SignatureForever
https://signatureforever.com/mcp ↗
Description
Audit and build email signatures that survive Gmail, Outlook desktop and Apple Mail.
What our measurements say
SignatureForever is a remote MCP server published at signatureforever.com. It has been probed 12 times since 9/12/2026. It answered in 12 of them (100.0%), a near-uninterrupted record. Median response time is 800 ms, a delay an agent will notice. It offers a narrow, focused set of 5 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Most tool names clearly indicate their purpose (e.g., 'check_email_signature', 'create_email_signature').
- Descriptions generally explain use cases (e.g., 'use this when a signature renders wrong').
Weaknesses
- Some descriptions are cut off (e.g., 'images do' in 'check_email_signature').
- Parameter details (optional/required) are not consistently explained in descriptions.
- No mention of error handling or constraints in tool descriptions.
check_email_signature— Description cut off mid-sentence ('images do').email_client_compatibility_matrix— Parameter 'feature' is optional, but description doesn't clarify this.create_email_signature— Optional parameters (e.g., 'template', 'accent_color') not explicitly marked as optional in description.
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test passed · last run:
- Cold-start: cold 162ms → warm 188ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
check_email_signatureAudit any email-signature HTML against what Gmail, Outlook 365, Outlook for Windows desktop, Apple Mail and iOS Mail actually do. Returns a verdict per client plus every problem found, each with the rule it breaks, why it breaks, and how to fix it. Use this when a signature renders wrong, images do not show, layout collapses in Outlook, or before sending a signature to a client. Free, no account needed.
htmlstringrequired
email_client_compatibility_matrixThe support matrix for the HTML and CSS features that decide whether an email signature survives: tables, flex/grid, <style> blocks, background-image, base64 images, border-radius, letter-spacing, text-transform, web fonts, max-width, margins and image sizing. Each row says yes/no/partial for seven real clients and explains what goes wrong. Use it to answer questions about email HTML support.
featurestring
list_signature_templatesThe signature layouts you can pass to create_email_signature, with what each one is good for and its width in pixels.
create_email_signatureBuild ready-to-paste email-signature HTML from a person's details. The output follows every rule that keeps a signature intact in Outlook for Windows and Gmail: tables only, inline CSS, absolute pixel widths, email-safe fonts, and images by absolute URL (never base64, which Gmail refuses to render). The free result carries one small credit line at the bottom; get_pricing explains how to remove it.
full_namestringrequiredjob_titlestringcompanystringemailstringphonestringwebsitestringcitystringphoto_urlstringlinkedinstringinstagramstringwhatsappstringtemplatestringaccent_colorstringlanguagestring
get_pricingWhat each SignatureForever plan includes and costs, and the link to buy. Use it when the user asks what removing the credit line costs, how many signatures a plan allows, or what happens to hosted images if they stop paying.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
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[](https://mcpmetrics.io/servers/com-signatureforever-email-signatures)<a href="https://mcpmetrics.io/servers/com-signatureforever-email-signatures"><img src="https://mcpmetrics.io/badge/com.signatureforever/email-signatures/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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