# Silverback DeFi Correlation Matrix

> Silverback DeFi Correlation Matrix is a paid API for AI agents from silverback-x402.onrender.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-14).

Computes a correlation matrix across DeFi tokens or assets on Base chain to reveal statistical relationships between price movements

## Facts

- Endpoint: POST https://silverback-x402.onrender.com/api/v1/correlation-matrix
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/silverback-x402-onrender-com-0c616fc1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FLa_4Hmq64cZC7R-p6-aH

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 silverback-x402-onrender-com-0c616fc1 -d '<json body>'
```

Example prompt: Can you run a correlation matrix on WETH, USDC, cbBTC, AERO, and DEGEN tokens on Base chain so I can see which ones move together and identify diversification opportunities in my portfolio?

## When to prefer this

Use this endpoint when you need quantitative statistical relationships between multiple DeFi tokens on Base chain, particularly for portfolio diversification, risk management, or pair-trading strategies. Prefer this over general market data endpoints when you specifically need a matrix of pairwise correlations rather than individual price feeds.

## Known failure modes

- Invalid or unrecognized token address returns error
- Insufficient historical price data for a token
- Too many tokens requested at once exceeds limit
- Token not available on Base chain
- Network or RPC timeout fetching price data
- Payment not processed correctly via x402 protocol

## Output

A correlation matrix showing pairwise Pearson (or similar) correlation coefficients between the requested token price series on Base chain, allowing the agent to identify positively correlated, negatively correlated, and uncorrelated asset pairs for portfolio construction or risk analysis.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/silverback-x402-onrender-com-0c616fc1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from silverback-x402.onrender.com](https://www.zero.xyz/host/silverback-x402.onrender.com/llms.txt)