# Arch Tools Sentiment Analysis

> Arch Tools Sentiment Analysis is a paid API for AI agents from archtools.dev, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-14).

Analyzes the sentiment of a given text string and returns a structured sentiment result

## Facts

- Endpoint: POST https://archtools.dev/v1/tools/sentiment-analysis
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arch-tools-sentiment-analysis-5fc0fe86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gpwExIkCXLbfSGu9WYBDz

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 arch-tools-sentiment-analysis-5fc0fe86 -d '<json body>'
```

Example prompt: Can you analyze the sentiment of this customer review: 'The product quality was outstanding but the shipping took way too long and customer support was unhelpful' — tell me whether it's positive, negative, or mixed?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call sentiment classification on arbitrary text without managing your own NLP infrastructure. It is well-suited for agent workflows that process reviews, social posts, or support messages on demand. Prefer it over general LLM-based sentiment prompting when you want a consistent, structured JSON output with defined sentiment labels rather than free-form text responses.

## Known failure modes

- Empty or missing 'text' field returns a 400 validation error
- Extremely long text inputs may be truncated or rejected
- Ambiguous or very short text may return low-confidence results
- Payment failure or insufficient USDC balance returns a 402 error
- Non-English text may produce less accurate results if not supported

## How this service works

Arch Tools — sentiment-analysis

## Output

A JSON object containing the sentiment classification (e.g. positive, negative, neutral, or mixed) of the input text, likely with a confidence score or polarity value indicating the strength and direction of the detected sentiment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Text to analyze"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arch-tools-sentiment-analysis-5fc0fe86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from archtools.dev](https://www.zero.xyz/host/archtools.dev/llms.txt)