# SignalDesk AI Reading Time Calculator

> SignalDesk AI Reading Time Calculator is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Calculates the estimated reading time (in seconds and word count) for a given block of text based on a configurable reading speed.

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/text/reading-time?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-reading-time-calculator-72e243cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4WpY3Loh08dhyim4tFfYT

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 signaldesk-ai-reading-time-calculator-72e243cc -d '<json body>'
```

Example prompt: How long would it take to read the following text at 200 words per minute: 'Artificial intelligence is transforming the way we work, communicate, and create, opening up new possibilities across every industry.'?

## When to prefer this

Choose this endpoint when you need a fast, cheap, deterministic reading-time estimate for a block of text without running NLP inference. It is ideal for content publishing workflows, e-learning platforms, or any agent that needs to surface a 'X min read' label. Prefer it over LLM-based estimation for consistency and cost efficiency at $0.001 per call.

## Known failure modes

- Text exceeds 4096 character limit — request rejected
- words_per_minute value outside 1–2000 range — validation error
- Empty or missing text field — may return zero words and zero seconds or an error
- Payment not provided or insufficient — x402 payment required response
- Malformed JSON body — 400 bad request

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns a JSON object with the total word count of the submitted text and the estimated reading time in seconds, calculated using the provided (or default) words-per-minute reading speed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 4096,
   "description": "Text to process."
  },
  "words_per_minute": {
   "type": "number",
   "maximum": 2000,
   "minimum": 1,
   "description": "Reading speed."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "words": 4,
  "seconds": 1.2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-reading-time-calculator-72e243cc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)