# get_overview_fees__by_chain

List all protocols along with summaries of their fees and revenue and dataType history data by chain

Agent View of the PolicyLayer registry record for `get_overview_fees__by_chain`. HTML page: https://policylayer.com/tools/defillama/get-overview-fees--by-chain

## Facts

- Tool: `get_overview_fees__by_chain`
- Server: Defillama (`@nic0xflamel/defillama-mcp-server`) — https://policylayer.com/tools/defillama.md
- Install: `npx -y @nic0xflamel/defillama-mcp-server`
- Homepage: git+https://github.com/nic0flamel/notion-automation.git
- Risk category: Read (Low risk)
- Registry record: grade B, identity unverified
- Server rate-limited: no
- Parameters: 4 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `chain` | string | yes | chain name, list of all supported chains can be found under allChains attribute in /overview/fees response |
| `dataType` | string | no | Desired data type, dailyFees by default. |
| `excludeTotalDataChart` | boolean | no | true to exclude aggregated chart from response |
| `excludeTotalDataChartBreakdown` | boolean | no | true to exclude broken down chart from response |

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_overview_fees__by_chain",
    "arguments": {
      "chain": "<chain>"
    }
  }
}
```

## Why get_overview_fees__by_chain is rated Low

This tool retrieves and queries fee and revenue summary data for protocols organized by blockchain chain. It performs a read-only operation with no side effects, reversible modifications, code execution, deletions, or financial transactions. The blast radius of misuse is minimal—an AI agent could only consume bandwidth or retrieve public DeFi data, neither of which poses significant harm.

From the tool's own definition: "Tool name contains 'get_overview' and description states 'List all protocols' — both indicate data retrieval. No verbs indicating modification (create, update, delete, execute) appear in the name or description."

## Use case

AI agents call get_overview_fees__by_chain to retrieve information from Defillama 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 Defillama:

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

## Other tools on Defillama (13)

- `get_chart__by_pool` — Read — https://policylayer.com/tools/defillama/get-chart--by-pool.md
- `get_overview_dexs` — Read — https://policylayer.com/tools/defillama/get-overview-dexs.md
- `get_overview_dexs__by_chain` — Read — https://policylayer.com/tools/defillama/get-overview-dexs--by-chain.md
- `get_overview_fees` — Read — https://policylayer.com/tools/defillama/get-overview-fees.md
- `get_pools` — Read — https://policylayer.com/tools/defillama/get-pools.md
- `get_protocols` — Read — https://policylayer.com/tools/defillama/get-protocols.md
- `get_stablecoincharts_all` — Read — https://policylayer.com/tools/defillama/get-stablecoincharts-all.md
- `get_summary_dexs__by_protocol` — Read — https://policylayer.com/tools/defillama/get-summary-dexs--by-protocol.md
- `get_summary_fees__by_protocol` — Read — https://policylayer.com/tools/defillama/get-summary-fees--by-protocol.md
- `get_tvl__by_protocol` — Read — https://policylayer.com/tools/defillama/get-tvl--by-protocol.md
- `get_v2_chains` — Read — https://policylayer.com/tools/defillama/get-v2-chains.md
- `get_v2_historicalChainTvl` — Read — https://policylayer.com/tools/defillama/get-v2-historicalchaintvl.md
- `get_v2_historicalChainTvl__by_chain` — Read — https://policylayer.com/tools/defillama/get-v2-historicalchaintvl--by-chain.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=defillama · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/defillama