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AmanChain Keyword & Entity Extraction
x402
AmanChain Keyword & Entity Extraction is a paid API for AI agents from amanchain-relay.gitajhd.workers.dev, paid per call via x402, $0.002488/call, status unknown (last checked 2026-09-14).
Extracts keywords, named entities, and topics from a given text input, paid per call via x402 in USDC on Base.
Price / call$0.002488
Success—
StatusUnknown
How this service works
Keyword and entity extraction API — topics, named entities and key phrases from any text; NLP enrichment. Deterministic on-chain execution by the AmanChain node — live consensus state, real blocks, pools and balances. Pay per call via x402 (USDC on Base), no account, no API key. POST JSON {"serviceId":"aman-keywords","request":"<input>"}.
Output
Returns a structured list of extracted keywords, named entities (such as people, organizations, locations, and other proper nouns), and topic categories identified within the provided input text.
Example use cases
News article entity tagging
“Extract all the keywords, entities, and topics from this news snippet so I can tag it in my CMS: 'The Federal Reserve raised interest rates by 25 basis points on Thursday, citing persistent inflation concerns from Fed Chair Jerome Powell.'”
SEO keyword discovery from blog post
“Can you pull out the main keywords and topics from this blog intro so I know what terms to target for SEO? Here's the text: 'Electric vehicles are transforming the automotive industry, with Tesla, Rivian, and GM racing to dominate the EV market in North America.'”
Research paper entity extraction
“I have this abstract from a research paper — extract all the key entities and topics from it: 'A novel mRNA vaccine developed by BioNTech demonstrated 94% efficacy against influenza A in a Phase 3 clinical trial conducted across 12 European countries.'”
Technical details
Endpoint
POSThttps://amanchain-relay.gitajhd.workers.dev/api/x402/aman-keywordsWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call NLP keyword and entity extraction without account setup or API keys, and are already operating in a Web3/x402 payment context with USDC on Base. It is well-suited for agents that process text on demand and need named entity recognition (NER) and topic tagging in a single call.
Side effects
- Empty or very short input text may yield sparse or empty results
- Payment failure via x402 if insufficient USDC balance on Base
- Malformed JSON body (missing 'serviceId' or 'request' field) returns an error
- Non-English or low-resource language text may produce lower quality extractions
- Rate limiting or node unavailability may cause timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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