# fastapi.online — Named Entity Recognition (NER) Endpoint

> fastapi.online — Named Entity Recognition (NER) Endpoint is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status down (last checked 2026-10-20).

Extracts named entities (people, places, organizations, etc.) from a given text string, returning a structured array of identified entities.

## Facts

- Endpoint: POST https://api.fastapi.online/entities?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-named-entity-recognition-ner-endpoint-f0cd3754
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IBOytrDyXxMg9yYgnjEyP

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-named-entity-recognition-ner-endpoint-f0cd3754 -d '<json body>'
```

Example prompt: Can you pull out all the named entities — people, organizations, and locations — from this paragraph: 'Apple CEO Tim Cook met with President Biden in Washington D.C. last Tuesday to discuss supply chain policy.'

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call named entity recognition without signing up for a managed NLP provider. It is well-suited for agent pipelines that process occasional text snippets and want to pay in USDC crypto with no subscription commitment. Prefer alternatives like spaCy, AWS Comprehend, or Google Natural Language API if you need SLA guarantees, high-volume throughput, or richer entity metadata.

## Known failure modes

- Missing 'text' field in request body returns a validation error
- Empty string input may return an empty entities array
- Very long text inputs may time out or truncate
- Ambiguous entity mentions may be missed or misclassified
- Payment not included or insufficient USDC causes 402 Payment Required
- Model may not support all languages equally well

## 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 a JSON object containing an 'entities' array. Each element in the array represents a detected named entity extracted from the input text, likely including the entity string and its type (person, organization, location, etc.), though exact sub-fields may vary with the self-hosted model in use.

## 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-named-entity-recognition-ner-endpoint-f0cd3754/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)