list_clients
List the email clients this deployment can render right now, with their rendering tier, engine, and capabilities
Takes no parameters.
Inbox Preview
ai.powerlinePublished by powerline.aiOfficial publisherv0.1.0Updated Oct 24, 2026
Render HTML/.eml emails in real Gmail, Outlook & Yahoo web clients and screenshot them
Overview
AI-generated overview
Lets an assistant render emails in real Gmail, Outlook and Yahoo web clients and capture screenshots.
- What you can do
- It submits an email to real webmail clients for rendering and returns screenshots. Tools list the available clients, submit full HTML or a raw .eml file to start a render job, poll job status and screenshots, and fetch an image URL for a given client, width and environment.
- When to use it
- Use it when you need to check how a marketing or transactional email actually renders in Gmail, Outlook and Yahoo web clients without testing each one by hand.
- Requirements
- Network access to the remote endpoint at no environment variables, headers or authentication are declared.
Before you install
Submitted email HTML or .eml content is sent to a third-party service for rendering and may contain recipient or other sensitive information; confirm what may be disclosed first.
Installation
In SourceWeft
- Open Inbox Preview in the dashboard and add it to a workspace.
- Enable the server for the chats that should use its tools.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Use with an agent
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/ai.powerline%2Finbox-preview/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.Other MCP clients
Add this to your client's mcpServers config.
{
"mcpServers": {
"inbox-preview": {
"type": "http",
"url": "https://api.powerline.ai/v1/mcp"
}
}
}Tools
4submit_preview
Submit an email for rendering across email clients — full HTML, or a complete raw .eml (base64). Provide exactly one of html/eml. Returns a job ID to poll for results.
Parameters
emlhtmlrenderssubjectinclude_previewsinclude_full_pageget_job
Get the status and screenshots for a preview job. Poll until status is "completed".
Parameters
job_idrequiredget_screenshot
Fetch a rendered screenshot. Returns the image URL for the given job, client, width, and environment (color scheme / images).
Parameters
clientrequiredjob_idrequiredcolor_schemeviewport_widthrequiredimages_disabledVersion history
1- v0.1.0LatestSep 16, 2026
Score
72% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
- Reached in the last 30 daysRequired25 pts
- Auth declaredRequired10 pts
- Tools listedRequired15 pts
- DescriptionRequired15 pts
- Logo10 pts
Publish an icon in the registry entry.
- Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
- LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.