---
title: "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 to The answer gives the twin, ready or not ready with the stock the record cannot read named"
section: reference
address: /reference/act/make_market_twin
contract: 0476e35e6e275db5
---

# 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 to The answer gives the twin, ready or not ready with the stock the record cannot read named

[figure: The caller sends MakeMarketTwinInput to /v1/act/make_market_twin. The platform returns a card whose body is MarketTwin.]

<span class="op-method">POST</span><span class="op-path">/v1/act/make_market_twin</span>

Make the twin of a market. The call needs the brand rung under a token with the act grant, and it is served by the platform.

The route takes [MakeMarketTwinInput](/concepts/makemarkettwininput) and returns a card whose body is [MarketTwin](/concepts/markettwin).



## Request body
The request body is [MakeMarketTwinInput](/concepts/makemarkettwininput).



| 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 |



## Response
The route returns a card whose body is [MarketTwin](/concepts/markettwin). Every card ends with a foot that states the basis of each number, the scope of the call, and the time when the facts were true.

## Headers


| header | required | meaning |
|---|---|---|
| `Scale-Scope` | yes | the scope the call runs in: tenant/<id>, then /brand/<id>, then /strategy/<id> |
| `Scale-As-True-On` | no | the date the facts must have been true on; defaults to now |
| `Scale-As-Known-On` | no | the date the facts must have been known on; defaults to now |
| `Scale-Key` | no | for a change, the key made from the input; a repeat under the same key returns the unit held and writes nothing |



A caller needs the brand rung and a token with the act grant. The platform serves this route.

## Example
The example sends the smallest body that MakeMarketTwinInput allows. The build validates it against the schema of MakeMarketTwinInput.

<details class="wire"><summary>Example</summary>





```sh
curl -X POST https://api.scaleintelligence.co/v1/act/make_market_twin \
  -H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/<id>" \
  -H "content-type: application/json" \
  -d '{ "vertical": "…", "brand": "…", "template": "…" }'
```




```typescript
import { client } from "@scale/sdk";
const answer = await client.act.make_market_twin({
    "vertical": "…",
    "brand": "…",
    "template": "…"
  });
// answer.body is a MarketTwin. answer.foot holds the basis, the scope and the time.
```




```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/make_market_twin",
    headers={"Scale-Key": KEY, "Scale-Scope": "tenant/<id>"},
    json={
      "vertical": "…",
      "brand": "…",
      "template": "…"
    }).json()
```




```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/make_market_twin")
    .header("Scale-Key", key).header("Scale-Scope", "tenant/<id>")
    .json(&MakeMarketTwinInput { /* the fields of the page */ }).send().await?.json().await?;
```




</details>

## MCP tool
The MCP tool `si.act.make_market_twin` takes the same input and returns the same card. The tool changes data and needs a grant. An MCP host that renders cards draws this card from `ui://scale-intelligence/cards/MarketTwin`. The [tool's page](/reference/tools/si-act-make_market_twin) describes it.