# agentx.sale AI Keyword Extraction

> agentx.sale AI Keyword Extraction is a paid API for AI agents from agentx.sale, paid per call via x402, $0.9/call, status unknown (last checked 2026-10-21).

Extracts top salient keywords and key phrases with relevance scores from supplied text, and detects the language.

## Facts

- Endpoint: POST https://agentx.sale/x402/keywords?utm_source=zero.xyz
- Price: $0.9/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentx-sale-ai-keyword-extraction-b4e02062
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bCz8y16vCEvdEHh3YGtu7

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 agentx-sale-ai-keyword-extraction-b4e02062 -d '<json body>'
```

Example prompt: Pull the top 10 keywords and key phrases from this article text, ranked by relevance, and tell me what language it's in: 'Artificial intelligence is transforming industries from healthcare to finance, enabling automation, predictive analytics, and smarter decision-making at scale.'

## When to prefer this

Choose this endpoint when you need fast, scored keyword and key phrase extraction from arbitrary text with automatic language detection, especially within agentic workflows that require paid-per-call access via the x402 protocol. It is well-suited for content tagging, SEO analysis, document summarization support, or routing decisions based on text topics. Prefer this over a full topic classification endpoint when you need ranked term-level granularity rather than category labels.

## Known failure modes

- Text exceeds 24,000 character limit — request rejected
- Empty or missing text field — validation error
- maxKeywords value out of expected range — may be ignored or clamped
- Non-text binary content submitted — poor or empty results
- Network timeout or upstream AI model failure — 5xx error

## How this service works

AI keyword extraction from supplied text: top salient keywords and key phrases with scores, language detected. POST JSON {text, maxKeywords?} (max 24k chars)

## Output

Returns a ranked list of the most salient keywords and key phrases found in the input text, each with a relevance score, plus the detected language of the text. The number of keywords returned is bounded by the optional maxKeywords parameter (default behavior applies if omitted).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  },
  "maxKeywords": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "keywords": [
   "renewable energy",
   "solar"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentx-sale-ai-keyword-extraction-b4e02062/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentx.sale](https://www.zero.xyz/host/agentx.sale/llms.txt)