# Xynaptic Crypto Correlation

> Xynaptic Crypto Correlation is a paid API for AI agents from api.xynaptic.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Returns a Pearson correlation matrix of daily returns for 2–5 cryptocurrencies over a 90-day window to assess portfolio diversification.

## Facts

- Endpoint: GET https://api.xynaptic.io/v1/crypto-correlation?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xynaptic-crypto-correlation-130bf9b5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9HFYRsCRZbvlpjbqYgLZZ

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 xynaptic-crypto-correlation-130bf9b5
```

Example prompt: Can you run a 90-day Pearson correlation check on bitcoin, ethereum, and solana so I can see how much they move together and whether they actually diversify my portfolio?

## When to prefer this

Use this endpoint when you need a quantitative, statistics-based diversification check for a specific set of 2–5 cryptocurrencies using a standardized 90-day Pearson correlation methodology. Prefer it over generic price APIs when your goal is understanding co-movement and portfolio risk, not just fetching prices.

## Known failure modes

- Fewer than 2 or more than 5 coins specified — request rejected
- Unrecognized coin identifier (e.g. misspelled ticker or unsupported asset) — error returned
- Insufficient historical data for a newly listed coin — partial or error response
- Payment failure or missing x402 payment header — 402 Payment Required

## How this service works

Xynaptic Crypto Correlation — Pearson correlation matrix of daily returns for 2-5 coins over 90 days: the honest diversification check. GET ?coins=bitcoin,ethereum,solana.

## Output

A Pearson correlation matrix where each cell contains the correlation coefficient (ranging from -1 to +1) between the daily returns of two specified coins over a 90-day lookback period. Values near 1 indicate coins moving together; values near 0 or negative indicate low or inverse co-movement, useful for diversification decisions.

## 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"
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "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/xynaptic-crypto-correlation-130bf9b5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.xynaptic.io](https://www.zero.xyz/host/api.xynaptic.io/llms.txt)