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Pass the place (a merchant such as Grab or Shopee, a category such as dining or supermarket, or a city such as Tokyo, or both: 'dining in Tokyo') and the cards they hold (names or ids). It answers in one line, 'use card X here, because Y, up to cap Z', with the second-best card, each card's cap and conditions, and the bank source link, plus the dated bank and card-network offers live at that place for those cards today. The data pack covers Vietnam-issued cards; amounts are in VND.","inputSchema":{"type":"object","properties":{"place":{"type":"string","minLength":1,"maxLength":120,"description":"Merchant, category or city, for example 'Grab', 'supermarket', 'dining in Tokyo'."},"cards":{"type":"array","minItems":1,"maxItems":20,"items":{"type":"string","maxLength":80},"description":"The cards the person holds, by name ('VPBank Z JCB') or id ('vpbank-z-jcb')."},"amount":{"type":"number","exclusiveMinimum":0,"description":"Purchase amount, in VND unless currency says otherwise. Default 1,000,000 VND."},"currency":{"type":"string","pattern":"^[A-Z]{3}$","description":"ISO code of amount when the person gives a foreign amount, such as JPY for 8,000 yen. The tool converts at its own dated rate; do not convert yourself."},"date":{"type":"string","pattern":"^\\d{4}-\\d{2}-\\d{2}$","description":"Purchase date YYYY-MM-DD. Default today in Vietnam."},"channel":{"type":"string","enum":["online","pos"],"description":"Online or in a shop, when the place alone does not say."},"statement_spend":{"type":"object","additionalProperties":{"type":"number"},"description":"Spend so far this statement by card id, for minimum spend and tiers."},"picks":{"type":"object","additionalProperties":{"type":"array","items":{"type":"string"}},"description":"Bonus categories picked on pick-N cards, by group (vib-one, vib-max, cake-freedom, msb-mdigi)."}},"required":["place","cards"],"additionalProperties":false},"annotations":{"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false},"definitionHash":"f659d7da140aeec5fd4c6920341edae1a02a3d66a2e874d6b92a31e8b9d3c914","schemaStatus":"valid","origin":"official-registry","observedAt":"2026-11-02T13:46:04.616Z","metadataTrust":"untrusted"}],"endpoints":[{"endpointFingerprint":"1a4371a80fe6fac93b526cd01e07edd9d66aea77af297f1ccabc6ee14995a5b3","protocol":"streamable-http","status":"indexed","toolCount":1,"observedAt":"2026-11-02T13:46:04.616Z"}],"authentication":"unknown"},"connectionConfigurations":{"status":"ready","authentication":"not embedded","clients":{"Claude Desktop":{"mcpServers":{"app.openkrill/tapwhich":{"url":"https://tapwhich.openkrill.app/mcp"}}},"Cursor":{"mcpServers":{"app.openkrill/tapwhich":{"url":"https://tapwhich.openkrill.app/mcp"}}},"VS Code":{"servers":{"app.openkrill/tapwhich":{"type":"http","url":"https://tapwhich.openkrill.app/mcp"}}}}},"resourceType":"mcp-server","callable":true,"runtime":{"callable":true,"protocols":["mcp"]},"interfaces":[{"protocol":"mcp","transport":"streamable-http","url":"https://tapwhich.openkrill.app/mcp"}],"profile":{"apiVersion":"1","schemaVersion":"1","id":"mcp-server:app.openkrill%2Ftapwhich","resourceType":"mcp-server","canonicalUrl":"https://www.agentsjunction.com/api/v1/servers/app.openkrill%2Ftapwhich","name":"app.openkrill/tapwhich","description":"Which of your cards to tap at a place: the cashback, cap and conditions, from the banks' own pages.","interfaces":[{"protocol":"mcp","transport":"streamable-http","url":"https://tapwhich.openkrill.app/mcp"}],"capabilities":[],"identity":{"source":"official-registry","websiteUrl":"https://tapwhich.openkrill.app/","repositoryUrl":null,"version":"1.0.0"},"verification":{"state":"official","confidence":100},"operations":{"resourceType":"mcp-server","name":"app.openkrill/tapwhich","status":"online","lastCheckedAt":"2026-11-03T19:18:14.243Z","lastSuccessfulCheck":"2026-11-03T19:18:14.243Z","latencyMs":620,"consecutiveFailures":0,"isStale":false,"checks":{"endpointReachable":true,"protocolValid":true,"agentCardValid":null,"mcpHandshakeValid":true},"lastSeen":null,"lastSuccessfulInteraction":null,"lastHealthCheck":"2026-11-03T19:18:14.243Z","source":{"type":"health-check","url":null},"observedAt":"2026-11-03T19:18:14.243Z"},"security":null,"timestamps":{"createdAt":"2026-10-16T17:04:58.693Z","updatedAt":"2026-10-16T17:04:58.693Z","observedAt":"2026-11-03T19:18:14.243Z"},"compatibility":{"serverVersion":"1.0.0","protocolVersions":[{"protocol":"mcp","version":null}]}}}}