curl -X POST https://console.trychert.com/api/v1/chats/$CHAT_ID/mark-read \
  -H "x-chert-tenant: $TENANT" \
  -H "x-chert-signature: v1,$TS,$SIG" \
  -H "content-type: application/json"

const ts = Math.floor(Date.now() / 1000)
const sig = crypto.createHmac("sha256", SIGNING_SECRET).update(`${ts}.`).digest("hex")
const res = await fetch(
  `https://console.trychert.com/api/v1/chats/${chatId}/mark-read`,
  {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "x-chert-tenant": TENANT_SLUG,
      "x-chert-signature": `v1,${ts},${sig}`,
    },
  },
)

import hmac, hashlib, time, requests
ts = int(time.time())
sig = hmac.new(SIGNING_SECRET.encode(), f"{ts}.".encode(), hashlib.sha256).hexdigest()
r = requests.post(
    f"https://console.trychert.com/api/v1/chats/{chat_id}/mark-read",
    headers={
        "Content-Type": "application/json",
        "x-chert-tenant": TENANT_SLUG,
        "x-chert-signature": f"v1,{ts},{sig}",
    },
)

{
  "chat_id": "0f2d3c1a-8b4e-4f6a-90d2-1a3b4c5d6e7f",
  "status": "read"
}