# Carbon Cashmere BTC Block Deep Analytics

> Carbon Cashmere BTC Block Deep Analytics 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 deep per-block Bitcoin analytics by block height, including miner-pool attribution, Taproot/witness adoption, Ordinals inscriptions, fee percentiles, UTXO delta, SegWit %, output BTC, and block weight.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/btc-derivatives/blocks/:height
- 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-ba3b9401
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-lDcJZYtZnVtRoXXBBu6_

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-ba3b9401
```

Example prompt: Pull the deep block analytics for Bitcoin block height 840000 — I want miner pool attribution, Taproot and SegWit adoption percentages, the Ordinals inscription count, OP_RETURN byte volume, fee percentiles at the 10th/25th/50th/75th/90th, UTXO delta, total output BTC, and block weight.

## When to prefer this

Choose this endpoint when you need granular, per-block Bitcoin analytics far beyond what standard block explorers expose — specifically miner pool attribution, Ordinals inscription counts, Taproot/SegWit adoption metrics, detailed fee percentile distributions, and OP_RETURN volumes for a precise block height. Ideal for blockchain researchers, indexer builders, and explorer developers who need structured machine-readable block-level data from an own-node source rather than a third-party aggregator.

## Known failure modes

- Block height not yet mined — returns 404 or not-found error
- Block height out of valid range — returns 400 bad request
- Node temporarily out of sync — may return stale or missing data
- Invalid non-integer height parameter — returns validation error
- Rate limit or payment failure — returns 402 or 429 error

## How this service works

Deep per-block Bitcoin extract. Returns miner-pool attribution, witness/taproot adoption %, Ordinals inscription count, OP_RETURN byte volume, fee percentiles (10/25/50/75/90), UTXO delta, segwit %, total output BTC, block weight.

## Output

A rich JSON object for the requested block height including: miner pool name/attribution, witness and Taproot adoption percentage, count of Ordinals inscriptions, OP_RETURN byte volume, fee percentiles at p10/p25/p50/p75/p90, UTXO delta (created minus spent), SegWit transaction percentage, total BTC output value, and block weight in weight units — all sourced from a live own-node ZMQ rawblock parser.

## 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-ba3b9401/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)