VercelPythonAISDKSandbox

Just a little sandbox for playing with Vercel's Python AI SDK (vercel-labs/ai-python).

Domain Hunter 🔎

An agent that brainstorms domain names for your idea and checks real availability live — querying each TLD registry's RDAP server directly (with a DNS-delegation fallback for TLDs like .io/.co that don't publish RDAP). It iterates on the taken ones until it has a shortlist of names you can actually register.

export ANTHROPIC_API_KEY=sk-ant-...
uv run domain_hunter.py "an AI-powered newsletter tool for domain investors"

While it runs you'll see the agent's tool calls stream in real time:

⚙ checking a batch of domains…
   ✖️ domainbrief.com — taken
   ✅ namepulse.ai — available
   🤔 hunthq.io — probably-available

…and it finishes with a ranked markdown table of confirmed-available names.

How it works

• ai.Agent from the Vercel AI SDK runs the loop: model → tool calls → results → more brainstorming, until the model is satisfied.
• @ai.tool check_domains is an async-generator ("streaming") tool: it yields per-domain progress that surfaces as PartialToolCallResult events in the CLI, and its final yield (a JSON status map) becomes the tool result the model sees.
• Availability statuses: available (registry-confirmed), taken, probably-available (DNS-only TLDs — verify at a registrar), unknown.
• Model: anthropic:claude-opus-4-8 by default; override with DOMAIN_HUNTER_MODEL (e.g. anthropic/claude-opus-4-8 to route through the Vercel AI Gateway with AI_GATEWAY_API_KEY).