# get_historical_prices

A read tool on the REI Crypto MCP Server MCP server.

Agent View of the PolicyLayer registry record for `get_historical_prices`. HTML page: https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-historical-prices

## Facts

- Tool: `get_historical_prices`
- Server: REI Crypto MCP Server (`0xreisearch/crypto-mcp-beta`) — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta.md
- Homepage: https://github.com/0xReisearch/crypto-mcp-beta
- Risk category: Read (Low risk)
- Registry record: grade B, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why get_historical_prices is rated Low

This tool retrieves historical cryptocurrency price data without modifying, deleting, or executing any operations. It has no financial transaction capability and no side effects. It is a standard data retrieval function typical of crypto data APIs. Severity is low due to minimal blast radius—misuse would only result in querying historical data without any destructive or financial impact.

From the tool's own definition: "Tool name 'get_historical_prices' indicates a retrieval operation. The server description states it provides 'API access to DefiLlama Pro, CoinGecko Pro, and Arkham Intelligence for crypto data retrieval.' The sibling tools (get_balances_address,…"

## Use case

AI agents call get_historical_prices to retrieve information from REI Crypto MCP Server 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 REI Crypto MCP Server:

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

## Other tools on REI Crypto MCP Server (116)

- `date_to_timestamp` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/date-to-timestamp.md
- `get_active_users` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-active-users.md
- `get_api_important_entities` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-api-important-entities.md
- `get_balances_address` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-balances-address.md
- `get_balances_entity` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-balances-entity.md
- `get_batch_historical_prices` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-batch-historical-prices.md
- `get_bridge_day_stats` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-bridge-day-stats.md
- `get_bridge_details` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-bridge-details.md
- `get_bridge_transactions` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-bridge-transactions.md
- `get_bridge_volume` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-bridge-volume.md
- `get_bridges` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-bridges.md
- `get_categories` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-categories.md
- `get_chain_assets` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-chain-assets.md
- `get_chains` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-chains.md
- `get_closest_block` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-closest-block.md
- `get_coin_by_contract` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-coin-by-contract.md
- `get_coin_by_id` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-coin-by-id.md
- `get_coin_markets` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-coin-markets.md
- `get_coin_ohlc_range` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-coin-ohlc-range.md
- `get_counterparties_address` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-counterparties-address.md
- `get_counterparties_entity` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-counterparties-entity.md
- `get_current_prices` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-current-prices.md
- `get_current_time` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-current-time.md
- `get_derivatives_overview` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-derivatives-overview.md
- `get_derivatives_summary` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-derivatives-summary.md
- `get_dex_overview` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-dex-overview.md
- `get_dex_overview_by_chain` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-dex-overview-by-chain.md
- `get_dex_summary` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-dex-summary.md
- `get_emission_data` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-emission-data.md
- `get_emissions` — Read — https://policylayer.com/tools/0xreisearch-crypto-mcp-beta/get-emissions.md
- …and 86 more: https://policylayer.com/tools/0xreisearch-crypto-mcp-beta.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=0xreisearch-crypto-mcp-beta · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xreisearch-crypto-mcp-beta