# Carbon & Cashmere Oracle Consensus 3-Way Price Feed

> Carbon & Cashmere Oracle Consensus 3-Way Price Feed is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status down (last checked 2026-09-16).

Returns a 3-way consensus crypto price for a given coin, aggregating DIA, Pyth, and CoinGecko with spread analysis and outlier detection

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/oracle-consensus-3way/%7Bcoin%7D
- Price: $0.05/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-oracle-consensus-3-way-price-feed-fa7183eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jrUMOgAEaH9xkTOw9RF7W

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 carbon-cashmere-oracle-consensus-3-way-price-feed-fa7183eb
```

Example prompt: What's the 3-way oracle consensus price for BTC right now — show me what DIA, Pyth, and CoinGecko are each reporting and flag any outlier?

## When to prefer this

Use this endpoint when you need a cross-validated, multi-oracle crypto price rather than trusting a single data source — ideal for DeFi applications, trading bots, or any scenario where price integrity and outlier detection matter. Prefer this over a single-source price feed when spread analysis or oracle health monitoring is required.

## Known failure modes

- Unknown or unsupported coin symbol returns 404 or empty response
- One or more oracles temporarily unavailable reduces consensus quality
- Stale timestamps if upstream oracles lag
- Payment failure (x402) blocks request if USDC not attached
- High volatility periods may produce wide spreads flagged as outliers

## How this service works

Professional crypto market intelligence. Real-time prices, signals, and market scoring.

## Output

A JSON object containing the coin symbol, per-source price entries (with timestamps, source name, price, and optional confidence), a consensus block with mean USD, median USD, max spread percent, and the identified outlier source with its deviation in percent and USD, plus pairwise spread percentages between all three oracle pairs.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "sources": [
   {
    "ts": "2026-05-09T21:31:56Z",
    "name": "DIA",
    "price": 80790.02
   },
   {
    "ts": "2026-05-09T21:25:03Z",
    "name": "Pyth",
    "price": 80785.39,
    "confidence": 19.22
   },
   {
    "ts": "2026-05-09T21:25:00Z",
    "name": "CoinGecko",
    "price": 80812
   }
  ],
  "consensus": {
   "outlier": {
    "name": "CoinGecko",
    "deviation_pct": 0.027,
    "deviation_abs_usd": 21.98
   },
   "mean_usd": 80795.8,
   "median_usd": 80790.02,
   "max_spread_pct": 0.033
  },
  "pairwise_spreads": [
   {
    "a": "DIA",
    "b": "Pyth",
    "spread_pct": 0.0057
   },
   {
    "a": "DIA",
    "b": "CoinGecko",
    "spread_pct": -0.0272
   },
   {
    "a": "Pyth",
    "b": "CoinGecko",
    "spread_pct": -0.0329
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-oracle-consensus-3-way-price-feed-fa7183eb/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)