UK company data: search, officers, owners, shareholders, filed accounts, new companies, KYB checks.
Connect Remote server
claude mcp add --transport http mcp https://api.companystack.co.uk/mcp --header "X-Api-Key: <X_API_KEY>"
{
"mcpServers": {
"mcp": {
"url": "https://api.companystack.co.uk/mcp",
"headers": {
"X-Api-Key": "<X_API_KEY>"
}
}
}
}
{
"servers": {
"mcp": {
"type": "http",
"url": "https://api.companystack.co.uk/mcp",
"headers": {
"X-Api-Key": "<X_API_KEY>"
}
}
}
}
Settings > Connectors > Add custom connector
URL: https://api.companystack.co.uk/mcp
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server asks for a key before it lists its tools. Connect it with your own key to see them.
Headers
| Name | Description |
|---|---|
X-Api-KeyOptional, secret | Optional: your CompanyStack API key (starts with cs_). Leave it out to sign in with CompanyStack (OAuth) instead. Create an account free at https://companystack.co.uk/signup?product=api |
Details
| Endpoint | https://api.companystack.co.uk/mcp (Streamable HTTP) |
| First published | 12 Oct 2026 |
| Last updated | 12 Oct 2026 |
| Registry name | uk.co.companystack/mcp |
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