---
title: "tool si.act.make_market_twin"
description: "Makes one market twin from a vertical, a segment, a brand, a template and the way of going to market it serves: The answer gives the twin, ready or not ready with the stock the record cannot read named."
section: reference
address: /reference/tools/si-act-make_market_twin
contract: 0476e35e6e275db5
---

# tool si.act.make_market_twin

Makes one market twin from a vertical, a segment, a brand, a template and the way of going to market it serves: The answer gives the twin, ready or not ready with the stock the record cannot read named.

[figure: Over MCP, si.act.make_market_twin takes MakeMarketTwinInput and returns a card whose body is MarketTwin.]

The answer gives the twin, ready or not ready with the stock the record cannot read named. The call needs the act grant at the brand rung.



| | |
|---|---|
| input | [MakeMarketTwinInput](/concepts/makemarkettwininput) |
| result | a card whose body is [MarketTwin](/concepts/markettwin) |
| read-only | no |
| destructive | yes |
| card address | `ui://scale-intelligence/cards/MarketTwin` |
| HTTP route | [`/v1/act/make_market_twin`](/reference/act/make_market_twin) |





| field | type | required | note |
|---|---|---|---|
| `vertical` | `id` | yes |  |
| `segment` | `id` | no |  |
| `brand` | `id` | yes |  |
| `template` | [SystemsModelTemplate](/concepts/systemsmodeltemplate) | yes |  |
| `way` | [WayOfGoingToMarket](/concepts/wayofgoingtomarket) | no |  |
| `as_of` | `time` | no | today when absent |