# brandonyoungdev/tldx

Bulk domain availability checking via RDAP, DNS, and WHOIS, with prefix/suffix permutations, regex patterns, MCP, and multiple output formats

Repository: https://github.com/brandonyoungdev/tldx
Canonical: https://ross.abutalabs.com/products/tldx
Homepage: https://brandonyoung.dev/blog/introducing-tldx/
Language: Go
License: Apache-2.0
License Family: permissive
Topics: cli, developer-tools, domain, golang
Last push: 2026-08-25T04:21:23+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 97, longevity 61
- inputs: {"age_days": 861, "days_push": 8, "days_rel": 20, "gap_med": 3.5, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1915, forks 80 (observed 2026-08-28T04:05:53.708467+00:00)

## What it is
tldx is a fast Go CLI tool for brainstorming and checking domain name availability in bulk using RDAP, DNS, and WHOIS. It generates keyword permutations with prefixes, suffixes, and TLDs, supports regex patterns, multiple output formats, and includes an MCP server for AI agents.

## Use cases
- check if a domain name is available
- bulk check domain availability
- brainstorm domain names for a startup
- find available 3-letter domains
- generate domain name permutations with prefixes and suffixes
- find domains for sale
- check domain availability from the command line

## When to choose
- you need fast, concurrent bulk domain availability checks locally
- you want to generate many domain name permutations quickly
- you want an MCP server so AI agents can check domains
- you need machine-readable output like JSON or CSV for pipelines

## When to avoid
- you need a full domain registrar or purchase flow
- you need a GUI-based domain search experience
- you need guaranteed accurate WHOIS data for legal purposes, since RDAP coverage varies by TLD

## Facets
- artifact type: cli-tool
- maturity: active
- function: cli, developer-tools, search-engine, networking
- domain: developer-tools, web-development
- platform: cli, cross-platform, go
- tags: domain-availability, rdap, whois, dns, mcp-server, domain-name-generator, command-line

## Member repositories
- brandonyoungdev/tldx (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:53.708467+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:10:19.172399+00:00, confidence not recorded.
  - readme: https://github.com/brandonyoungdev/tldx (fetched 2026-08-28T04:05:53.708467+00:00, sha 8b32c976af09)
  - homepage: https://brandonyoung.dev/blog/introducing-tldx/ (fetched 2026-08-29T10:49:34.289069+00:00, sha 9915d09ab9a6)
  - site_page: https://brandonyoung.dev/about (fetched 2026-08-29T10:49:34.313830+00:00, sha fac2424f2552)
- Data as of 2026-08-30T08:39:29.467469+00:00.