# get_rolling_corr

Rolling Pearson correlation between two coins over configurable window (7-90d). $0.10

Agent View of the PolicyLayer registry record for `get_rolling_corr`. HTML page: https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-rolling-corr

## Facts

- Tool: `get_rolling_corr`
- Server: Crypto Intelligence (`https://api.carbon-cashmere.de/mcp/sse`) — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence.md
- Homepage: https://github.com/Nedeljko87/Carbon-Cashmere
- Risk category: Read (Low risk)
- Registry record: grade D, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `pair` | string | yes | Pair format BASE-QUOTE (e.g. BTC-ETH) |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_rolling_corr",
    "arguments": {
      "pair": "<pair>"
    }
  }
}
```

## Why get_rolling_corr is rated Low

The tool retrieves and calculates correlation metrics from historical price data. It has no side effects—it neither creates, modifies, deletes data, nor executes arbitrary code or financial transactions (the $0.10 is a query cost, not a financial operation). The configurable window is a safe input parameter for historical analysis. This is clearly a Read operation (analyze/compute).

From the tool's own definition: "Tool computes and returns 'rolling Pearson correlation between two coins over configurable window'. This is a statistical calculation/query operation with no data modification, deletion, or external state changes."

## Use case

AI agents call get_rolling_corr to retrieve information from Crypto Intelligence without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Crypto Intelligence:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_rolling_corr": {}
  }
}
```

## Other tools on Crypto Intelligence (103)

- `run_backtest` — Execute — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/run-backtest.md
- `run_strategy_test` — Execute — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/run-strategy-test.md
- `ask_assistant` — Financial — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/ask-assistant.md
- `get_decisions` — Financial — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-decisions.md
- `get_analytics_bundle` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-analytics-bundle.md
- `get_anomalies` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-anomalies.md
- `get_anomaly_coin` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-anomaly-coin.md
- `get_anomaly_history` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-anomaly-history.md
- `get_beta_to_btc` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-beta-to-btc.md
- `get_bittensor` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-bittensor.md
- `get_bittensor_epoch` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-bittensor-epoch.md
- `get_bittensor_tao` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-bittensor-tao.md
- `get_bittensor_validators` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-bittensor-validators.md
- `get_blocks` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-blocks.md
- `get_btc_fee_market` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-btc-fee-market.md
- `get_btc_onchain` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-btc-onchain.md
- `get_btc_rbf_pulse` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-btc-rbf-pulse.md
- `get_btc_ultimate` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-btc-ultimate.md
- `get_btc_whales` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-btc-whales.md
- `get_chain_activity` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-chain-activity.md
- `get_chart_vision` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-chart-vision.md
- `get_coin_days` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-coin-days.md
- `get_coin_research` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-coin-research.md
- `get_cointegration` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-cointegration.md
- `get_consensus` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-consensus.md
- `get_conviction` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-conviction.md
- `get_correlations` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-correlations.md
- `get_crypto_news` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-crypto-news.md
- `get_daily_report` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-daily-report.md
- `get_decision_pack` — Read — https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence/get-decision-pack.md
- …and 73 more: https://policylayer.com/tools/de-carbon-cashmere-api-crypto-intelligence.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=de-carbon-cashmere-api-crypto-intelligence · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/de-carbon-cashmere-api-crypto-intelligence