Inbox Preview
Render HTML/.eml emails in real Gmail, Outlook & Yahoo web clients and screenshot them
Connect it
Settings → Connectors → Add custom connector
URL: https://api.powerline.ai/v1/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.powerline.ai/v1/mcp{
"mcpServers": {
"inbox-preview": {
"url": "https://api.powerline.ai/v1/mcp"
}
}
}claude mcp add --transport http inbox-preview https://api.powerline.ai/v1/mcp{
"servers": {
"inbox-preview": {
"type": "http",
"url": "https://api.powerline.ai/v1/mcp"
}
}
}4 tools, verified live
list_clientsList the email clients this deployment can render right now, with their rendering tier, engine, and capabilities
submit_previewSubmit an email for rendering across email clients â full HTML, or a complete raw .eml (base64). Provide exactly one of html/eml. Returns a job ID to poll for results.
get_jobGet the status and screenshots for a preview job. Poll until status is "completed".
get_screenshotFetch a rendered screenshot. Returns the image URL for the given job, client, width, and environment (color scheme / images).
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