get_reranking
Reranks documents by relevance to a search query using the ZeroEntropy Zerank API, helping AI assistants prioritize the most pertinent information for users.
Instructions
Get the reranked document listing
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| query | Yes | The search query | |
| documents | Yes | Array of documents to rerank | |
| api_key | Yes | API key for authentication |
Implementation Reference
- rerank.py:33-82 (handler)Standalone Python implementation of the get_reranking MCP tool handler using FastMCP. Calls ZeroRank API for reranking.
async def get_reranking(request: RerankRequest) -> RerankResponse: """Get the reranked document listing Args: request: The RerankRequest object containing query, documents, and api_key Returns: The RerankResponse object containing the reranked document listing """ headers = { "Authorization": f"Bearer {request.api_key}", "Content-Type": "application/json", } async with httpx.AsyncClient() as client: try: response = await client.post( ZERANK_API_BASE, json={ "query": request.query, "documents": request.documents, }, headers=headers, ) response.raise_for_status() result = response.json() if "results" not in result: raise ValueError("Invalid API response format") return RerankResponse( results=[RerankResult(**result) for result in result["results"]] ) except httpx.HTTPStatusError as e: if e.response.status_code == 401: raise ValueError("Invalid API key") elif e.response.status_code == 429: raise ValueError("Rate limit exceeded") else: raise ValueError(f"API error: {e.response.status_code}") except httpx.TimeoutException: raise ValueError("Request timed out") except httpx.RequestError as e: raise ValueError(f"Request error: {str(e)}") except Exception as e: raise ValueError(f"Reranking failed: {str(e)}") - main.py:18-67 (handler)Python handler for get_reranking tool defined within FastMCPServer DurableObject class for Cloudflare Workers.
async def get_reranking(request: RerankRequest) -> RerankResponse: """Get the reranked document listing Args: request: The RerankRequest object containing query, documents, and api_key Returns: The RerankResponse object containing the reranked document listing """ headers = { "Authorization": f"Bearer {request.api_key}", "Content-Type": "application/json", } async with httpx.AsyncClient() as client: try: response = await client.post( ZERANK_API_BASE, json={ "query": request.query, "documents": request.documents, }, headers=headers, ) response.raise_for_status() result = response.json() if "results" not in result: raise ValueError("Invalid API response format") return RerankResponse( results=[RerankResult(**result) for result in result["results"]] ) except httpx.HTTPStatusError as e: if e.response.status_code == 401: raise ValueError("Invalid API key") elif e.response.status_code == 429: raise ValueError("Rate limit exceeded") else: raise ValueError(f"API error: {e.response.status_code}") except httpx.TimeoutException: raise ValueError("Request timed out") except httpx.RequestError as e: raise ValueError(f"Request error: {str(e)}") except Exception as e: raise ValueError(f"Reranking failed: {str(e)}") - index.js:135-166 (handler)JavaScript handler logic within CallToolRequestSchema handler for the get_reranking tool in stdio MCP server.
if (name === "get_reranking") { try { // Validate input const validatedArgs = RerankRequestSchema.parse(args); // Make API request const response = await makeRerankRequest( validatedArgs.query, validatedArgs.documents, validatedArgs.api_key ); return { content: [ { type: "text", text: JSON.stringify(response, null, 2), }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error: ${error.message}`, }, ], isError: true, }; } } - worker.js:150-179 (handler)JavaScript handler logic within callTool method for the get_reranking tool in Cloudflare Worker Durable Object.
if (name === "get_reranking") { try { // Validate input const validatedArgs = RerankRequestSchema.parse(args); // Make API request const response = await this.makeRerankRequest( validatedArgs.query, validatedArgs.documents, validatedArgs.api_key ); return new Response(JSON.stringify({ jsonrpc: "2.0", id: id, result: { content: [ { type: "text", text: JSON.stringify(response, null, 2), }, ], }, }), { headers: { "Content-Type": "application/json" }, }); } catch (error) { return this.createErrorResponse(error.message, id, MCP_ERROR_CODES.INVALID_PARAMS); } } - index.js:94-129 (registration)Registration of the get_reranking tool in the list tools handler for the JS MCP server.
server.setRequestHandler(ListToolsRequestSchema, async () => { return { tools: [ { name: "get_reranking", description: "Get the reranked document listing", inputSchema: { type: "object", properties: { query: { type: "string", description: "The search query", minLength: 1, maxLength: 10000, }, documents: { type: "array", description: "Array of documents to rerank", items: { type: "string", }, minItems: 1, maxItems: 1000, }, api_key: { type: "string", description: "API key for authentication", minLength: 1, }, }, required: ["query", "documents", "api_key"], }, }, ], }; });