# AgentRXI Sentiment & Tone Classifier

> AgentRXI Sentiment & Tone Classifier is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).

Classifies up to 20 texts per call into positive, negative, or neutral sentiment with a confidence score and a one-line reason for each result.

## Facts

- Endpoint: GET https://agentrxi.com/v1/sentiment?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-sentiment-tone-classifier-bd4ac2ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VBiaf-jbJumIRnGaiw77F

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 agentrxi-sentiment-tone-classifier-bd4ac2ff
```

Example prompt: Can you classify the sentiment of these three customer reviews and tell me how confident you are for each one: 'Absolutely loved it!' | 'It was okay, nothing special' | 'Terrible experience, never coming back'?

## When to prefer this

Choose this endpoint when you need fast, per-call sentiment classification with a confidence score and human-readable reason, especially in a pay-per-call context with no subscription overhead. Supports batch processing of up to 20 texts per call, making it efficient for small-to-medium batch jobs. Prefer it over heavier NLP pipelines when you need quick tone detection without setting up your own model infrastructure.

## Known failure modes

- Missing required 'texts' query parameter returns an error
- Submitting more than 20 texts in a single call may be rejected or truncated
- Malformed pipe-separated input may cause parse errors
- Empty string inputs may return low-confidence or error results
- Payment failure (insufficient USDC) results in 402 response blocking the call

## How this service works

Sentiment and tone classification for text (positive / negative / neutral with confidence, plus a one-line reason). Batch up to 20 texts per call. Also callable as GET with the same fields as query parameters.

## Output

Returns a sentiment label (positive, negative, or neutral), a confidence score (0–1), and a brief one-line reason for each input text submitted in the batch.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "texts"
     ],
     "properties": {
      "texts": {
       "type": "string",
       "description": "1 to 20 texts; separate items with |"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentrxi-sentiment-tone-classifier-bd4ac2ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)