# Synapse NER – Named Entity Recognition

> Synapse NER – Named Entity Recognition is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Extracts named entities (dates, places, persons, organizations) from input text via a pay-per-call API using x402/USDC payments

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/ner?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-ner-named-entity-recognition-f48224fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CpzqR9FXS1-Of8MBuLnV3

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 synapse-ner-named-entity-recognition-f48224fe
```

Example prompt: Can you extract all the named entities — people, places, organizations, and dates — from this text: 'In 2020, Maria from Caritas visited Nairobi to coordinate relief efforts'?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call named entity recognition without API keys or account setup. It is ideal for ad-hoc NLP tasks where you want to identify people, places, organizations, and dates in unstructured text and only pay per request in USDC via x402. Prefer it over hosted NLP platforms when you want no-signup access and micropayment billing on Base.

## Known failure modes

- Missing required 'input' field returns a validation error
- Invalid HTTP method (other than GET/HEAD/DELETE) causes request rejection
- Empty or missing text results in empty entity arrays
- Payment failure via x402 returns HTTP 402 before processing
- Malformed request body returns 400 Bad Request
- Very long texts may time out or return partial results

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

A JSON object with four arrays — dates, places, persons, and organizations — each containing entity strings extracted from the input text. Example: {"dates":["2020"],"places":["Nairobi"],"persons":["Maria"],"organizations":["Caritas"]}

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "dates": [
   "2020"
  ],
  "places": [
   "Nairobi"
  ],
  "persons": [
   "Maria"
  ],
  "organizations": [
   "Caritas"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-ner-named-entity-recognition-f48224fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)