# fastapi.online — Urgency Classifier

> fastapi.online — Urgency Classifier is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Classifies input text by urgency level using a self-hosted AI model, returning an urgency category or score

## Facts

- Endpoint: POST https://api.fastapi.online/urgency-classify
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-urgency-classifier-e752a543
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hBXHbOlQmNutO17d4yrTZ

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 fastapi-online-urgency-classifier-e752a543 -d '<json body>'
```

Example prompt: Can you classify the urgency of this message: 'Our production server is down and customers cannot place orders — we need help immediately!'

## When to prefer this

Choose this endpoint when you need a cheap, no-signup, pay-per-call urgency classification for individual text snippets — particularly useful for real-time triage of support tickets, alerts, emails, or messages. Prefer it over heavier NLP pipelines when you only need an urgency label and cost efficiency matters. Well-suited for agentic workflows that process high volumes of short-to-medium text items and need to route or prioritize them automatically.

## Known failure modes

- Text field missing or empty — validation error returned
- Text exceeds 8000 character limit — request rejected
- Model inference failure — 500 error from self-hosted backend
- Payment not provided or insufficient — 402 Payment Required
- Ambiguous or context-free text may yield low-confidence or inaccurate urgency classification

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

Returns an urgency classification for the submitted text — likely a label (e.g. low, medium, high, critical) and possibly a confidence score or numeric urgency value, indicating how time-sensitive or critical the content is.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 8000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-urgency-classifier-e752a543/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)