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Synapse NER – Named Entity Recognition
x402
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
Price / call$0.002
Success—
StatusUnknown
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"]}
Example use cases
Entity extraction from news article
“Pull out all the people, organizations, locations, and dates mentioned in this news snippet: 'On March 5, 2023, the United Nations met with Angela Merkel in Berlin to discuss the climate accord.'”
Contract date and party identification
“I have this contract clause — can you find every date, person name, and organization mentioned in it? The clause reads: 'On January 1 2024, Acme Corp and John Doe agreed to terms in New York.'”
Research document entity tagging
“Extract all named entities from this research summary so I can build a knowledge graph: 'Dr. Smith at MIT published findings in 2022 about trials conducted in Nairobi with support from WHO.'”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/ner?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"dates": [
"2020"
],
"places": [
"Nairobi"
],
"persons": [
"Maria"
],
"organizations": [
"Caritas"
]
}
}Tags
x402
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