# Combify Compute Sentiment Classifier

> Combify Compute Sentiment Classifier is a paid API for AI agents from compute.combify.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).

Classifies input text as POSITIVE or NEGATIVE with confidence scores using DistilBERT SST-2, priced at $0.005 USDC per call

## Facts

- Endpoint: POST https://compute.combify.app/classify?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/combify-compute-sentiment-classifier-cca5a00a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iP0eGnFLr3OMMIXdVK7HW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability combify-compute-sentiment-classifier-cca5a00a -d '<json body>'
```

Example prompt: Can you classify this customer review as positive or negative and tell me how confident you are: 'The onboarding was painless but the dashboard is confusing and slow'?

## When to prefer this

Choose this endpoint when you need a fast, cheap, binary sentiment signal (POSITIVE/NEGATIVE) with a calibrated confidence score for short-to-medium text. It is ideal for triage pipelines, review scoring, comment filtering, or any workflow where volume is high and a two-class label suffices. Prefer /chat for nuanced moderation, open-ended questions, or multi-class classification needs. At $0.005 USDC per call it is the lowest-cost option on the platform for opinion detection.

## Known failure modes

- HTTP 402 if payment is not attached or fails — call is not charged on failure
- Text exceeding 2000 characters may be rejected or truncated
- Network timeout for unusually complex inputs
- Invalid JSON body returns a 400-level error
- Model is binary only — nuanced or neutral sentiment cannot be expressed

## How this service works

Quick opinion triage: labels text POSITIVE or NEGATIVE with confidence plus all scores (DistilBERT SST-2), fixed price $0.005 USDC. Use this for sentiment only, not nuanced moderation or answers (use /chat). POST JSON body {text (required, max 2000 chars)}. Returns {label, score, scores}. Unpaid calls get 402; paid calls settle only on success.

## Output

Returns a JSON object with: `label` (string, either 'POSITIVE' or 'NEGATIVE'), `score` (float 0–1, confidence for the winning label), and `scores` (object with confidence values for all classes). On unpaid or failed calls, returns HTTP 402.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Text to classify, max 2000 chars"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/combify-compute-sentiment-classifier-cca5a00a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from compute.combify.app](https://www.zero.xyz/host/compute.combify.app/llms.txt)