# How to integrate Railway MCP with Atomic Agent

```json
{
  "title": "How to integrate Railway MCP with Atomic Agent",
  "toolkit": "Railway MCP",
  "toolkit_slug": "railway_mcp",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/railway_mcp/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/railway_mcp/framework/atomic-agent.md",
  "updated_at": "2026-09-24T15:33:59.396Z"
}
```

## Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Railway.
This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Railway account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions.

## Also integrate Railway MCP with

- [ChatGPT](https://composio.dev/toolkits/railway_mcp/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/railway_mcp/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/railway_mcp/framework/hermes-agent)

## TL;DR

### How Atomic Agent connects to Railway
Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.
Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

## Connect Railway MCP to Atomic Agent

### Connect Railway to Atomic Agent
- Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key.
- In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
- Ask Atomic Agent to do something in Railway. It searches Composio for the right tool.
- On first use, open the sign-in link returned in the chat. Connect your Railway account, then return to Atomic Agent to continue.
### Headless setup
Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

```bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY
```

## What is the Railway MCP server, and what's possible with it?

The Railway MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Railway account. It provides structured and secure access so your agent can perform Railway operations on your behalf.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `RAILWAY_MCP_ACCEPT_DEPLOY` | Accept-deploy | DESTRUCTIVE: Commits all staged changes in a Railway environment and triggers a deploy. Only use this when the user has explicitly confirmed they want to deploy. |
| `RAILWAY_MCP_CREATE_DEPLOYMENT` | Create-deployment | Create a new service from a GitHub repository and trigger its first deployment. The repo must be one the authenticated user has connected via GitHub. Returns the new service; use get-status or list-deployments to follow the deploy. Before calling this tool you MUST have a GitHub repo to deploy. If the user has not provided one, do not guess — first ask them which GitHub repo to deploy (in 'owner/name' form). If they don't have a repo yet, offer to help create one: if you have tools available to create a GitHub repository (e.g. a GitHub MCP server or `gh` CLI), offer to scaffold and push one for them; otherwise point them to create a repo on GitHub and share its 'owner/name'. Only call this tool once a concrete repo has been confirmed. |
| `RAILWAY_MCP_CREATE_PROJECT` | Create-project | Create a new Railway project |
| `RAILWAY_MCP_CREATE_SERVICE` | Create-service | Create a new service in a project from a Docker image, or an empty service to configure later (e.g. before setting variables and attaching a source). To create a service from a GitHub repository, use create-deployment instead. |
| `RAILWAY_MCP_DELETE_FEATURE_FLAG` | Delete-feature-flag | Delete a project-scoped feature flag. Workspace-scoped flags cannot be deleted from project context. |
| `RAILWAY_MCP_FETCH_DOCS` | Fetch-docs | Fetch the full markdown content of a Railway documentation page by URL or slug (e.g. 'https://docs.railway.com/quick-start' or 'reference/variables'). Use search-docs first to find the right page. |
| `RAILWAY_MCP_GENERATE_DOMAIN` | Generate-domain | Expose a service publicly. Without `domain`, generates a Railway *.up.railway.app service domain (if the service already has domains, they are returned instead of creating another). With `domain`, attaches a custom domain you own and returns the DNS records the user must create for it to verify. If environmentId is omitted, the production environment is used. |
| `RAILWAY_MCP_GET_FEATURE_FLAG` | Get-feature-flag | Get a Railway feature flag (Signal) by name for a project or its parent workspace scope. |
| `RAILWAY_MCP_GET_LOGS` | Get-logs | Get logs from Railway for a deployment — covers deploy (runtime), build, and http (proxy request) contexts. Pass a specific deploymentId, or pass serviceId + environmentId to resolve the latest deployment. Use `types` to choose which streams to return (default: ['deploy']). |
| `RAILWAY_MCP_GET_SERVICE_CONFIG` | Get-service-config | Get a service's configuration in an environment: source (repo/image), build settings, deploy settings (start command, healthcheck, replicas, cron, restart policy), networking, and volume mounts. Variable names are listed but values are not included — use list-variables for values. If environmentId is omitted, the production environment is used. |
| `RAILWAY_MCP_GET_SERVICE_METRICS` | Get-service-metrics | Get resource usage metrics (CPU, memory, disk, network) for a service, summarized as current/average/min/max over a time window. Defaults to CPU_USAGE and MEMORY_USAGE_GB over the last hour. If environmentId is omitted, the production environment is used. |
| `RAILWAY_MCP_GET_STATUS` | Get-status | Get the deployment status of a Railway project environment. Returns project + environment metadata and, for each service in the environment, its latest deployment status, replica count, and cron schedule. If environmentId is omitted, the project's `production` environment is used when present, otherwise the oldest environment. |
| `RAILWAY_MCP_LIST_DEPLOYMENTS` | List-deployments | List recent deployments for a Railway project, optionally filtered by environment, service, or status. Returns the most recent first. |
| `RAILWAY_MCP_LIST_DOMAINS` | List-domains | List all domains (Railway-generated service domains and custom domains) for a service in an environment. If environmentId is omitted, the production environment is used. |
| `RAILWAY_MCP_LIST_FEATURE_FLAGS` | List-feature-flags | List Railway feature flags (Signals) for a project and optionally the parent workspace. Project flags are editable with admin access; workspace flags are read-only from project context. |
| `RAILWAY_MCP_LIST_PROJECTS` | List-projects | List all Railway projects accessible to the authenticated user |
| `RAILWAY_MCP_LIST_SERVICES` | List-services | List all services and environments in a Railway project |
| `RAILWAY_MCP_LIST_VARIABLES` | List-variables | List all environment variables for a service, fully rendered (reference variables like ${{Postgres.DATABASE_URL}} are resolved). With a Railway session or API token, values are returned in plaintext and may contain secrets. Connected OAuth apps receive variable names only. If environmentId is omitted, the production environment is used. |
| `RAILWAY_MCP_LIST_WORKSPACES` | List-workspaces | List the Railway workspaces the current user belongs to. Use a workspace ID with create-project to choose where a project is created. |
| `RAILWAY_MCP_RAILWAY_AGENT` | Railway-agent | Send a message to Railway's AI agent for complex infrastructure operations. The agent can inspect services, diagnose issues, and take actions on your behalf. |
| `RAILWAY_MCP_REDEPLOY` | Redeploy | Re-run the most recent deployment of a service in a given environment, reusing that deployment's existing build. Only works on a service that has already deployed in that environment — check with list-deployments if you are unsure. This does NOT give a service its first deployment: if it has never deployed, nothing here can deploy it, and create-deployment would build a separate new service from a GitHub repo rather than deploying this one. |
| `RAILWAY_MCP_SEARCH_DOCS` | Search-docs | Search the Railway documentation (docs.railway.com) for features, configuration, guides, and tutorials. Returns matching sections with URLs — use fetch-docs to read a full page. |
| `RAILWAY_MCP_SET_FEATURE_FLAG` | Set-feature-flag | Create a project-scoped feature flag or update its default value. Use list-feature-flags and get-feature-flag to inspect existing flags first. |
| `RAILWAY_MCP_SET_VARIABLES` | Set-variables | Set one or more environment variables on a service (or environment-wide shared variables when serviceId is omitted). Existing variables with the same name are overwritten; others are left unchanged. Reference syntax like ${{Postgres.DATABASE_URL}} is supported. Affected services are redeployed unless skipDeploys is true. |
| `RAILWAY_MCP_UPDATE_SERVICE` | Update-service | Update a service's configuration: build/start/pre-deploy commands, healthcheck, sleep mode, root directory, cron schedule, Dockerfile path, restart policy, config file path, and watch patterns. Only the fields you pass are changed. Changes apply on the service's next deployment (use redeploy to apply immediately). Scaling (replicas/regions) and source changes are not handled by this tool. |
| `RAILWAY_MCP_WHOAMI` | Whoami | Get the current authenticated Railway user's profile information |

