Compare domain prices across 145+ registrars and 1,100+ TLDs, find promo codes, check availability.
Live domain prices from 145+ registrars and 1,100+ TLDs, as a remote Model Context Protocol server. Ask your AI assistant where a domain is cheapest to register, renew or transfer, compare extensions, find promo codes and check availability — with real, daily-updated prices from TLDers.
Use it two ways: connect to the hosted server at https://www.tlders.com/api/mcp, or run this repository's small local (stdio) server, which forwards each tool call to the hosted one with your key.
| Client | Setting |
|---|---|
| Clients that support headers (Claude Code, Cursor, VS Code, MCP Inspector) | URL https://www.tlders.com/api/mcp, header Authorization: Bearer tld_live_... |
| claude.ai custom connectors and other clients without header support | URL https://www.tlders.com/api/mcp?key=tld_live_... |
Claude Code:
claude mcp add --transport http tlders https://www.tlders.com/api/mcp \
--header "Authorization: Bearer tld_live_..."
Treat a URL with ?key= like a password. If it leaks, revoke the key from your TLDers account and create a new one.
For Claude Desktop's config file and other clients that run local servers. Needs Node.js 18+.
{
"mcpServers": {
"tlders": {
"command": "npx",
"args": ["-y", "@tlders/mcp"],
"env": { "TLDERS_API_KEY": "tld_live_..." }
}
}
}
To run the server from source instead of the published package (useful while changing it), clone this repo, run npm install, then use "command": "node", "args": ["/path/to/tlders-mcp/index.js"]. It reads the same TLDERS_API_KEY variable, and TLDERS_MCP_URL overrides the hosted endpoint.
This repo is also an Agent Plugins package (plugin.json + mcp.json) that connects to the hosted server. Once installed, add your key by passing it as the api_key argument or switching the server URL to https://www.tlders.com/api/mcp?key=tld_live_....
| Tool | What it does |
|---|---|
find_cheapest_tlds | Cheapest registrar per extension for first-year registration, renewal, transfer and 3-year total |
get_tld_prices | Every registrar's register / renew / transfer price for one extension, cheapest first |
compare_tlds | Compare registrar prices across up to 20 extensions |
get_tld_price_history | Per-registrar registration and renewal price history |
list_promo_codes | Active registrar promo codes, biggest discount first |
check_domain_availability | Live availability for a full domain name (RDAP, WHOIS fallback) |
list_registrars | Every tracked registrar with WHOIS-privacy info |
Prices are USD per year. First-year prices are often promotions, so the renewal price is always included.
| Plan | Limit |
|---|---|
| Free | 100 requests a month, one key |
| Monthly ($5) / Yearly | 1,000 requests a day per key, up to 5 keys, plus bulk prices |
Full API docs and the OpenAPI spec: https://www.tlders.com/developers
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y @tlders/mcpMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"com-tlders-domain-prices": {
"command": "npx",
"args": [
"-y",
"@tlders/mcp"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup reference@tlders/mcpnpmTLDers Domain Prices works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.