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Give your agent a market-entry analyst: threefold over MCP

· threefold · 2 min read

Suppose you have a health and fitness app doing well in Germany and you are wondering about Japan. You could open both App Stores, scroll the charts, translate the listings and keep notes. Or you could ask your agent, and let it do the research with tools built for the job.

threefold provides four tools over MCP (docs/agent-tools.md): app, market, check, and workspace. Each tool joins Brand (storefronts), Paid (ad libraries) and Organic (social posts) in a single call, returning a concise markdown digest with citations and links.

This post follows one question through threefold's MCP server: how the agent calls the tool and what comes back.

Connect

threefold is a remote MCP server at https://api.threefold.eco/mcp. In Claude Code:

claude mcp add --transport http --scope user threefold https://api.threefold.eco/mcp

The first call triggers a browser sign-in. To try it with no account, use https://api.threefold.eco/mcp?keyless=1 instead: library reads are free up to a daily cap. Other clients are on the connect page.

Then ask: "How do the top health and fitness apps in Germany compare with Japan?"

Calling market

Instead of stitching together half a dozen tool calls, the agent answers the question with one call to market:

market({
  "market": "jp",
  "genre": "health-fitness",
  "vs": "de"
})

market takes the target market (jp), the genre (health-fitness), and the home market to compare against (vs: "de").

What comes back

Every answer arrives as a markdown digest under a hard context budget (~4,000 tokens), designed for the model to reason over directly, accompanied by up to 6 low-resolution previews and direct citation links:

### Overview: Health & Fitness in Japan (vs Germany)

In Japan, top health and fitness apps show heavy localization: 9 of the top 10 feature Japanese titles and adapted screenshot layouts. Only 1 app charts in both markets: Strava (#4 in DE, #7 in JP), using a fully translated Japanese title and local imagery.

Top local winners in Japan:
- **リナイト: 起床、睡眠、アラーム、瞑想** (#1 JP): Sleep, alarm and meditation app. Native Japanese copy, localized screenshots with pastel typography.
- **FiNC** (#2 JP): Domestic AI diet and fitness coach with local creator endorsements.

Key market differences vs Germany:
- **Monetization**: Japanese subscribers represent higher-value payers; US or EU subscription tiers should not be ported without adjustment.
- **Language**: Localized screenshots and keywords in Japanese are required; English listings do not chart in the top 20.
- **Channels**: Organic discussions concentrate heavily on LINE and X rather than Instagram.

**Visual evidence:** https://threefold.eco/compare?from=de&to=jp&niche=health-fitness

**Go deeper:**
- Call `app` with `app: "426826309"` (Strava) and `markets: ["de", "jp"]` to inspect localized copy and screenshots side-by-side.
- Call `market` with `focus: "pricing"` to examine the local price point distribution.

Evidence and criteria

threefold operates on a core principle: threefold returns evidence and criteria; the agent grades the user's material and cites the links.

Drilling down

When the agent wants to inspect an app or validate local readiness, the other three tools complete the workflow:

Try it

Add the server and ask about a market you are considering. Start with the connect page, and see the MCP docs for details on sign-in and scopes.

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