# CompanyStack (companystack.co.uk)

Reads UK Companies House filings into year-by-year accounts figures, owner records, filing deadlines and alerts when a company falls behind.

- Atlas card: https://inite.ai/en/atlas/companystack.co.uk
- Site: https://companystack.co.uk
- For: People checking UK companies before trading with, lending to, or onboarding them as clients.
- Categories: finance
- Use 0/100 · alive 100/100

## Used for

- check a company's accounts and owners before trading with it
- watch companies for overdue filings and insolvency notices
- verify directors and controllers for client due diligence

## Price

- from 19 GBP/month, free plan (read 2026-10-21 on https://companystack.co.uk/pricing)

## For developers

- OpenAPI: https://companystack.co.uk/openapi.json (153 paths)
- API docs: https://companystack.co.uk/api
- MCP server: uk.co.companystack/mcp (namespace; auth on 2026-10-21)
- Status page: https://status.companystack.co.uk
- Read 2026-10-21

## MCP server, measured daily

Server: https://api.companystack.co.uk/mcp, checked every day since 2026-10-21 (6 checks).

- Answered: measuring, 6 daily checks so far
- Median first answer: 657 ms
- Sign-in: a pasted key
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: gdpr
- Read 2026-10-21

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Source: INITE Atlas, https://inite.ai/en/atlas/companystack.co.uk. JSON: https://inite.ai/api/atlas/companystack.co.uk. MCP: https://inite.ai/api/mcp (atlas_lookup).