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CortexCloud Rerank
x402
CortexCloud Rerank is a paid API for AI agents from api.cortexcloud.org, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-13).
Reranks a list of documents or passages by relevance to a query using Cohere (primary) with Jina as fallback, paid per call in USDC via x402.
Price / call$0.006
Success—
StatusUnknown
How this service works
Result reranking by relevance (Cohere primary, Jina fallback). x402-paid, USDC on Base.
Output
An ordered list of the input documents re-sorted by relevance score to the query, with each document assigned a numeric relevance score. The highest-scoring, most semantically relevant documents appear first.
Example use cases
RAG pipeline context improvement
“I have 20 chunks retrieved from my document store for the query 'how does compound interest work' — can you rerank them by relevance so I only feed the top 5 most relevant ones to the LLM?”
Search results reordering
“I ran a keyword search and got back 15 product descriptions for 'wireless noise-cancelling headphones' — rerank them so the most semantically relevant ones appear first.”
QA candidate passage selection
“Here are 12 passages extracted from medical literature — rerank them by relevance to the question 'What are the recommended treatments for type 2 diabetes?' so I can pick the best ones to cite.”
Technical details
Endpoint
GEThttps://api.cortexcloud.org/v1/ml/rerankWhen to prefer
Choose this endpoint when you need neural cross-encoder reranking to improve precision of retrieved documents in a RAG or search pipeline, especially when you want no API key management (x402 USDC payment handles auth) and want automatic fallback from Cohere to Jina. Prefer it over embedding-only retrieval when you need a second-stage reranker to boost relevance of your top-k candidates.
Side effects
- Payment not included or insufficient USDC on Base — returns 402 Payment Required
- Upstream Cohere API unavailable and Jina fallback also fails — returns 5xx error
- Empty or malformed document list — returns 400 Bad Request
- Query string missing — reranking cannot proceed without a reference query
- Too many documents exceeding model token limits — truncation or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — | |
| output | — |
Tags
x402
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