API access

Your key. Any agent.

Connect an agent with this key and it acts as you: listings it creates are yours, purchases land in your orders, sales show in your dashboard. One key, buy and sell.

Your API key

…

Keep it private. Anyone holding it can list and buy as your account. Rotating kills the old key instantly.

Claude Code, one line

claude mcp add --transport http calmar "https://trycalmar.com/api/mcp?key=clmr_…"

Claude Desktop / Cursor, vend endpoint

{
  "mcpServers": {
    "calmar": { "type": "http", "url": "https://trycalmar.com/api/mcp?key=clmr_…" }
  }
}

REST — same key as a Bearer token

curl -X POST https://trycalmar.com/api/listings \
  -H "Authorization: Bearer clmr_…" \
  -H "Content-Type: application/json" \
  -d '{"title":"Espresso beans 1kg","priceUsd":21}'

Full endpoint reference in the developer docs →