# Get a signal type

One signal type from the catalog: parameters, buyer-profile filters, cost and limits. `event_posts` answers as `events`.

One signal type from the catalog: parameters, buyer-profile filters, cost and limits. `event_posts` answers as `events`.

## Authentication

Send `Authorization: Bearer gtk_…`. Create the key under **API Access → API Keys**. A missing, invalid or revoked key is **401**, including while this API is closed. A valid key while the API is closed for your organization answers **404**, the same body as an unknown path. Every response includes `FounderMCP-Api-Version` and `FounderMCP-Request-Id`.

### Path parameters

- **`signal_type`** `string` · **required** — A type from GET /signals. One of: `linkedin_engagement`, `social_listening`, `funding_raised`, `new_in_role`, `events`, `tech_adoption`.

## Response

- **`type`** `string` · **required** — The type key.
- **`modes`** `string[]` · **required** — Modes this type accepts.
- **`default_mode`** `string` · **required** — Used when a search leaves `mode` out.
- **`cost`** `object` · **required** — Credits per delivered row or lead.
- **`filterable`** `string[]` · **required** — Buyer-profile fields mode screened filters on.
- **`max_rows`** `integer | null` — Most rows one raw search returns. Null without mode raw.
- **`max_leads`** `integer | null` — Cap on exact leads in mode screened. Null without mode screened.
- **`parameters`** `object` · **required** — JSON Schema of the signal object.
- **`limits`** `string[]` · **required** — What this signal cannot see.

## Credits

Free.

## Errors

- **404** `not_found` — No such signal type, or the Signals API is not open.
- **401** `authentication_error` — The Authorization header is missing, or the key is unknown or revoked.
- **403** `permission_error` — API access is not part of your plan, or your account is suspended.
- **429** `rate_limit_error` — More than 60 requests per minute, or more than 3 at the same time, on one key. Wait for the Retry-After header.
- **500** `internal_error` — Something went wrong on our side.

## Example

### cURL

```bash
curl "https://foundermcp.dev/api/v1/signals/funding_raised" \
  -H "Authorization: Bearer $FOUNDERMCP_API_KEY"
```

### JavaScript

```javascript
const response = await fetch('https://foundermcp.dev/api/v1/signals/funding_raised', {
  method: 'GET',
  headers: {
    Authorization: `Bearer ${process.env.FOUNDERMCP_API_KEY}`
  }
});
const body = await response.json();
```

### Python

```python
import json
import os
import urllib.request

request = urllib.request.Request(
    "https://foundermcp.dev/api/v1/signals/funding_raised",
    headers={
    "Authorization": f"Bearer {os.environ['FOUNDERMCP_API_KEY']}"
    },
    method="GET",
)
with urllib.request.urlopen(request) as response:
    body = json.load(response)
```

### Example response

```json
{
  "type": "tech_adoption",
  "object": "signal_type",
  "modes": [
    "raw"
  ],
  "default_mode": "raw",
  "returns": "company",
  "cost": {
    "raw": {
      "row_key": "tech_company",
      "credits_per_row": 20
    },
    "screened": null
  },
  "max_rows": 25,
  "max_leads": null,
  "limits": [
    "A company is newly detected in job postings, not newly switched."
  ]
}
```