# ChatStack (chatstack.app)

Turns a described app idea into an indicative development cost, MVP scope and a structured requirements document for coding tools.

- Atlas card: https://inite.ai/en/atlas/chatstack.app
- Site: https://chatstack.app
- For: Product owners and dev teams scoping an app idea before build, especially those using Cursor or Claude Code
- Categories: dev
- Use not measured/100 · alive 100/100

## Used for

- estimate total development cost for an app idea
- generate a structured PRD with user stories
- trim MVP scope by removing user stories

## Price

- no price printed, no free plan (read 2026-10-29 on https://chatstack.app/how-much-does-it-cost-to-build-an-app)

## For developers

- OpenAPI: https://chatstack.app/openapi.json (6 paths)
- MCP server: app.chatstack/app-cost-estimator (namespace; open on 2026-10-29, 5 tools)
- Read 2026-10-29

## MCP server, measured daily

Server: https://mcp.chatstack.app/mcp, checked every day since 2026-10-30 (3 checks).

- Answered: measuring, 3 daily checks so far
- Median first answer: 627 ms
- Sign-in: none
- Context its tool definitions take: about 2378 tokens (5 tools)
- Tool definitions: A, 97/100
- Failing "params_described": 1 of 5 tools
- Warning "destructive_denied": send_turn, send_action
- Warning "open_writes": send_turn, send_action
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-29

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Source: INITE Atlas, https://inite.ai/en/atlas/chatstack.app. JSON: https://inite.ai/api/atlas/chatstack.app. MCP: https://inite.ai/api/mcp (atlas_lookup).