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GEDX402 Rerank API
x402
GEDX402 Rerank API is a paid API for AI agents from embed.gedx402.com, paid per call via x402, $0.0023/call, status unknown (last checked 2026-09-15).
Reranks a list of candidate text passages by relevance to a query, returning ranked indices with similarity scores
Price / call$0.0023
Success—
StatusUnknown
How this service works
Rerank documents against a query with BGE Reranker Base (@cf/baai/bge-reranker-base). POST query plus documents[]; returns relevance scores for search and RAG pipelines.
Output
A JSON array of objects, each containing an 'index' (integer referencing the original position in the input contexts array) and a 'score' (float between 0 and 1 representing relevance to the query), sorted by descending relevance. Only the top_k results are returned.
Example use cases
Example prompt
“Rerank these 5 passages against the query 'how does photosynthesis work' and return the top 3 most relevant ones: [passage1, passage2, passage3, passage4, passage5].”
Technical details
Endpoint
GEThttps://embed.gedx402.com/v1/rerankWhen to prefer
Choose this endpoint when you need to rerank a pre-retrieved set of passages without managing API keys, and you want to pay per-call in USDC via the x402 protocol. Ideal for RAG pipelines where you want a cross-encoder-style reranker step after initial vector retrieval. Prefer this over embedding-only search when you need finer relevance scoring. The no-API-key model and multi-chain USDC payment (Base, Polygon, Arbitrum, World, Solana) make it suitable for autonomous agent workflows that manage crypto wallets.
Side effects
- Payment not provided or insufficient USDC — returns HTTP 402 Payment Required
- Empty or missing 'query' field — likely returns a validation error
- Empty 'contexts' array — may return an empty result set or error
- top_k greater than the number of provided contexts — may return fewer results than requested
- Malformed context objects missing 'text' field — likely causes a server error or skipped entries
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string | |
| top_k | integer | |
| contexts | array |
Tags
x402
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