---
title: "tool si.act.sign_up"
description: "the company's name, and its domain where known, from a signed-in person who belongs to no tenant: the tenant, made on the trial plan with the person as its first member and owner, in one transaction with its events."
section: reference
address: /reference/tools/si-act-sign_up
contract: 0476e35e6e275db5
---

# tool si.act.sign_up

the company's name, and its domain where known, from a signed-in person who belongs to no tenant: the tenant, made on the trial plan with the person as its first member and owner, in one transaction with its events.

[figure: Over MCP, si.act.sign_up takes SignUpInput and returns a card whose body is Tenant.]

the tenant, made on the trial plan with the person as its first member and owner, in one transaction with its events. The call needs the act grant at the user rung.



| | |
|---|---|
| input | [SignUpInput](/concepts/signupinput) |
| result | a card whose body is [Tenant](/concepts/tenant) |
| read-only | no |
| destructive | yes |
| card address | `ui://scale-intelligence/cards/Tenant` |
| HTTP route | [`/v1/act/sign_up`](/reference/act/sign_up) |





| field | type | required | note |
|---|---|---|---|
| `company` | `text` | yes | the company's name as the person states it |
| `domain` | `text` | no | the company's website, which the map from a domain reads next |