# crypto_fear_greed

Crypto Fear & Greed Index (0—100 sentiment) + 7-day history via Alternative.me for risk-on/off signals and entry/exit ga Cost: $0.005–$0.05 USDC on Base per call.

Agent View of the PolicyLayer registry record for `crypto_fear_greed`. HTML page: https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-fear-greed

## Facts

- Tool: `crypto_fear_greed`
- Server: Omnicall — Agent Tools Gateway (`https://omnicall.gocreativeai.com/mcp`) — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools.md
- Homepage: https://github.com/https://omnicall.gocreativeai.com/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `arg` | string | yes |  |

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": "crypto_fear_greed",
    "arguments": {
      "arg": "<arg>"
    }
  }
}
```

## Why crypto_fear_greed is rated Low

This is a pure data retrieval tool that queries an external sentiment index (Alternative.me) and returns historical trend data. It produces informational output only—no side effects, no code execution, no data modification, and no financial transaction (the USDC cost is a metering fee for API access, not a financial operation performed by the tool itself).

From the tool's own definition: "Tool retrieves 'Crypto Fear & Greed Index (0—100 sentiment) + 7-day history via Alternative.me for risk-on/off signals'. The language 'retrieves', 'history', and 'signals' indicates data querying with no modification, execution, or financial commitment."

## Use case

AI agents call crypto_fear_greed to retrieve information from Omnicall — Agent Tools Gateway 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 Omnicall — Agent Tools Gateway:

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

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- `crypto_gas` — Read — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-gas.md
- `crypto_global` — Read — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-global.md
- `crypto_history` — Read — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-history.md
- `crypto_market` — Read — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-market.md
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- `crypto_trending` — Read — https://policylayer.com/tools/com-gocreativeai-omnicall-agent-tools/crypto-trending.md
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## 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`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-gocreativeai-omnicall-agent-tools · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-gocreativeai-omnicall-agent-tools