# Carbon Cashmere Subtensor Block Events

> Carbon Cashmere Subtensor Block Events 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 all Bittensor substrate events for a single finalized block, including event index, phase, module ID, event ID, and attributes.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/subtensor-derivatives/events/:block_number
- 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/api-carbon-cashmere-de-ae2aadf7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u_XoNfPlSC0Yw0uAaIK7a

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-ae2aadf7
```

Example prompt: Pull all Bittensor substrate events for finalized block 3500000 — I need the event index, phase, module ID, event ID, and attributes for each event so I can do a forensic audit of what happened in that block.

## When to prefer this

Use this endpoint when you need granular, event-level forensic detail for a specific Bittensor block — e.g. auditing stake transfers, weight updates, or emission events at an exact block. Prefer this over aggregate analytics endpoints when you need raw substrate event data rather than summarized metrics.

## Known failure modes

- Block number not yet finalized — returns error if block is still pending
- Block number out of range or does not exist — 404 or empty response
- Node sync lag — live node may not have indexed very recent blocks
- Invalid block_number format (non-integer) — 400 bad request
- Rate limiting or payment failure — 402 or 429 response

## How this service works

All Bittensor substrate events for a single finalized block (event_idx, phase, module_id, event_id, attributes). AI agent API for detailed forensic analysis of specific blocks. Informational research data — not investment advice.

## Output

A list of all substrate events emitted in the specified finalized Bittensor block, each containing: event_idx (position in block), phase (initialization/apply extrinsic/finalization), module_id (pallet name), event_id (event variant), and attributes (decoded parameters/values associated with the event).

## 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"
    },
    "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/api-carbon-cashmere-de-ae2aadf7/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)