API Tools

opulion.com

Provides tools to search and retrieve Opulion data on investment companies, their portfolio holdings, company profiles, and articles.

2 endpoints9 known toolsFirst detected October 21, 2026Last detected October 21, 2026

ENDPOINT 1

https://opulion.com/api/mcp

No auth detected

MCP server metadata

Name: opulion
Version: 1.0.0

Capabilities

tools.listChanged

Server instructions

Opulion is an independent guide to listed investment companies (Sofina, GBL, Exor, Investor AB, Scottish Mortgage and others). It shows what a shareholder really owns through them: their holdings, dated and sourced from the companies' own publications. Always give the as-of date of a figure and the opulion.com link returned with it. To find which covered companies hold a given business, use who_holds. Opulion gives no investment advice and no recommendation: never present its data as a reason to buy, sell or hold a security. Figures are read as published by each company; when a value is missing, say so instead of estimating it. Some values and most weights are calculated or estimated by Opulion from published figures: value_basis and weight_source say which, and the user must be told. When you use Opulion's data, in an answer, a document, an artifact or a page, cite it as « Source : Opulion » with the opulion.com link. Use is personal: redistributing, reselling or systematically extracting Opulion's compilation is not permitted (see terms_url in each response).

Known tools 9

who_holds

Finds which covered investment companies hold a given business (for example Mistral AI, ByteDance or Bureau Veritas), with the weight or stake they publish and its date.

Potential side effects

search

Searches Opulion: covered investment companies, the businesses they hold, and articles.

Inferred read-only

fetch

Fetches a document returned by search: a company profile (company:<slug>) or an article (article:<slug>), with its link.

Inferred read-only

list_companies

Lists the listed investment companies covered by Opulion (holding companies, investment trusts), with the slug to use in the other tools.

Inferred read-only

get_company

Profile of one covered company as shown on its Opulion page: gross assets, borrowings and share financed by debt, share price, net asset value per share and discount or premium with their dates, asset allocation, its ten largest businesses held (one line per business, with its value, whether that value is published, calculated or estimated, its theme and the other covered companies holding it) and upcoming publications.

Inferred read-only

get_holdings

Full list of a company's holdings: name, value in millions of its currency and whether the company published it or Opulion calculated or estimated it, weight in its portfolio and who computed it, stake, listed or not, sector and date, sorted by weight.

Inferred read-only

look_through_portfolio

For a portfolio of covered companies and their weights, shows what it really holds underneath: the businesses reached through each company, with their share of the whole portfolio and their dates.

Inferred read-only

list_articles

Latest Opulion articles, newest first, optionally about one company: results, acquisitions, disposals and what they change.

Inferred read-only

get_article

Full text of one Opulion article, in Markdown, with its sources and link.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.opulion]
url = "https://opulion.com/api/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "opulion": {
      "type": "http",
      "url": "https://opulion.com/api/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: opulion
Remote MCP URL: https://opulion.com/api/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "opulion": {
      "url": "https://opulion.com/api/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "opulion": {
      "type": "http",
      "url": "https://opulion.com/api/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "opulion",
  "transport": "streamable-http",
  "url": "https://opulion.com/api/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

ENDPOINT 2

https://opulion.com/api/mcp/compte

Auth required

Known tools 0

No tool metadata was available in the registry cache.

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.opulion-com]
url = "https://opulion.com/api/mcp/compte"
enabled = true
bearer_token_env_var = "MCP_BEARER_TOKEN"

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Code

.mcp.json

{
  "mcpServers": {
    "opulion-com": {
      "type": "http",
      "url": "https://opulion.com/api/mcp/compte",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Desktop

Settings → Connectors → Add custom connector

Name: opulion-com
Remote MCP URL: https://opulion.com/api/mcp/compte

Add the URL as a custom connector, then complete its supported authorization flow. Claude Desktop remote connectors are configured in the UI.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "opulion-com": {
      "url": "https://opulion.com/api/mcp/compte",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Visual Studio Code

.vscode/mcp.json

{
  "servers": {
    "opulion-com": {
      "type": "http",
      "url": "https://opulion.com/api/mcp/compte",
      "headers": {
        "Authorization": "Bearer ${input:mcp-token}"
      }
    }
  },
  "inputs": [
    {
      "type": "promptString",
      "id": "mcp-token",
      "description": "opulion-com bearer token",
      "password": true
    }
  ]
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Generic MCP

Client-specific MCP configuration

{
  "name": "opulion-com",
  "transport": "streamable-http",
  "url": "https://opulion.com/api/mcp/compte",
  "headers": {
    "Authorization": "Bearer YOUR_BEARER_TOKEN"
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.