Quickstart

One key reaches all 39 endpoints and draws from your shared credit wallet. We store only a hash — you see the secret exactly once, right here.

POST /v1/sentiment is the cheapest real call (2 credits). Export your key as KYNTH_API_KEY and run any of these — if you just minted a key above, it's already substituted in.

curl https://api.kynth.studio/v1/sentiment \
  -H "Authorization: Bearer $KYNTH_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Love the product but support took days to reply.","aspects":["product","support"]}'

Every success carries your result plus usage (what it cost, what's left) and a requestId you can quote at us. Only successful calls are billed — a failure costs nothing.

{
  "sentiment": "neutral",
  "score": 0.1,
  "confidence": 0.88,
  "aspects": [
    {
      "aspect": "product",
      "sentiment": "positive",
      "score": 0.8
    },
    {
      "aspect": "support",
      "sentiment": "negative",
      "score": -0.6
    }
  ],
  "themes": [
    "slow support response"
  ],
  "usage": {
    "credits": 2,
    "balanceRemaining": 476
  }
}