# rotate_api_key

Rotate your Fathom API key. Generates a new key, deactivates the old one, and returns the new key. The user must update their MCP config with the new key. Max 3 rotations per day. Requires Starter tier or above.

Agent View of the PolicyLayer registry record for `rotate_api_key`. HTML page: https://policylayer.com/tools/0xhashy-fathom-fyi/rotate-api-key

## Facts

- Tool: `rotate_api_key`
- Server: Fathom Fyi (`0xhashy/fathom-fyi`) — https://policylayer.com/tools/0xhashy-fathom-fyi.md
- Homepage: https://github.com/0xHashy/fathom-fyi
- Risk category: Write (Medium risk)
- Registry record: grade C, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "rotate_api_key",
    "arguments": {}
  }
}
```

## Why rotate_api_key is rated Medium

This tool creates a new API key (Write action) and deactivates the old one (reversible modification of access credentials). While it modifies security credentials, it does not expose financial data, execute trades, or permanently destroy information.

From the tool's own definition: "Rotate your Fathom API key. Generates a new key, deactivates the old one, and returns the new key."

## Use case

AI agents use rotate_api_key to create or update resources in Fathom Fyi, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fathom Fyi environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Fathom Fyi:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "rotate_api_key": {
      "limits": [
        {
          "counter": "rotate_api_key_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Fathom Fyi (31)

- `evaluate_strategy` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/evaluate-strategy.md
- `get_account_status` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-account-status.md
- `get_alerts` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-alerts.md
- `get_alternative_signals` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-alternative-signals.md
- `get_asset_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-asset-context.md
- `get_asset_momentum` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-asset-momentum.md
- `get_chain_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-chain-context.md
- `get_correlation_matrix` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-correlation-matrix.md
- `get_crowd_intelligence` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-crowd-intelligence.md
- `get_defi_health` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-defi-health.md
- `get_derivatives_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-derivatives-context.md
- `get_event_catalyst_timeline` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-event-catalyst-timeline.md
- `get_historical_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-historical-context.md
- `get_macro_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-macro-context.md
- `get_market_regime` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-market-regime.md
- `get_narrative_pulse` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-narrative-pulse.md
- `get_onchain_pulse` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-onchain-pulse.md
- `get_portfolio_analysis` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-portfolio-analysis.md
- `get_question_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-question-context.md
- `get_reality_check` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-reality-check.md
- `get_sentiment_state` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-sentiment-state.md
- `get_signal_history` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-signal-history.md
- `get_stablecoin_flows` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-stablecoin-flows.md
- `get_temporal_context` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-temporal-context.md
- `get_watchlist_report` — Read — https://policylayer.com/tools/0xhashy-fathom-fyi/get-watchlist-report.md
- `manage_webhooks` — Write — https://policylayer.com/tools/0xhashy-fathom-fyi/manage-webhooks.md
- `set_alert` — Write — https://policylayer.com/tools/0xhashy-fathom-fyi/set-alert.md
- `set_custom_strategy` — Write — https://policylayer.com/tools/0xhashy-fathom-fyi/set-custom-strategy.md
- `set_portfolio_context` — Write — https://policylayer.com/tools/0xhashy-fathom-fyi/set-portfolio-context.md
- `set_signal_preferences` — Write — https://policylayer.com/tools/0xhashy-fathom-fyi/set-signal-preferences.md
- …and 1 more: https://policylayer.com/tools/0xhashy-fathom-fyi.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`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=0xhashy-fathom-fyi · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xhashy-fathom-fyi