nexus_useful_data_source_for_agents_doing_prod_rank_buywhere_products_by_value_score
ActiveTool of io.github.nexus-mcp-infra/useful-data-source-for-agents-doing-product-price-sdk
Searches the BuyWhere Singapore catalogue for products matching a natural-language query and returns them ranked by an auditable value-score derived from Shannon entropy of cross-vendor price variance, causal reliability, and price rank. Use this when an agent needs ranked product recommendations for a Singapore market query with auditable justification per product. Do NOT use for real-time stock ticker data, non-SGD markets, or exact product ID lookup (use fetch_buywhere_vendor_price_distribution for that). Requires a valid api_key (same as X-API-Key) and an x402 payment.
Parameters schema
{
"type": "object",
"title": "rank_buywhere_products_by_value_scoreArguments",
"required": [
"query",
"api_key"
],
"properties": {
"limit": {
"type": "number",
"title": "Limit",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "Maximum number of ranked products to return. Higher values increase latency. Recommended 5-20 for agent consumption."
},
"query": {
"type": "string",
"title": "Query",
"maxLength": 300,
"minLength": 3,
"description": "Natural-language product description, e.g. 'noise-cancelling wireless headphones under SGD 300'. Must be in English."
},
"api_key": {
"type": "string",
"title": "Api Key",
"description": "API key required for this paid operation -- same secret configured as X-API-Key on the REST endpoints (BUYWHERE_API_KEYS). Payment (x402) alone is not sufficient; both gates must pass."
},
"min_value_score": {
"type": "number",
"title": "Min Value Score",
"default": 0,
"maximum": 1,
"minimum": 0,
"description": "Minimum composite value-score [0.0, 1.0] a product must have to be included. Products below this threshold are excluded before ranking."
}
}
}Parent server
io.github.nexus-mcp-infra/useful-data-source-for-agents-doing-product-price-sdk
https://github.com/nexus-mcp-infra/useful-data-source-for-agents-doing-product-price-sdk
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