{"series":"checks","title":"Weekly checks","cadence":"weekly","version":1,"description":"From each published weekly report: listings checked that week and how many failed their latest check that week, plus MCP server numbers.","license":"https://creativecommons.org/licenses/by/4.0/","citation":"ToolVet (2026). x402 and MCP directory history [Data set]. https://toolvet.app/data. Licensed under CC BY 4.0.","source":"https://toolvet.app/data","columns":[{"name":"week","type":"string","description":"ISO week of the published weekly report, in the site's lowercase form, e.g. 2026-w42."},{"name":"week_start","type":"date","description":"First day of the week (Monday, UTC)."},{"name":"last_day","type":"date","description":"Last day of the week (Sunday, UTC)."},{"name":"checked","type":"integer","description":"Public listings checked at least once that week."},{"name":"failing","type":"integer","description":"Of those, listings whose latest check that week failed."},{"name":"checks_run","type":"integer","description":"Every check made that week."},{"name":"mcp_checked","type":"integer","description":"Remote MCP servers checked that week."},{"name":"mcp_answering","type":"integer","description":"MCP servers that answered (a login or payment request counts as answering)."},{"name":"mcp_median_tools","type":"number","description":"Median number of tools, over answering servers that listed their tools; empty when none did."}],"rows":[]}