{"name":"com.crosswire-api/crosswire-polymarket-kalshi-arbitrage","slug":"crosswire-api-crosswire-polymarket-kalshi-arbitrage","title":"Crosswire — Polymarket & Kalshi Arbitrage","description":"Cross-venue Polymarket+Kalshi arbitrage: resolution mismatch, void risk & settlement divergence.","url":"https://mcp.market/server/crosswire-api-crosswire-polymarket-kalshi-arbitrage","rating":null,"grade":"B","score":80,"certified":false,"status":"active","category":"other","tags":[],"presence":{"score":17,"stars":1,"forks":0,"downloads_week":null,"last_push_at":"2026-06-21T17:10:19.000Z","license":"MIT"},"uptime":{"percent":100,"checks":28,"ok":28,"last_checked_at":"2026-11-04T03:40:39.264Z","last_ok_at":"2026-11-04T03:40:39.264Z","latency_ms":217},"claimed":false,"transport":"remote","callable_via_gateway":true,"default_price_micros":0,"repository":"https://github.com/NicolasDuarte04/crosswire-mcp","website":"https://crosswire-api.com","version":"0.6.2","remotes":[{"type":"streamable-http","url":"https://api.crosswire-api.com/mcp"}],"packages":[],"tools":[{"name":"check_resolution_risk","description":"Pre-trade safety check for cross-venue event markets (crypto\noracle-divergence pairs, metered; World Cup football, free). Flags\nresolution mismatches, void-rule divergence, scope differences\n(e.g. 90-minute vs extra-time; matched vs differing strike),\nsettlement-source and -timing gaps, stale data, and thin liquidity\nbetween the two Polymarket and Kalshi legs BEFORE you execute both.\nReturns a machine-readable verdict — execution_verdict:\nsafe / caution / block — inside a full Fungibility & Settlement Audit Object\n(FSAO) with structured findings, top-level divergence flags, venue\nrule overrides, fee-adjusted spread, and verdict reasons. Identify the\npair by EITHER canonical_event_id (a live pair id from\nlist_covered_events — the metered 'crypto:' inventory rolls daily, so\nfetch a current id there rather than reusing an old one; the free 'wc26:'\nWorld Cup pairs are stable) OR market_a + market_b (one Polymarket\nconditionId + one Kalshi ticker, order-insensitive). If the pair is not\ncovered, returns a non-error\ncoverage reply (covered: false) naming the covered inventories (free\nWorld Cup football + metered crypto pairs) and the coverage cutoff\ninstead of an FSAO.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"market_a":{"anyOf":[{"description":"One outcome leg on one venue (mirrors the REST `AuditRequest` refs).","properties":{"venue":{"enum":["polymarket","kalshi"],"type":"string","description":"The venue: 'polymarket' or 'kalshi'."},"market_id":{"description":"Venue-native market id: Polymarket conditionId (0x… hex) or Kalshi market ticker (e.g. 'KXWCGAME-26JUN11MEXRSA-MEX').","type":"string"},"outcome":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"Venue-native outcome label. Optional — pair matching uses only (venue, market_id); when omitted the venue's binary book key ('Yes' on Polymarket, 'yes' on Kalshi) is assumed."},"side":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"'yes' | 'no' if applicable. Optional, informational."}},"required":["venue","market_id"],"type":"object"},{"type":"null"}],"default":null,"description":"First leg of the pair to audit (either venue; order does not matter). Provide market_a AND market_b together, or use canonical_event_id instead."},"market_b":{"anyOf":[{"description":"One outcome leg on one venue (mirrors the REST `AuditRequest` refs).","properties":{"venue":{"enum":["polymarket","kalshi"],"type":"string","description":"The venue: 'polymarket' or 'kalshi'."},"market_id":{"description":"Venue-native market id: Polymarket conditionId (0x… hex) or Kalshi market ticker (e.g. 'KXWCGAME-26JUN11MEXRSA-MEX').","type":"string"},"outcome":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"Venue-native outcome label. Optional — pair matching uses only (venue, market_id); when omitted the venue's binary book key ('Yes' on Polymarket, 'yes' on Kalshi) is assumed."