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klymax402 Vector Search API
x402
klymax402 Vector Search API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).
Performs semantic vector search over a provided or session-stored set of text documents, returning the top-K most relevant results for a given query.
Price / call$0.012
Success—
StatusUnknown
How this service works
One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.
Output
Returns an ordered list of the top-K most semantically similar documents (or document chunks) from the indexed set, along with relevance/similarity scores, matched text content, and their position in the original document array.
Example use cases
API catalog semantic search
“I have a list of 50 API descriptions — can you search them for the ones most relevant to 'send an email notification' and return the top 3 matches?”
Knowledge base retrieval for chatbot
“Search through the 20 FAQ entries I stored earlier in the 'support' namespace and find the 5 most relevant ones to the user's question: 'how do I reset my password?'”
Research document similarity lookup
“Here are 10 research paper abstracts — find the top 3 that are most semantically similar to the topic 'machine learning for climate prediction' in my 'research' namespace.”
Technical details
Endpoint
GEThttps://klymax402.com/api/vector-search/api/searchWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call semantic vector search without setting up a dedicated vector database or managing API keys. It is well-suited for session-scoped document retrieval tasks where you want to index a small-to-medium corpus on the fly and query it immediately. Prefer it over full-featured vector DBs (Pinecone, Weaviate) when you want zero infrastructure overhead and are already operating within the klymax402 x402 payment ecosystem.
Side effects
- No documents provided and no session-stored documents found for the namespace — returns empty results or an error
- topK exceeds the maximum of 10 — capped or returns an error
- Query string is empty or missing — returns a validation error
- Payment not received or insufficient USDC balance — returns HTTP 402
- Namespace not found or misspelled — returns empty result set
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| topK | number | Number of top results to return (default: 3, max: 10) |
| query | string | The text query to search for |
| documents | array | Array of text documents to index (optional if already stored in this session) |
| namespace | string | Namespace to isolate document sets (default: 'default') |
Tags
x402
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