# Carbon Cashmere 3-Way Oracle Consensus

> Carbon Cashmere 3-Way Oracle Consensus is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.2/call, status down (last checked 2026-09-15).

Returns price quotes from DIA, Pyth, and CoinGecko for a given coin, with pairwise spreads, median consensus, and outlier detection for high-trust price verification.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/oracle-consensus-3way/:coin
- Price: $0.2/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-8745ea9e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6vM8mBwm1ByjLzuB92LN7

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-8745ea9e
```

Example prompt: Can you run a 3-way oracle consensus check on BTC — I want to see the latest prices from DIA, Pyth, and CoinGecko side by side, their pairwise spreads, the median consensus, and whether any source looks like an outlier?

## When to prefer this

Use this endpoint when you need high-confidence price verification for a cryptocurrency and want to cross-check multiple oracle sources simultaneously. Ideal for detecting oracle manipulation, validating DeFi liquidation prices, or any scenario where a single oracle source is insufficient for trust. Prefer over single-source price feeds when security or auditability of the price matters.

## Known failure modes

- Unknown coin symbol returns 404 or empty result
- One or more oracle sources temporarily unavailable, causing partial data
- Stale data if an upstream oracle has not updated recently
- Payment failure (x402) if USDC balance is insufficient
- Rate limiting if called too frequently

## How this service works

3-way oracle consensus (DIA + Pyth + CoinGecko) per coin. Returns latest from each source, pairwise spreads, median consensus, outlier detection. Use cases: high-trust price verification, oracle manipulation detection. Informational only.

## Output

Returns the latest price from each of the three oracle sources (DIA, Pyth, CoinGecko), pairwise spread percentages between each pair, a computed median consensus price, and outlier detection flags indicating if any source deviates significantly from consensus.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-8745ea9e/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)