},"side":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"'yes' | 'no' if applicable. Optional, informational."}},"required":["venue","market_id"],"type":"object"},{"type":"null"}],"default":null,"description":"Second leg of the pair to audit (the other venue)."},"canonical_event_id":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"A covered pair id — the outcome-suffixed canonical id. Two namespaces: the metered crypto oracle-divergence inventory (shape 'crypto:btc-above:<date>:strike-<n>#above' — $0.02 USDC per call after 3 free calls/day; the daily pair rolls, so fetch a current id from list_covered_events rather than reusing an old one) and the free World Cup football pairs (shape 'wc26:match:<TEAMS>:<date>:result#home|#draw|#away'; the suffix selects the outcome leg-pair). A bare event id without the suffix is ambiguous and only accepted when market_a + market_b are also given to select the leg. Always get live pair ids from list_covered_events."},"notional_usd":{"anyOf":[{"type":"number"},{"type":"null"}],"default":null,"description":"Intended position size in USD. Optional; sizes the thin-liquidity check against live top-of-book depth."},"mode":{"default":"advisory","description":"'advisory' (default) or 'strict'.","type":"string"},"api_key":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"Crosswire API key (cw_…). Optional. Free for the World Cup graph and the first calls/day on metered crypto pairs; beyond that, metered crypto calls draw down this key's prepaid USDC balance (top up via the x402 /v1/credits/topup endpoint)."}},"additionalProperties":false}},{"name":"list_covered_events","description":"Free discovery of everything check_resolution_risk can audit across\nboth inventories — the free World Cup football pairs and the metered\ncrypto oracle-divergence pairs (the 'crypto:' namespace is the paid\nsurface: $0.02 USDC per call after 3 free calls/day). Returns the\ncovered canonical events, their per-outcome pair ids (…#home / #draw /\n#away for football), the Polymarket conditionIds and Kalshi tickers\nwith outcome labels for each pair, match dates, the frozen ruleset_sha\npinning the identity graph, the coverage kickoff cutoff, and snapshot\nfreshness. Use a returned pair_id (or a pair's two market ids) as input\nto check_resolution_risk.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{},"additionalProperties":false}}],"scan":{"score":80,"grade":"B","scanned_at":"2026-09-26T21:20:24.235Z","report":{"scannerVersion":"0.1.9","scannedAt":"2026-09-26T21:20:24.150Z","components":{"code":{"score":-1,"max":25,"notes":["remote-only server, no package to scan"]},"reliability":{"score":20,"max":20,"notes":["remote reachable in 623ms"]},"poisoning":{"score":15,"max":15,"notes":["2 tool descriptions checked"]},"auth":{"score":10,"max":15,"notes":["open endpoint, read-only tools"]},"maintenance":{"score":8,"max":15,"notes":["last push 97 days ago"]},"identity":{"score":7,"max":10,"notes":["namespace and repository owner differ","GitHub account older than a year","website matches verified namespace"]}},"findings":[],"inputs":{"probes":[{"url":"https://api.crosswire-api.com/mcp","reachable":true,"authRequired":false,"latencyMs":623,"serverInfo":{"name":"Crosswire","version":"0.6.1"}}],"packages":[],"repo":{"found":true,"owner":"NicolasDuarte04","repo":"crosswire-mcp","archived":false,"pushedAt":"2026-06-21T17:10:19Z","stars":1,"forks":0,"openIssues":0,"ownerType":"User","ownerAvatarUrl":"https://avatars.githubusercontent.com/u/208290101?v=4","ownerCreatedAt":"2025-04-19T17:13:08Z","license":"MIT"},"icon":{"url":"https://crosswire-api.com/ds/assets/favicon.svg","source":"site"},"presence":{"stars":1,"forks":0,"downloadsWeek":null,"license":"MIT","lastPushAt":"2026-06-21T17:10:19.000Z","score":17}}}},"grade_history":[],"reviews":[]}