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Agent skill

Railway Domain

by davila7 in davila7/claude-code-templates

Add, view, or remove domains for Railway services. An agent skill from davila7/claude-code-templates.

MITAuto-check passedDevOps & Cloud

Install Railway Domain

skills CLI
$ npx skills add davila7/claude-code-templates --skill railway-domain -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install davila7/claude-code-templates railway-domain --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/davila7/claude-code-templates.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cli-tool/components/skills/railway/domain .claude/skills/railway-domain && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
railway-domain
GitHub stars
33k
Token cost
~744 tokens
SKILL.md length
201 words
Files
1
Skills in repo
479
Repo updated
First seen
Licence
MIT

At a glance

Add, view, or remove domains for Railway services. An agent skill from davila7/claude-code-templates.

  • User wants to add a domain
  • SKILL.md covers When to Use, Add Railway Domain, Add Custom Domain and Read Current Domains, plus 4 more sections
  • Calls railway
  • Generate a railway domain

What it does

Railway Domain is an agent skill from davila7/claude-code-templates. Add, view, or remove domains for Railway services. Use when user wants to add a domain, generate a railway domain, check current domains, get the URL for a service, or remove a domain.

Its SKILL.md is about 740 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in DevOps & Cloud. The repository describes itself as: CLI tool for configuring and monitoring Claude Code. The licence is MIT.

When your agent uses it

  • User wants to add a domain
  • Generate a railway domain
  • Check current domains
  • Get the URL for a service

Example prompts

  • “/railway-domain”

Requirements

  • Pre-approved tools (allowed-tools): Bash(railway:*)

What it can do on your machine

Read from SKILL.md and the folder at commit c0ca7da. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Bash(railway:*)

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • railway

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Railway Domain loads about 744 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 201 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~50
When it runs · the whole SKILL.md, loaded when a task matches
~744

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from davila7/claude-code-templates at commit c0ca7da, republished under its MIT licence (© davila7). 201 words, ~744 tokens.

Download SKILL.mdSave it as .claude/skills/railway-domain/SKILL.md (or your agent's skills folder).
name
railway-domain
description
Add, view, or remove domains for Railway services. Use when user wants to add a domain, generate a railway domain, check current domains, get the URL for a service, or remove a domain.
allowed-tools
Bash(railway:*)
version
1.0.0
author
Railway
license
MIT
tags
Railway, Domain, DNS, URL, Custom Domain, Infrastructure
dependencies
railway-cli

Railway Domain Management

Add, view, or remove domains for Railway services.

When to Use

  • User asks to "add a domain", "generate a domain", "get a URL"
  • User wants to add a custom domain
  • User asks "what's the URL for my service"
  • User wants to remove a domain

Add Railway Domain

Generate a railway-provided domain (max 1 per service):

bash
railway domain --json

For a specific service:

bash
railway domain --json --service backend
Response

Returns the generated domain URL. Service must have a deployment.

Add Custom Domain

bash
railway domain example.com --json
Response

Returns required DNS records:

json
{
  "domain": "example.com",
  "dnsRecords": [
    { "type": "CNAME", "host": "@", "value": "..." }
  ]
}

Tell user to add these records to their DNS provider.

Read Current Domains

Use railway-environment skill to see configured domains, or query directly:

graphql
query domains($envId: String!) {
  environment(id: $envId) {
    config(decryptVariables: false)
  }
}

Domains are in config.services.<serviceId>.networking:

  • serviceDomains - Railway-provided domains
  • customDomains - User-provided domains

Remove Domain

Use railway-environment skill to remove domains:

Remove custom domain
json
{
  "services": {
    "<serviceId>": {
      "networking": {
        "customDomains": { "<domainId>": null }
      }
    }
  }
}
Remove railway domain
json
{
  "services": {
    "<serviceId>": {
      "networking": {
        "serviceDomains": { "<domainId>": null }
      }
    }
  }
}

Then use railway-environment skill to apply and commit the change.

CLI Options

FlagDescription
[DOMAIN]Custom domain to add (omit for railway domain)
-p, --port <PORT>Port to connect
-s, --service <NAME>Target service (defaults to linked)
--jsonJSON output

Composability

  • Read domains: Use railway-environment skill
  • Remove domains: Use railway-environment skill
  • Apply removal: Use railway-environment skill
  • Check service: Use railway-service skill

Error Handling

No Service Linked
No service linked. Use --service flag or run `railway service` to select one.
Domain Already Exists
Service already has a railway-provided domain. Maximum 1 per service.
No Deployment
Service has no deployment. Deploy first with `railway up`.
Invalid Domain
Invalid domain format. Use a valid domain like "example.com" or "api.example.com".

© davila7, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in cli-tool/components/skills/railway/domain of davila7/claude-code-templates.

Open the folder on GitHubat commit c0ca7da

Compare with similar skills

Railway Domain next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Railway Domain compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Railway Domain this skilldavila7/claude-code-templates33k—~744Automated safety check: PassMIT
Monitor CInrwl/nx29k6 repos~4.7kAutomated safety check: PassMIT
Terraform and OpenTofu Guideagentscope-ai/QwenPaw36k6 repos~4.2kAutomated safety check: PassApache-2.0
Vercel Optimize Auditvercel-labs/agent-skills32k8 repos~4.3kAutomated safety check: PassNone
Analyze GitHub Action Logswithastro/astro63k1 repos~1.3kAutomated safety check: PassCustom licence
Openclaw Live Updateropenclaw/openclaw392k—~3.7kAutomated safety check: PassMIT

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Categories

Questions about Railway Domain

What does Railway Domain do?

Add, view, or remove domains for Railway services. An agent skill from davila7/claude-code-templates. Railway Domain is an agent skill from davila7/claude-code-templates. Add, view, or remove domains for Railway services.

When should I use Railway Domain?

Railway Domain fits situations like: user wants to add a domain; generate a railway domain; check current domains; get the URL for a service.

How do I install Railway Domain in Claude Code?

Run `npx skills add davila7/claude-code-templates --skill railway-domain -a claude-code`. Or copy the skill folder (cli-tool/components/skills/railway/domain in davila7/claude-code-templates) into .claude/skills/railway-domain in your project. Claude Code loads it when a task matches its description.

How do I install Railway Domain in Codex?

Run `npx skills add davila7/claude-code-templates --skill railway-domain -a codex`. Or copy the skill folder (cli-tool/components/skills/railway/domain in davila7/claude-code-templates) into .agents/skills/railway-domain in your project. Codex loads it when a task matches its description.

Can I use Railway Domain in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add davila7/claude-code-templates --skill railway-domain -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/railway-domain, .gemini/skills/railway-domain, .github/skills/railway-domain and .opencode/skills/railway-domain in your project.

What does Railway Domain need to run?

Going by SKILL.md and its folder, Railway Domain needs the command-line tools its instructions call (railway). Its frontmatter pre-approves these tools: Bash(railway:*).

Does Railway Domain access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Railway Domain safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Railway Domain use?

Railway Domain is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Railway Domain use?

About 744 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Railway Domain?

Skills that share tags, products or a category with Railway Domain: Monitor CI (nrwl/nx, 29k stars), Terraform and OpenTofu Guide (agentscope-ai/QwenPaw, 36k stars), Vercel Optimize Audit (vercel-labs/agent-skills, 32k stars) and Analyze GitHub Action Logs (withastro/astro, 63k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Railway Domain?

davila7 (a GitHub user) maintains it in davila7/claude-code-templates, which has 32,512 GitHub stars. The repository holds 479 skills in this directory. The repository was last updated on October 10, 2026.

Source: davila7/claude-code-templates on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.