# finance.edgar.xbrl_concept

Complete history of any XBRL financial concept (Revenues, NetIncomeLoss, Assets, EPS) for a company across all SEC filings. Returns up to 20 most recent values with period dates, form type, fiscal year. Free alternative to Bloomberg for historical financials.

Agent View of the PolicyLayer registry record for `finance.edgar.xbrl_concept`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/finance.edgar.xbrl-concept

## Facts

- Tool: `finance.edgar.xbrl_concept`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3 (2 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `cik` | string | yes | SEC CIK number (e.g. "320193" for Apple, "789019" for Microsoft) |
| `tag` | string | yes | XBRL concept tag (e.g. Revenues, NetIncomeLoss, Assets, EarningsPerShareBasic) |
| `taxonomy` | string | no | XBRL taxonomy (default: us-gaap). Other: ifrs-full, dei, srt |

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": "finance.edgar.xbrl_concept",
    "arguments": {
      "cik": "<cik>",
      "tag": "<tag>"
    }
  }
}
```

## Why finance.edgar.xbrl_concept is rated Low

Queries and returns historical SEC filing data without modification or execution of external operations.

From the tool's own definition: "retrieves historical financial concept data, returns values with dates, free alternative to Bloomberg"

## Use case

AI agents call finance.edgar.xbrl_concept to retrieve information from Apibase 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 Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "finance.edgar.xbrl_concept": {}
  }
}
```

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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=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase