Legal

Data source: PRH (Patentti- ja rekisterihallitus / Finnish Patent and Registration Office)

MCP MCP Protocol

Endpoint https://context.gnist.ai/mcp/prh/

nobloat — strip report_feedback tool URL-based auth (for clients without header support)

claude_desktop_config.json

{
  "mcpServers": {
    "gnist-prh": {
      "url": "https://context.gnist.ai/mcp/prh/",
      "headers": {
        "Gnist-API-Key": "YOUR_API_KEY"
      }
    }
  }
}

Shell

curl -X POST "https://context.gnist.ai/mcp/prh/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "lookup_prh_company", "arguments": {"business_id": "example"}}}'

API REST API

API Root https://context.gnist.ai/rest/prh/

4 endpoints available:

GET /rest/prh/lookup_prh_company
GET /rest/prh/search_prh_companies
GET /rest/prh/get_prh_financial_periods
GET /rest/prh/report_feedback

Shell

curl "https://context.gnist.ai/rest/prh/lookup_prh_company?business_id=example" \
  -H "Gnist-API-Key: YOUR_API_KEY"

Python

import httpx

resp = httpx.get(
    "https://context.gnist.ai/rest/prh/lookup_prh_company",
    headers={"Gnist-API-Key": "YOUR_API_KEY"},
    params={
        "business_id": "example"
},
)
print(resp.json())

OpenAPI Spec · Full API Docs

CLI Command Line

Command gc prh

CLI documentation will be available when the GnistAI SDK is published.

Install

pip install gnistai

Available Tools (4)

lookup_prh_company

Look up a Finnish company by its business ID (Y-tunnus).

Parameter	Type	Required	Description
`business_id`	`string`	required	Finnish business ID (Y-tunnus) — format "1234567-8" (e.g. "0112038-9" for Nokia).

search_prh_companies

Search the Finnish Trade Register by name, location, company form, or industry.

Parameter	Type	Required	Description
`name`	`any`	optional	Company name or partial name to search for.
`location`	`any`	optional	Town or city (e.g. 'Helsinki', 'Espoo', 'Tampere').
`company_form`	`any`	optional	Company form code: 'OY' (private limited), 'OYJ' (public limited), 'KY' (limited partnership), 'OK' (cooperative), 'AY' (general partnership).
`business_line`	`any`	optional	TOL 2008 industry code or text (e.g. '62010' for software development).
`max_results`	`integer`	optional	Maximum number of results to return (1-50, default 10). (default: 10)