Tools: Custom fields
list_fields
The custom fields defined for companies, people and deals.
| Group | Custom fields |
| Scope | crm:read |
| Who can call it | Signed-in people only. Agents don't see this tool over MCP, and calling it with an API key returns forbidden. People use it in the Tandem app. |
| Kind | Read-only (MCP annotation readOnlyHint: true). |
| Retries | Safe to repeat. |
| Widget | Text only. |
Parameters
| Parameter | Type | Required | Notes |
|---|---|---|---|
entity_type | company \ | person \ | deal |
Call it over MCP
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "list_fields",
"arguments": {}
}
}
Send it to https://api.tandemcrm.app/mcp (streamable HTTP). Most people never write this by hand: their agent picks the tool from its description.
Call it over REST
curl -X POST https://api.tandemcrm.app/v1/ops/list_fields \
-H "Authorization: Bearer $TANDEM_API_KEY" \
-H "Content-Type: application/json" \
-d '{}'
Input schema
The JSON Schema the MCP server advertises for this tool:
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"entity_type": {
"type": "string",
"enum": [
"company",
"person",
"deal"
]
}
}
}