Koskamo

OpenCapital MCP

Provides AI agents with deep fundamentals on US public companies, including earnings, financial metrics, business segments, SEC filings, and peer comparisons. It offers read-only research tools and a single write tool for watchlist management, accessible via OAuth sign-in without requiring an API key or payment for casual use.

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

OpenCapital MCP logo, by OpenCapitalVendor evidenceStreamable HTTPOAuth sign-inEndpoint checked 2026-11-07Operated by OpenCapital
You need:OAuth sign-in through Google or email OTP
MCP endpoint (Streamable HTTP)
https://api.opencapital.sh/mcp
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to opencapital.sh ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Screen stocks and metrics with shareable URL state
  • Search and read reconstructed SEC filings (10-K, 10-Q, 8-K)
  • Generate multi-company chart comparisons with image export
  • Manage watchlists and retrieve detailed metric time series

Source and maintenance

Vendor evidenceRegistry 1.1.0
mcp-registry: sh.opencapital/mcp@1.1.0Source repositoryProject website
Maintenance checked

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
434 ms
95th percentile latency
434 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 434 ms · metadata changed · refuses unauthenticated initialize (HTTP 401)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http opencapital-mcp https://api.opencapital.sh/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add opencapital-mcp --url https://api.opencapital.sh/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable opencapital-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "opencapital-mcp": {
      "url": "https://api.opencapital.sh/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "opencapital-mcp": {
      "type": "streamableHttp",
      "url": "https://api.opencapital.sh/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start opencapital-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "opencapital-mcp": {
      "type": "http",
      "url": "https://api.opencapital.sh/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http opencapital-mcp https://api.opencapital.sh/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://api.opencapital.sh/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "opencapital-mcp": {
      "serverUrl": "https://api.opencapital.sh/mcp"
    }
  }
}

Let your agent find its tools

Find servers like OpenCapital MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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Do you run OpenCapital MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

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