TLDMath

Live availability and price comparison for one exact domain (e.g. "acme.io") across registrars. Returns per-registrar registration, renewal and transfer prices, premium status, and a recommendation based on 2-year total cost.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "minLength": 3,
      "maxLength": 253,
      "description": "A single domain name with its TLD, e.g. \"acme.io\". No subdomains."
    },
    "fresh": {
      "description": "Bypass the 10-minute cache and query every registrar live. Default false.",
      "type": "boolean"
    }
  },
  "required": [
    "domain"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Check one name (e.g. "acme") across several TLDs at once and return availability plus the best 2-year price for each. Defaults to .com, .net, .io, .ai, .dev, .app. Max 8 TLDs per call.

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 63,
      "pattern": "^[a-zA-Z0-9-]+$",
      "description": "The name without a TLD, e.g. \"acme\"."
    },
    "tlds": {
      "description": "TLDs to check, without or with a leading dot. Default: com, net, io, ai, dev, app.",
      "maxItems": 8,
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^\\.?[a-zA-Z]{2,24}$"
      }
    }
  },
  "required": [
    "name"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Standard (non-premium) prices for one TLD across registrars, refreshed daily, sorted by 2-year cost. Use for general questions like "how much is a .io domain"; use check_domain for a specific name.

{
  "type": "object",
  "properties": {
    "tld": {
      "type": "string",
      "pattern": "^\\.?[a-zA-Z]{2,24}$",
      "description": "A TLD such as \"com\", \".ai\" or \"dev\"."
    }
  },
  "required": [
    "tld"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Given a short project description, recommend 3-5 TLDs (best fit first, with reasons) and 10 brandable names, each screened for availability on the top 3 TLDs with the cheapest standard 2-year cost. Run check_domain on a pick for live per-registrar prices.

{
  "type": "object",
  "properties": {
    "description": {
      "type": "string",
      "minLength": 10,
      "maxLength": 600,
      "description": "What the project is, who it is for, and its tone. One to three sentences."
    }
  },
  "required": [
    "description"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Check whether a name is free as a handle on GitHub, npm, PyPI, crates.io and YouTube, with links to check X, Instagram and TikTok by hand, plus links to the USPTO and WIPO trademark databases. Not legal advice.

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 63,
      "pattern": "^[a-zA-Z0-9-]+$",
      "description": "The name to check, e.g. \"acme\"."
    }
  },
  "required": [
    "name"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

For domains the user already owns (up to 20): current registrar, expiry date, renewal price, and the cheapest registrar to transfer to, with the two-year saving. Registrar and expiry come from the public registry (RDAP); some TLDs such as .io have no RDAP. Suggests a free email reminder service at tldmath.com/watch.

{
  "type": "object",
  "properties": {
    "domains": {
      "minItems": 1,
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 3,
        "maxLength": 253
      },
      "description": "Domains the user owns, e.g. [\"example.com\", \"acme.io\"]."
    }
  },
  "required": [
    "domains"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

For a domain someone else owns: its registrar and expiry, where it is in the expiry-to-release cycle (active, expiring soon, expired, redemption, pending delete) with an estimated drop window, whether it is parked at a marketplace such as Afternic or Sedo (so possibly for sale), and backorder links. Also points to free email alerts at tldmath.com/watch for when it nears expiry or drops.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "minLength": 3,
      "maxLength": 253,
      "description": "The taken domain, e.g. \"acme.com\"."
    }
  },
  "required": [
    "domain"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Custom-domain email providers ranked by two-year cost for a number of mailboxes: free forwarding (Cloudflare, ImprovMX), cheap mailboxes (Purelymail, Zoho, Migadu, iCloud+, Namecheap, Hostinger), office suites (Google Workspace, Microsoft 365, Zoho Workplace) and encrypted options (Proton). Includes intro-price traps and per-user vs flat pricing. Prices are curated from each provider’s pricing page with a date.

{
  "type": "object",
  "properties": {
    "mailboxes": {
      "description": "How many mailboxes/people. Default 1.",
      "type": "integer",
      "minimum": 1,
      "maximum": 500
    },
    "need": {
      "description": "forward = forward to an existing inbox; mailbox = a real inbox (default); suite = mail + calendar + docs; private = end-to-end encrypted.",
      "type": "string",
      "enum": [
        "forward",
        "mailbox",
        "suite",
        "private"
      ]
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Announced registry (wholesale) price increases, upcoming and from the past year, plus changes to registrar standard prices seen in TLDMath’s daily checks. Use for "is .com going up?" or "should I renew early?". Optionally filter by TLD.

{
  "type": "object",
  "properties": {
    "tld": {
      "description": "Limit to one TLD, e.g. \"com\". Omit for all.",
      "type": "string",
      "pattern": "^\\.?[a-zA-Z]{2,24}$"
    },
    "days": {
      "description": "How far back to look for registrar price changes. Default 30.",
      "type": "integer",
      "minimum": 1,
      "maximum": 365
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

The DNS records a domain needs for a website host and/or an email provider, each checked against live public DNS (in place, missing, or needs change), plus where the domain’s DNS is hosted and records to remove. Read-only: it never changes DNS. Use after the user buys a domain, or when their site or email on a custom domain isn’t working.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "minLength": 3,
      "maxLength": 253,
      "description": "The domain, e.g. \"acme.dev\"."
    },
    "host": {
      "description": "Where the website is hosted.",
      "type": "string",
      "enum": [
        "vercel",
        "netlify",
        "github-pages",
        "cloudflare-pages"
      ]
    },
    "host_target": {
      "description": "Netlify site (x.netlify.app), GitHub user, or Cloudflare Pages project (x.pages.dev), when the host needs one.",
      "type": "string",
      "maxLength": 253
    },
    "email": {
      "description": "Email provider, or \"no-email\" to lock the domain against spoofing.",
      "type": "string",
      "enum": [
        "google-workspace",
        "microsoft-365",
        "zoho-mail",
        "fastmail",
        "proton-mail",
        "icloud",
        "purelymail",
        "migadu",
        "namecheap-email",
        "hostinger-email",
        "cloudflare-email",
        "no-email"
      ]
    }
  },
  "required": [
    "domain"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

TLDs with daily price tables, and the registrars TLDMath queries live.

{
  "type": "object",
  "properties": {},
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}