# Market Capitalization

> Returns the current market capitalization for an equity.

`GET https://api.bavest.co/v2/equities/market-cap`

Group: Equities. Route id: `v2_equities_market_cap`. Included in: Startup, Pro, Growth.

## Description

Returns the current market capitalization for an equity.

The currency is not fixed per security: since 1 Sep 2026 new values are
in the filer's reporting currency where one is on file, otherwise EUR;
not the listing currency. Read `metricCurrency` rather than assuming
EUR, USD or the listing currency. It is the same series
served as `market_cap` by `/v2/equities/metrics`.

## Authentication

Send your API key in the `x-api-key` header on every request. No key yet? Sign up at https://dashboard.bavest.co/sign-up (free trial). The examples read the key from the `BAVEST_API_KEY` environment variable.

## Parameters

| Name | In | Type | Required | Description |
|---|---|---|---|---|
| `symbol` | query | string | one of symbol, isin | Stock ticker symbol (e.g., `AAPL`, `MSFT`, `GOOGL`). Provide exactly one of symbol or isin. Example `AAPL`. |
| `isin` | query | string | one of symbol, isin | ISIN code (e.g., `US0378331005`). Provide exactly one of symbol or isin. Clear the symbol example before using an ISIN. |

Required: one of `symbol`, `isin`.

## Response

200 Successful response (`application/json`).

| Field | Type | Always present | Description |
|---|---|---|---|
| `data` | MarketCapSnapshot | no | Current market capitalization. |
| `data.metricCurrency` | string | yes | Currency of the market capitalization value (ISO 4217) Example: `USD`. |
| `data.metricDate` | string | no | Observation date. Example: `2026-03-24T00:00:00`. |
| `data.metricValue` | number (double) | yes | Market capitalization value. Example: `3690170000000`. |
| `meta` | ResponseMeta | no | Response envelope metadata. Always present on a 200: `time` is set by `core/response.py` on every successful response. Errors carry the same block, built by the same code, so a client parses one meta shape whether the call succeeded or failed. |
| `meta.time` | integer | no | Server-side processing time in milliseconds. Example: `17`. |
| `meta.parameters` | object | no | Echo of the request parameters the endpoint resolved. |

## Example request

```bash
curl 'https://api.bavest.co/v2/equities/market-cap?symbol=AAPL' \
  -H "x-api-key: $BAVEST_API_KEY"
```

## Example response

```json
{
  "data": {
    "metricValue": 4884824000000,
    "metricCurrency": "USD",
    "metricDate": "2026-10-01T00:00:00"
  },
  "meta": {
    "parameters": {
      "symbol": "AAPL"
    },
    "time": 16
  }
}
```

## Errors

| Status | Meaning |
|---|---|
| 400 | Invalid request parameters. Returned when required query parameters are missing, have invalid types, or violate constraints (e.g., providing both symbol and isin when they are mutually exclusive). |
| 401 | Missing or invalid API key. |
| 404 | Resource not found. |
| 429 | Rate limit exceeded. Retry after the `Retry-After` header interval. |
| 500 | An unexpected error occurred on the server. If the issue persists, contact support with the X-Request-Id header value. |
| 502 | Upstream data provider returned an error or is temporarily unavailable. Retry after a short delay. |
| 504 | The request timed out waiting for a response from the upstream data provider. This may occur for complex queries or during peak load. |
| default | An unexpected error occurred on the server. If the issue persists, contact support with the X-Request-Id header value. |

- `403` from the gateway: the API key is invalid or switched off.
- `429` with message `Limit Exceeded`: the monthly quota of the key is used up. With `Too Many Requests`: the key is throttled, or this route is not in the key's plan. Wait for `Retry-After` when it is sent.

## Links

- HTML page: https://dashboard.bavest.co/docs/v2_equities_market_cap
- OpenAPI: https://dashboard.bavest.co/openapi.json (YAML: https://dashboard.bavest.co/openapi.yaml)
- Authentication: https://dashboard.bavest.co/docs/authentication.md
- MCP server for AI agents: https://dashboard.bavest.co/docs/mcp.md
- All routes: https://dashboard.bavest.co/llms.txt