How to connect Heroku to Claude Code

1. 1. Enable Heroku in Metorial

   In your Metorial portal, enable the Heroku MCP server and sign in with the account that owns the data. Access stays governed by your team policies.

2. 2. Add the server over HTTP

   Add --scope user to use it in every project.

   Copy

   claude mcp add --transport http metorial <your-magic-mcp-url>

3. 3. Sign in

   Run /mcp, select Metorial and sign in to load Heroku tools.

• Scale Formation: View or scale dyno formations for a Heroku app.
• Manage Collaborators: List, add, or remove collaborators who have access to a Heroku app.
• List Apps: List all Heroku applications accessible to the authenticated user.
• Get Account: Retrieve the authenticated user's Heroku account details including email, verification status, and two-factor authentication status.
• Update App: Update a Heroku application's settings.
• Create App: Create a new Heroku application.
• Delete App: Permanently delete a Heroku application.
• Manage Add-ons: List, provision, update, or remove add-on services for a Heroku app.
• Manage Dynos: List running dynos, run one-off dynos, or restart dynos for a Heroku app.
• Manage Log Drains: List, add, or remove log drains for a Heroku app.
• Manage Releases: List releases, get release details, or rollback to a previous release for a Heroku app.
• Get App: Retrieve detailed information about a specific Heroku app by its name or ID.
• Manage Config Vars: Read or update environment configuration variables for a Heroku app.
• Manage Builds: List, get, or create builds for a Heroku app.
• Manage Pipelines: Manage Heroku Pipelines for continuous delivery workflows.
• And 3 more on the Heroku MCP server page.

• Heroku tools appear as mcp__metorial__<tool>. Use that name in permission rules to allow or deny a tool.
• Run /mcp to see whether Metorial is connected and to sign in again.
• Claude Code warns when a tool result passes 10,000 tokens and caps it at 25,000 by default. Raise the cap with MAX_MCP_OUTPUT_TOKENS.
• Pre-approve trusted Heroku tools with allow rules in your settings so Claude Code stops asking each time.

claude mcp list shows "Needs authentication"

Run /mcp, select Metorial, and sign in. If sign-in keeps failing, choose Clear authentication in the same menu and sign in again.

A teammate sees "Pending approval"

Servers shared through a project .mcp.json need approval. Run claude in the project and approve Metorial when asked.

Large tool results are cut off

Claude Code limits MCP tool output to 25,000 tokens by default. Raise it with the MAX_MCP_OUTPUT_TOKENS environment variable.

Based on the Claude Code MCP documentation.