ProSignature email signatures

Builds the email-safe HTML signature (table + inline styles, the same bytes as prosignature.co/email-signature-generator) for one person. Returns html, a plain-text version, an edit_url that opens the generator prefilled, and install steps for Gmail, Outlook and Apple Mail. The output is the free plan: four layouts, six accent colours, no logo or photo, and a small clickable "Created with ProSignature" credit line under the signature (Pro removes it). Nothing is installed or stored.

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Full name (required)",
      "maxLength": 120
    },
    "title": {
      "type": "string",
      "description": "Job title",
      "maxLength": 120
    },
    "company": {
      "type": "string",
      "description": "Company or business name",
      "maxLength": 120
    },
    "phone": {
      "type": "string",
      "description": "Phone, as it should read; the tel: link keeps digits and +",
      "maxLength": 120
    },
    "email": {
      "type": "string",
      "description": "Email address",
      "maxLength": 120
    },
    "website": {
      "type": "string",
      "description": "Website: bare domain (https:// is added) or an http(s) URL",
      "maxLength": 200
    },
    "layout": {
      "type": "string",
      "enum": [
        "classic",
        "stacked",
        "minimal",
        "card"
      ],
      "description": "Layout id (default classic)"
    },
    "colour": {
      "type": "string",
      "pattern": "^#[0-9a-fA-F]{6}$",
      "description": "Accent colour #rrggbb (default #E8604C); the page offers #E8604C, #2B6CB0, #2F855A, #6B46C1, #2B2620, #B7791F"
    }
  },
  "required": [
    "name"
  ],
  "additionalProperties": false
}

The four signature layouts (id, name, what it looks like) and the six accent colours the generator offers.

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

List price for Pro (one person) or Teams (per person, 5-person minimum, no platform fee) for a number of people, billed yearly or monthly, computed from the rules in https://prosignature.co/pricing.json (verified 2026-10-18). The admin counts as one of the people. Free plan: $0, credit line. This is a quote, not a checkout: the human pays in the app after signing up.

{
  "type": "object",
  "properties": {
    "plan": {
      "type": "string",
      "enum": [
        "pro",
        "teams"
      ],
      "description": "pro = one person; teams = a company (admin + employees)"
    },
    "people": {
      "type": "integer",
      "minimum": 1,
      "maximum": 10000,
      "description": "How many people, admin included (default 1)"
    },
    "billing": {
      "type": "string",
      "enum": [
        "yearly",
        "monthly"
      ],
      "description": "Billing period (default yearly)"
    }
  },
  "required": [
    "plan"
  ],
  "additionalProperties": false
}

How a signature from create_signature gets into a mail client, honestly: Gmail web (paste, or the sendAs PATCH with gmail.settings.basic — new mail only), Gmail mobile, Outlook (copy-paste only, no directory sync), Apple Mail, iPhone. The free Chrome extension (auto-updates, covers replies) needs the human to sign up first.

{
  "type": "object",
  "properties": {
    "client": {
      "type": "string",
      "enum": [
        "gmail",
        "gmail_mobile",
        "outlook",
        "apple_mail",
        "iphone"
      ],
      "description": "Which mail client"
    }
  },
  "required": [
    "client"
  ],
  "additionalProperties": false
}

What ProSignature is, the free plan and its credit line, Pro and Teams prices (verified 2026-10-18), how Gmail and Google Workspace installs work per person, personal links for employees, what the product is NOT (no mail-flow enforcement, no Microsoft 365 sync, no analytics), and where the docs, OpenAPI and pricing.json are.

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