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GoCodebook — California Building Codes

by gocodebook.com · remote · no sign-in to list tools · v1.0.0 · published by com.gocodebook

Verbatim California Title 24 and local zoning code lookup by section number, with citations.

Changes · 2
CompareRegistry entry

3 tools: 2 change things and 1 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http codes https://gocodebook.com/api/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • Warnlookup_california_code_section

    The server marks "lookup_california_code_section" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "lookup_california_code_section" says "lookup": a word for reading.

    What this check looks for
  • Warnsearch_california_codes

    The server marks "search_california_codes" as not read-only (readOnlyHint: false), and its words say it reads.

    Matched text

    annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "search_california_codes" says "search": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Changes things 2Claude Code: ask
  • lookup_california_code_sectionLook up the VERBATIM text of a California building, residential, fire, plumbing, mechanical, green (CALGreen), energy or existing-building code section, or a section of a Californi…1 finding

    Why it is in this group

    • The name "lookup_california_code_section" says "lookup": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "lookup_california_code_section" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "lookup_california_code_section" says "lookup": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Look up the VERBATIM text of a California building, residential, fire, plumbing, mechanical, green (CALGreen), energy or existing-building code section, or a section of a California city or county zoning/municipal ordinance, by its section number. Use this whenever the user cites a section number ("CRC R602.10.2.3", "CBC 1004", "§ 17.60.090") or asks what a specific section says. Returns the official text with its citation, edition and a link to the full section. It returns code text only and does not determine whether a specific project complies.

    Annotations the server declares

    • title: Look up a California code section
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: true
  • search_california_codesSearch California building codes (Title 24), state housing law and California city and county zoning/municipal codes by TOPIC, when the user does not already have a section number …1 finding

    Why it is in this group

    • The name "search_california_codes" says "search": a word for reading.
    • The server marks it as not read-only (readOnlyHint: false).

    Findings

    • Warn

      The server marks "search_california_codes" as not read-only (readOnlyHint: false), and its words say it reads.

      Matched text

      annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "search_california_codes" says "search": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Search California building codes (Title 24), state housing law and California city and county zoning/municipal codes by TOPIC, when the user does not already have a section number — e.g. "minimum attic access opening", "ADU setbacks in San Jose". Requires the user's GoCodebook account and uses 1 credit per search (also when nothing is found). If the user already cites a section number, use lookup_california_code_section instead — it is free. Returns ranked excerpts with citations and links. It does NOT decide whether a project complies.

    Annotations the server declares

    • title: Search California codes (uses 1 credit)
    • readOnlyHint: false
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: false
Only reads 1Claude Code: allow
  • list_california_code_documentsList the California codes and local ordinances available for lookup, and what is not covered.No findings

    Why it is in this group

    • The name "list_california_code_documents" says "list": a word for reading.
    Description, as the server wrote it
    List the California codes and local ordinances available for lookup, and what is not covered. Useful before concluding that a code is unavailable, and for finding the exact document or jurisdiction slug that a lookup takes.

    Annotations the server declares

    • title: List the California codes available
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: true

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.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http codes https://gocodebook.com/api/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__codes__list_california_code_documents"
    ],
    "ask": [
      "mcp__codes__lookup_california_code_section",
      "mcp__codes__search_california_codes"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as codes. Review it before you use it.