{"domain":"useful-data-source-for-agents-production.up.railway.app","count":1,"changes":[{"captured_at":"2026-07-27T03:00:45","card_hash":"edc3b38ca1e9d9c505a7f83ccc2b433f9902867a70e70a00e9765d7349b41bf5","previous_card_hash":null,"diff":{"skills_added":[{"id":"nexus_useful_data_source_for_agents_doing_prod_fetch_buywhere_vendor_price_distribution","name":"Fetch Vendor Price Distribution for SKU","description":"Given a BuyWhere product identifier, returns the full cross-vendor price distribution in SGD along with the Shannon entropy of that distribution and the coefficient of variation. Do NOT use as a discovery tool -- requires a known BuyWhere product_id from rank_buywhere_products_by_value_score. Requires a valid api_key (same as X-API-Key) and an x402 payment.","tags":["price-distribution","entropy"],"inputModes":null,"outputModes":null},{"id":"nexus_useful_data_source_for_agents_doing_prod_rank_buywhere_products_by_value_score","name":"Rank BuyWhere Products by Value Score","description":"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. Do NOT use for real-time stock ticker data, non-SGD markets, or exact product ID lookup. Requires a valid api_key (same as X-API-Key) and an x402 payment.","tags":["product-search","price-comparison","singapore-ecommerce"],"inputModes":null,"outputModes":null}],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"name","before":null,"after":"BuyWhere Singapore Value Intelligence API"},{"field":"description","before":null,"after":"Semantic product search over Singapore e-commerce with auditable value-scores derived from Shannon entropy across vendor price distributions."},{"field":"version","before":null,"after":"1.0.0"},{"field":"url","before":null,"after":"https://useful-data-source-for-agents-production.up.railway.app"},{"field":"documentationUrl","before":null,"after":"https://useful-data-source-for-agents-production.up.railway.app/docs"}],"other_changed":true,"is_empty":false,"human_summary":"added 2 skills · name ∅ → BuyWhere Singapore Value Intelligence AP · description ∅ → Semantic product search over Singapore e · version ∅ → 1.0.0 · url ∅ → https://useful-data-source-for-agents-pr · documentationUrl ∅ → https://useful-data-source-for-agents-pr"}}]}