
  "window": "24h",
  "summary": {
   "hours_with_data": 24,
   "total_registrations": 124
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-4d4ad2b2/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)