CompanyStack · Authentication Profile

CompanyStack Authentication

Authentication

CompanyStack declares 2 security scheme(s) across its OpenAPI definitions.

CompanyCompany DataCompanies HouseUnited KingdomKYBBusiness VerificationMCP

Methods: Schemes: 2 OAuth flows: API key in:

Security Schemes

X-Api-Key apiKey

· in: header ()

CompanyStack sign-in oauth2

Source

Authentication Profile

generated: '2026-11-04'
method: searched
source: https://registry.modelcontextprotocol.io/v0/servers?search=companystack
docs: https://companystack.co.uk/developers/mcp
note: companystack.co.uk refused TCP connections on 2026-11-04 (ECONNREFUSED), so the docs page could not be read; the scheme below is quoted from the provider's own official MCP Registry entry uk.co.companystack/mcp v0.1.1 (isLatest).
schemes:
- name: X-Api-Key
  type: apiKey
  in: header
  key_prefix: cs_
  applies_to: https://api.companystack.co.uk/mcp
  required: false
  evidence: "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"
- name: CompanyStack sign-in
  type: oauth2
  applies_to: https://api.companystack.co.uk/mcp
  evidence: "Leave it out to sign in with CompanyStack (OAuth) instead."
  note: Flows, endpoints and scopes are not published in the registry entry; v0.1.0 described the 401 challenge as the signal that sign-in is offered.

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