DistilBERT fine-tuned on SST-2, running on Cloudflare Workers AI, so text is not sent to any third-party provider.

What does a result look like?

A label, positive or negative, with a confidence score from 0 to 1. Treat scores near 0.5 as neutral or uncertain.

Which languages work?

The model is trained on English. Other languages return a result but with lower reliability; translate first with the Translation API for best accuracy.

Is there a neutral class?

No. The model is binary. Use the confidence score to decide when to call something neutral.

What does a call cost?

10 tokens. The free plan covers 50 classifications a month.

AIMAINTAINED10 tokens / call

Sentiment Analysis API

Positive or negative with a confidence score for any text, from a model that runs on the platform

Classify any text as positive or negative with a confidence score, using a DistilBERT model that runs on the platform. Send a short string with GET or a longer body with POST. No third-party keys and nothing leaves the platform.

Every call needs an X-Api-Key header. A free key includes 500 tokens a month, no card required. 10 tokens per call, so the free plan covers about 50 calls a month.

Start free — 500 tokens / mo →See all plans

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response.json

{
  "text": "I love this product",
  "sentiment": "positive",
  "confidence": 0.9999,
  "scores": [
    {
      "score": 0.000121056436910294,
      "label": "NEGATIVE"
    },
    {
      "score": 0.9998788833618164,
      "label": "POSITIVE"
    }
  ]
}

Production Ready: Battle-tested infrastructure with a 99.9% uptime SLA. Rate limits are generous, responses are consistent.
Simple Integration: Standard REST + JSON. Works with any HTTP client. Copy-ready code snippets in 4 languages.
One Key, 125+ APIs: Your DataAndAPIs subscription unlocks every API on the platform — anime, finance, sports, and more.

Use cases for Sentiment Analysis API

Score reviews, survey answers and support tickets to route the unhappy ones first.
Track sentiment of social mentions or comments over time on a dashboard.
Sort user feedback by tone before a human reads it.
Add a sentiment field to records in a data pipeline with one call per text.

Sentiment Analysis API endpoints

Every endpoint with its parameters and a real example response.

OpenAPI definition Postman workspace

GETAnalyze Sentiment
POSTAnalyze Sentiment (POST)

GETAnalyze Sentiment

https://api-sentiment.dataandapis.com/v1/sentiment

Query parameters

Parameter	Example
text	I love this product	Required

Example request

curl "https://api-sentiment.dataandapis.com/v1/sentiment?text=I%20love%20this%20product" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "text": "I love this product",
  "sentiment": "positive",
  "confidence": 0.9998,
  "scores": [
    {
      "label": "POSITIVE",
      "score": 0.9998
    },
    {
      "label": "NEGATIVE",
      "score": 0.0002
    }
  ]
}

POSTAnalyze Sentiment (POST)

https://api-sentiment.dataandapis.com/v1/sentiment

Request body

{
  "text": "I love this product"
}

Example request

curl -X POST "https://api-sentiment.dataandapis.com/v1/sentiment" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "text": "I love this product" }'

Example response

{
  "text": "I love this product",
  "sentiment": "positive",
  "confidence": 0.9999,
  "scores": [
    {
      "score": 0.000121056436910294,
      "label": "NEGATIVE"
    },
    {
      "score": 0.9998788833618164,
      "label": "POSITIVE"
    }
  ]
}

Where the data comes from

Source: Cloudflare Workers AI sentiment classifier (DistilBERT SST-2). No stored dataset.
Freshness: Inference runs live on every call.

One install. Every endpoint.

No proprietary SDKs needed. Any HTTP client works. Pick your language and paste.

3languages

2endpoints

RESTarchitecture

1key for all APIs

Fully typed responses — auto-completion in your IDE
Tracks the API in lockstep — new endpoints land same day
One key works across 125+ APIs on the platform

import axios from 'axios';

const { data } = await axios.get(
  'https://api-sentiment.dataandapis.com/v1/sentiment',
  { headers: { 'X-Api-Key': process.env.API_KEY } }
);

Sentiment Analysis API · X-Api-Key

Explore the endpoints

Browse request parameters and inspect live example responses.

Available Endpoints

Request Parameters

API URL

Headers

X-Api-Key

Query Parameters

text(Required)

Target:

Client:

import axios from 'axios';

const url = 'https://api-sentiment.dataandapis.com/v1/sentiment';
const { data } = await axios.get(url, {
  headers: { 'X-Api-Key': 'YOUR_API_KEY' }
});