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Codon Valuation

com.codonvaluation.mcp/codon-valuationmcp.codonvaluation.comstreamable-httpv1.0.1Scanned

Indicative US 409A and UK EMI share value estimates from cap table and financial inputs. Read-only.

3 tools: 2 change things and 1 only read.

Tools: 0 delete, 0 irreversible, 2 write, 1 read.
  • Reads private data · 1
  • Reads text others write · 0
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

Anlyon alternative

2 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

3 tools

Changes things 2Claude Code: ask
  • estimate_409a_valueGives an indicative range for the fair market value per share of a US private company's common stock, as a planning estimate before a formal 409A valuation (for example, to anticip…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Gives an indicative range for the fair market value per share of a US private company's common stock, as a planning estimate before a formal 409A valuation (for example, to anticipate an option strike price). Uses an option pricing model backsolve when there is a priced round in the last 12 months; otherwise a rolled-forward round, a sector revenue multiple, or an asset-based approach, depending on the inputs. Applies Finnerty and Chaffe marketability discounts. Inputs are numbers from the cap table and financials; no company or personal names are needed. Limitations: treats all preferred as non-participating and pari passu with 1:1 conversion, and does not model SAFEs or convertible notes. The result is not a 409A valuation.

    Annotations the server declares

    • title: Estimate 409A common stock value
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • estimate_emi_share_valueGives an indicative range for the market value per ordinary share of a UK private company, as a planning estimate before agreeing an EMI valuation with HMRC (for example, to antici…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Gives an indicative range for the market value per ordinary share of a UK private company, as a planning estimate before agreeing an EMI valuation with HMRC (for example, to anticipate an EMI option exercise price). Uses the same methods as the 409A estimate, in pounds sterling: an option pricing model backsolve for a priced round in the last 12 months, otherwise a rolled-forward round, a sector revenue multiple, or an asset-based approach. Inputs are numbers from the shareholder register and accounts; no company or personal names are needed. Limitations: treats all preference shares as non-participating and pari passu, and does not model convertible instruments. The result is not an HMRC-agreed valuation.

    Annotations the server declares

    • title: Estimate UK EMI ordinary share value
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 1Show 1 read-only tool
  • get_formal_valuation_infoLists the documents and typical steps for a formal US 409A valuation or UK EMI valuation, with contact details for Codon Valuation Advisors, the firm that provides this connector.Reads private dataNo findings

    Why it is in this group

    • The name "get_formal_valuation_info" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "list" and "document": it reads documents.
    Description, as the server wrote it
    Lists the documents and typical steps for a formal US 409A valuation or UK EMI valuation, with contact details for Codon Valuation Advisors, the firm that provides this connector. Use when the user asks what a formal valuation requires or how to obtain one.

    Annotations the server declares

    • title: Get formal valuation requirements
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged untrusted-input or outbound.

Reads private data1
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Oct 22, 2026, 14:29 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
2
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
not observed
Authorization servers
not observed
Legacy HTTP+SSE transport
no
Dynamic client registration
not observed
Client ID metadata documents
not observed
  • WarnThe whole server

    The endpoint served tools/list without credentials, and the list has 2 tools that change things (2 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://mcp.codonvaluation.com/mcp: tools/list returned 3 tools to an anonymous client, including estimate_409a_value (write), estimate_emi_share_value (write)

    What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http codon-valuation https://mcp.codonvaluation.com/mcp
claude mcp add --transport http codon-valuation https://mcp.codonvaluation.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__codon-valuation__get_formal_valuation_info"
    ],
    "ask": [
      "mcp__codon-valuation__estimate_409a_value",
      "mcp__codon-valuation__estimate_emi_share_value"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as codon-valuation. Review it before you use it.

Capability tags behind 1 rule
  • mcp__codon-valuation__get_formal_valuation_info private-data

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.codonvaluation.mcp/codon-valuation/verify?hash=9f13a49d10aa886dd530235be58ae44345fe08d8c21ccaf78e3354c5d656a4ab" | jq -e '.changed == false'

Pinned hash 9f13a49d10aa, from Oct 21, 2026, 18:47 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.codonvaluation.mcp/codon-valuation/changes.xml

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anlyon.dev badge for com.codonvaluation.mcp/codon-valuation
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Source: MCP Registry. Synced Oct 21, 2026, 17:53 UTC.