Communication ↗
Sentiment
Turn a review or support message into a sentiment score, per-aspect breakdown, and the themes driving it.
POST /v1/sentiment$0.02/call · 2 credits, charged only on success
Send this
{
"text": "Love the product but support took days to reply.",
"aspects": [
"product",
"support"
]
}Every response carries usage — the credits burned and your remaining balance. A failed call never burns credits.
Try it live against your own key in the interactive reference; every account gets 500 free credits a month, no card.
Get this back
{
"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
}
}Four ways in. Same $0.02/call.
curl
curl https://api.kynth.studio/v1/sentiment \
-H "Authorization: Bearer ksk_live_…" \
-H "Content-Type: application/json" \
-d '{"text":"Love the product but support took days to reply.","aspects":["product","support"]}'TypeScript
import { KynthCore } from "@kynth/api";
const kynth = new KynthCore({ apiKey: process.env.KYNTH_API_KEY! });
const result = await kynth.sentiment({
"text": "Love the product but support took days to reply.",
"aspects": [
"product",
"support"
]
});Python
from kynth import Kynth
client = Kynth(api_key=os.environ["KYNTH_API_KEY"])
result = client.sentiment(
text="Love the product but support took days to reply.",
aspects=[
"product",
"support"
],
)MCP
// One-time setup in your MCP client (Claude, Cursor, …):
{ "mcpServers": { "kynth-core": {
"command": "npx", "args": ["@kynth/api-mcp"],
"env": { "KYNTH_API_KEY": "ksk_live_…" } } } }
// Then the agent just calls the kynth_sentiment tool.More from communication
Summarize
$0.03/call
A meeting transcript, thread, or report → a tight summary, key points, and extracted action items.
Reply drafting
$0.05/reply
A customer thread plus your context → a ready-to-send reply in the right tone, with an internal note for the agent.
Ticket triage
$0.03/ticket
A support ticket → priority, category, the team it belongs to, sentiment, SLA risk, and a suggested first response.