# Inbox Preview Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Inbox Preview

Preview how emails render in Gmail, Outlook and Yahoo with screenshots

- Record: https://musedirectory.ai/connector/inbox-preview
- Category: Marketing & Ads
- Developer: Powerline (https://powerline.ai/inbox-preview/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 886ms, checked 2026-09-28T09:01:34Z
- Endpoint: https://api.powerline.ai/v1/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-24T06:25:58Z)
- Source: Found in the official MCP Registry (ai.powerline/inbox-preview) https://registry.modelcontextprotocol.io/v0/servers?search=ai.powerline%2Finbox-preview

Renders HTML emails and raw .eml files in real Gmail, Outlook and Yahoo web clients, capturing screenshots to show how messages appear in inboxes and when opened. Helps verify email design and rendering before sending campaigns.

Example request: "Show me how this email campaign will look when my customers open it in Gmail and Outlook"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Inbox Preview to help me. It is a free service with an MCP server at https://api.powerline.ai/v1/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- list_clients: List the email clients this deployment can render right now, with their rendering tier, engine, and capabilities
- submit_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.
- get_job: Get the status and screenshots for a preview job. Poll until status is "completed".
- get_screenshot: Fetch a rendered screenshot. Returns the image URL for the given job, client, width, and environment (color scheme / images).

Screening checks:
- MCP handshake: pass (Answered in 580ms)
- Domain against threat feeds (Cloudflare security DNS): pass (api.powerline.ai, powerline.ai not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (4 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 2246 days ago)
- AI review of purpose and tool behavior: pass (No concerns)