List signal types

The signal catalog: each type, which modes it has, what a row costs, and the parameters of its signal object. Read this before you build a search. event_posts is the old name of events and is answered 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.

Response

• object string · required — Always list. One of: list.
• data object[] · required — One signal_type per type.
• data[].type string · required — The type key.
• data[].modes string[] · required — raw, screened, or both.
• data[].default_mode string · required — The mode used when a search leaves mode out.
• data[].cost object · required — Credits per delivered row. raw is { row_key, credits_per_row } or null. screened is { exact_lead, just_outside_lead } or null.
• data[].parameters object · required — JSON Schema of the signal object for this type.
• data[].limits string[] · required — What this signal cannot see.

Credits

Free. Costs in data[].cost are what a later search charges per delivered row.

Errors

• 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.
• 404 not_found — The endpoint does not exist.
• 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

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

JavaScript

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

Python

import json
import os
import urllib.request

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

Example response

{
  "object": "list",
  "data": [
    {
      "type": "funding_raised",
      "object": "signal_type",
      "title": "Leads that raised funding",
      "modes": [
        "raw",
        "screened"
      ],
      "default_mode": "raw",
      "returns": "company",
      "cost": {
        "raw": {
          "row_key": "funding_company",
          "credits_per_row": 1
        },
        "screened": {
          "exact_lead": 20,
          "just_outside_lead": 5
        }
      }
    }
  ]
}