Edge Thirteen Graham Number MCP

This MCP server provides a tool to compute Benjamin Graham's fair-value ceiling and margin of safety for US-listed tickers. It automatically looks up EPS and book value per share from SEC filings, or accepts them as direct inputs, allowing AI agents to perform quantitative value-investing analysis.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-07Operated by Edge Thirteen

MCP endpoint (Streamable HTTP)

https://www.edgethirteen.com/api/mcp/graham-number-calculator

Vendor documentation

What its tools do

1 tool, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

compute_graham_number

1 of 1 have a description · 1 of 1 declare behavior hints · 1 of 1 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 7, 2026, 9:26 AM UTC
Passed Official MCP Registry namespace is tied to www.edgethirteen.com · Nov 7, 2026, 6:23 AM UTC
Passed Endpoint is on the registry namespace domain · Nov 7, 2026, 6:23 AM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Compute fair-value estimate for a US stock ticker
Calculate margin of safety based on Graham's formula
Verify EPS and book value data from SEC filings

Source and maintenance

Vendor evidenceRegistry 1.0.0

mcp-registry: com.edgethirteen.www/graham-number-calculator@1.0.0 Project website

Protocol and capabilities

Server: graham-number-calculator 1.0.0
MCP protocol negotiated in check: 2025-11-25
Tools: 1 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {}
}

Tools

1 advertised

compute_graham_number

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Compute Benjamin Graham's fair-value ceiling (sqrt(22.5 * EPS * book value per share)) for a US-listed ticker, and the margin of safety against its current price. Looks up EPS, book value per share, and price from SEC EDGAR + market data automatically -- just pass a ticker. You can also pass eps/bvps/price directly to compute it for a hypothetical company with no ticker.

compute_graham_number input schema

{
  "type": "object",
  "properties": {
    "eps": {
      "type": "number",
      "description": "Earnings per share, used instead of a ticker lookup"
    },
    "bvps": {
      "type": "number",
      "description": "Book value per share, used instead of a ticker lookup"
    },
    "price": {
      "type": "number",
      "description": "Current price, used to compute margin of safety"
    },
    "ticker": {
      "type": "string",
      "description": "A US-listed ticker symbol, e.g. AAPL"
    }
  }
}

compute_graham_number annotations

{
  "readOnlyHint": true,
  "openWorldHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

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: 531 ms
95th percentile latency: 531 ms

Maintenance history

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

Nov 7, 2026, 9:26 AM UTC · probe · passed · 531 ms · metadata changed · 1 tool(s)

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 edge-thirteen-graham-number-mcp https://www.edgethirteen.com/api/mcp/graham-number-calculator

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 edge-thirteen-graham-number-mcp --url https://www.edgethirteen.com/api/mcp/graham-number-calculator

Cursor

Merge this server into .cursor/mcp.json in your project, then enable edge-thirteen-graham-number-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "edge-thirteen-graham-number-mcp": {
      "url": "https://www.edgethirteen.com/api/mcp/graham-number-calculator"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "edge-thirteen-graham-number-mcp": {
      "type": "streamableHttp",
      "url": "https://www.edgethirteen.com/api/mcp/graham-number-calculator",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start edge-thirteen-graham-number-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "edge-thirteen-graham-number-mcp": {
      "type": "http",
      "url": "https://www.edgethirteen.com/api/mcp/graham-number-calculator"
    }
  }
}

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 edge-thirteen-graham-number-mcp https://www.edgethirteen.com/api/mcp/graham-number-calculator

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://www.edgethirteen.com/api/mcp/graham-number-calculator

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "edge-thirteen-graham-number-mcp": {
      "serverUrl": "https://www.edgethirteen.com/api/mcp/graham-number-calculator"
    }
  }
}

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