# get_historical_liquidity

GET /api/historicalLiquidity/{token}

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

## Facts

- Tool: `get_historical_liquidity`
- 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_liquidity",
    "arguments": {}
  }
}
```

## Why get_historical_liquidity is rated Low

This tool retrieves historical liquidity data for a specified token from the crypto data APIs (DefiLlama Pro, CoinGecko Pro, or Arkham Intelligence). It is a read-only query operation with no side effects, creation, modification, or deletion of data. The blast radius of misuse is minimal—an attacker could only retrieve historical liquidity information, which is typically public blockchain data.

From the tool's own definition: "Tool name is 'get_historical_liquidity' with GET method to retrieve '/api/historicalLiquidity/{token}'. The 'get_' prefix and GET HTTP method indicate data retrieval. No parameters suggest data modification, deletion, or execution of arbitrary operations."

## Use case

AI agents call get_historical_liquidity 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_liquidity": {}
  }
}
```

## 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