## Supported Triggers

None listed.

## Troubleshooting

### Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

### Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

### Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection.

## Complete Code

None listed.

## Conclusion

### Use Railway from Atomic Agent
With your account connected, ask Atomic Agent to work with Railway in natural language. You can connect more apps through the same Composio integration as you need them.
Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo).

## How to build Railway MCP Agent with another framework

- [ChatGPT](https://composio.dev/toolkits/railway_mcp/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/railway_mcp/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/railway_mcp/framework/hermes-agent)

## Related Toolkits

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- [Appveyor](https://composio.dev/toolkits/appveyor) - AppVeyor is a cloud-based continuous integration service for building, testing, and deploying applications. It helps developers automate and streamline their software delivery pipelines.
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- [Azure Monitor Activity Log](https://composio.dev/toolkits/azure_monitor_activity_log) - Azure Monitor Activity Log is Azure's service that records management and control-plane events for a subscription. Use it to audit changes, troubleshoot issues, and track resource operations across your Azure resources.
- [Backendless](https://composio.dev/toolkits/backendless) - Backendless is a backend-as-a-service platform for mobile and web apps, offering database, file storage, user authentication, and APIs. It helps developers ship scalable applications faster without managing server infrastructure.
- [Baserow](https://composio.dev/toolkits/baserow) - Baserow is an open-source no-code database platform for building collaborative data apps. It makes it easy for teams to organize data and automate workflows without writing code.
- [Bench](https://composio.dev/toolkits/bench) - Bench is a benchmarking tool for automated performance measurement and analysis. It helps you quickly evaluate, compare, and track your systems or workflows.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Railway MCP?

With a standalone Railway MCP server, the agents and LLMs can only access a fixed set of Railway tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Railway and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Atomic Agent?

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Railway tools.

### Can I manage the permissions and scopes for Railway while using Tool Router?

Yes, absolutely. You can configure which Railway scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Railway data and credentials are handled as safely as possible.

---
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