---
title: "tool si.work.search_fit"
description: "Searches for product-market fit from one end: an offering looking for its markets, or a concept looking for a market: The call returns the search as work, then the frame that holds what it settled."
section: reference
address: /reference/tools/si-work-search_fit
contract: 0476e35e6e275db5
---

# tool si.work.search_fit

Searches for product-market fit from one end: an offering looking for its markets, or a concept looking for a market: The call returns the search as work, then the frame that holds what it settled.

[figure: Over MCP, si.work.search_fit takes FitSearchInput and returns a card whose body is FitSearch.]

The call returns the search as work, then the frame that holds what it settled. The call needs the work grant at the brand rung.



| | |
|---|---|
| input | [FitSearchInput](/concepts/fitsearchinput) |
| result | a card whose body is [FitSearch](/concepts/fitsearch) |
| read-only | no |
| destructive | no |
| card address | `ui://scale-intelligence/cards/FitSearch` |
| HTTP route | [`/v1/work/search_fit`](/reference/work/search_fit) |





| field | type | required | note |
|---|---|---|---|
| `brand` | `id` | yes |  |
| `from_end` | `one of an offering \| a concept` | yes |  |
| `offerings` | `[id]` | yes |  |
| `concept` | `text` | no |  |
| `candidate_verticals` | `[id]` | yes |  |