SignatureForever

Audit 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.

{
  "type": "object",
  "properties": {
    "html": {
      "type": "string",
      "description": "The full HTML of the email signature to audit."
    }
  },
  "required": [
    "html"
  ]
}

The 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.

{
  "type": "object",
  "properties": {
    "feature": {
      "type": "string",
      "description": "Optional. Filter to rows whose feature name contains this text, e.g. 'base64' or 'font'."
    }
  }
}

The signature layouts you can pass to create_email_signature, with what each one is good for and its width in pixels.

{
  "type": "object",
  "properties": {}
}

Build 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.

{
  "type": "object",
  "properties": {
    "full_name": {
      "type": "string",
      "description": "Person's full name. Required."
    },
    "job_title": {
      "type": "string"
    },
    "company": {
      "type": "string"
    },
    "email": {
      "type": "string"
    },
    "phone": {
      "type": "string"
    },
    "website": {
      "type": "string"
    },
    "city": {
      "type": "string",
      "description": "City, or city and state."
    },
    "photo_url": {
      "type": "string",
      "description": "Absolute https URL of a photo or logo. Anything else is ignored."
    },
    "linkedin": {
      "type": "string"
    },
    "instagram": {
      "type": "string"
    },
    "whatsapp": {
      "type": "string"
    },
    "template": {
      "type": "string",
      "enum": [
        "ficha",
        "cinta",
        "sello",
        "monolinea"
      ],
      "description": "Layout. Defaults to 'ficha'. Call list_signature_templates for what each one looks like."
    },
    "accent_color": {
      "type": "string",
      "description": "Hex colour like #B4522F. Defaults to the SignatureForever vermilion."
    },
    "language": {
      "type": "string",
      "enum": [
        "es",
        "en"
      ],
      "description": "Language of the credit line. Defaults to 'en'."
    }
  },
  "required": [
    "full_name"
  ]
}

What 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.

{
  "type": "object",
  "properties": {}
}