How do I install temper?

On macOS and Linux, run: brew install jongjinchoi/temper-domains/temper. On any platform with Node.js 22.12.0 or newer, run: npm i -g temper-domains.

What operating systems does temper support?

temper runs on macOS, Linux, and Windows through release binaries or npm. Homebrew installation supports macOS and Linux.

Yes. temper is open-source software released under the AGPL-3.0-only license.

How many TLDs does temper check?

30 TLDs by default. Use --extended for 60, --tlds for chosen extensions including co.uk, or --category for an industry. Use temper extensions to browse the full supported catalog by industry, purpose and region.

What is MCP and how does temper use it?

MCP (Model Context Protocol) lets AI assistants like Codex, Claude, and Cursor call external tools. Running 'temper mcp' starts a local stdio server exposing seven tools: list_supported_tlds, search_domain, search_names, suggest_domain, check_domain_availability, whois_domain, and open_registrar.

NEW · v0.7.2MADE IN GANGHWA / KOREAAGPL 3.0

v0.7.230 TLDsAGPL-3.0-only

Never open a browser
to find a domain.
Just type & go.

temper is a terminal-first domain search CLI — 30 TLDs by default with an automatic 5–30s budget and no telemetry in the CLI/MCP flow. Also an MCP server, so Codex, Claude, and Cursor can search on your behalf.

> temper search gethalden resolving 7 TLDs... gethalden.com … resolving gethalden.io … resolving gethalden.dev … resolving gethalden.app … resolving gethalden.ai … resolving gethalden.co … resolving gethalden.biz … resolving

Seven facts about temper.

Opinionated defaults. No configuration required.

№ 01 / PRIVACY

Private by default.

CLI and MCP queries run on your machine. No tracking, no telemetry. The hosted demo uses a server-side API route for live checks.

№ 02 / SPEED

Fast.

Checks 30 TLDs by default with an automatic 5–30s budget. 60 with --extended.

№ 03 / AI

MCP native.

Codex, Claude Code, Claude Desktop, Cursor — query temper directly.

№ 04 / INPUT

Keyboard-first.

Vim nav. Enter to choose a registrar and open its page.

№ 05 / OUTPUT

Pipe-friendly.

--format json pipes into jq, grep, any shell script.

№ 06 / STYLE

Themeable.

7 built-in themes — 5 dark, 2 light.

№ 07 / LICENSE

Open source.

AGPL-3.0-only. Zero telemetry. Read every line before you run it.

∞ / INSTALL

One command.

brew install jongjinchoi/temper-domains/temper

Let Codex do the typing.

// temper speaks MCP over stdio — codex · claude · cursor · windsurf · cline

AI-native, local-only.

temper runs as a local MCP server. Your AI assistant searches domains, discovers extensions by industry, purpose or region, and checks only the extensions you choose. On request, it can resume exact unresolved candidates while respecting server waits, or open registrar pages.

When invoked through your local MCP server, temper does not proxy requests through a temper-hosted service.

list_supported_tldssearch_domainsearch_namessuggest_domaincheck_domain_availabilitywhois_domainopen_registrar

# Codex CLI / IDE extension
$ codex mcp add temper -- temper mcp

# or ~/.codex/config.toml
[mcp_servers.temper]
command = "temper"
args = ["mcp"]

# in the Codex TUI
$ /mcp

The reference card.

Everything temper does, on one page. Tear it out.

CMD / 01

temper search <name>

Check 30 TLDs, 60 with --extended, or chosen extensions with --tlds.

$ temper search gethalden --tlds com,dev,co.uk

CMD / 02

temper suggest <name>

Generate prefix/suffix combinations. get·, try·, ·app, ·hq.

$ temper suggest gethalden -p use,try -s app,hq

CMD / 03

temper whois <domain>

Registrar, expiry, nameservers, DNSSEC, EPP. RDAP/WHOIS.

$ temper whois example.com --format json

CMD / 04

temper watch <domain>

Track availability. temper list shows the watchlist.

$ temper watch gethalden.com

CMD / 05

temper history

Interactive search history. Re-run or remove previous searches.

$ temper history

CMD / 06

temper mcp

Start the MCP server over stdio. For Codex/Claude/Cursor configs.

$ temper mcp

CMD / 07

temper extensions

Browse supported extensions by industry, purpose or region. Offline, 50 per page (max 100).

$ temper extensions --categories

CMD / 08

temper update

Check for a new version. Verified npm/Homebrew installs update after confirmation; --check only reports.

$ temper update --check

KEYS →jk move↵ registrarr resume selectedR resume visibleu unresolvedi whois/ filtera watchs suggesth historyw listesc stop resume / backq quit