_ registry / mcp http-sse · checked 1h ago

Crosswire

https://api.crosswire-api.com

Registry code: 77f940c24c485ed2

api record

Crosswire is a pre-trade resolution-truth gate for autonomous cross-venue trading agents. Before an agent hedges two same-looking contracts on different venues, call check_resolution_risk to learn whether they actually settle on the same source / instant / rules — verdict safe / caution / block, with the exact divergence and structured findings. Paid inventory: cross-venue crypto oracle-divergence pairs (e.g. daily matched-strike BTC, Kalshi BRTI vs Polymarket Binance-close) — metered at $0.02 USDC/call after 3 free calls/day. Free demo: World Cup 2026 football pairs (Polymarket/Kalshi), free…

endpoint
https://api.crosswire-api.com/mcp
protocol
http-sse ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is Crosswire live?
Yes — it answered the hub's last check (checked 1h ago). It answered 99% of checks over the last 30 days.
Is Crosswire free to use?
Yes — the hub reached it with no key and no payment.
What tools does Crosswire have?
2 tools: list_covered_events, check_resolution_risk.
Is Crosswire safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
99.2%

90 days 99.6%· all time 99.6%

latency
321ms

last good check

priced tools
0

of 2 tools

_ answered our checks, 90 days 498 checks · signed record
  • degraded → live
  • live → degraded· timeout after 20000ms
  • degraded → live
  • live → degraded· timeout after 20000ms
  • degraded → live
_ what it is for
used for
  • check whether two cross-venue contracts resolve the same way
  • list covered event markets
takes → gives
text → data
tools
2 reads
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 2 tools
2 open 2 of 2 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • list_covered_events reads open 1h ago

    Free discovery of everything check_resolution_risk can audit across both inventories — the free World Cup football pairs and the metered crypto oracle-divergence pairs (the 'crypto:' namespace is the paid surface: $0.02 USDC per call after 3 free calls/day). Returns the covered canonical events, their per-outcome pair ids (…#home / #draw / #away for football), the Polymarket conditionIds and Kalshi tickers with outcome labels for each pair, match dates, the frozen ruleset_sha pinning the identity graph, the coverage kickoff cutoff, and snapshot freshness. Use a returned pair_id (or a pair's two market ids) as input to check_resolution_risk.

    mcp-tool

    {
      "type": "object",
      "properties": {},
      "additionalProperties": false
    }
    arguments 5 lines
  • check_resolution_risk reads open 1h ago

    Pre-trade safety check for cross-venue event markets (crypto oracle-divergence pairs, metered; World Cup football, free). Flags resolution mismatches, void-rule divergence, scope differences (e.g. 90-minute vs extra-time; matched vs differing strike), settlement-source and -timing gaps, stale data, and thin liquidity between the two Polymarket and Kalshi legs BEFORE you execute both. Returns a machine-readable verdict — execution_verdict: safe / caution / block — inside a full Fungibility & Settlement Audit Object (FSAO) with structured findings, top-level divergence flags, venue rule overrides, fee-adjusted spread, and verdict reasons. Identify the pair by EITHER canonical_event_id (a live pair id from list_covered_events — the metered 'crypto:' inventory rolls daily, so fetch a current id there rather than reusing an old one; the free 'wc26:' World Cup pairs are stable) OR market_a + market_b (one Polymarket conditionId + one Kalshi ticker, order-insensitive). If the pair is not covered, returns a non-error coverage reply (covered: false) naming the covered inventories (free World Cup football + metered crypto pairs) and the coverage cutoff instead of an FSAO.

    mcp-tool

    {
      "type": "object",
      "properties": {
        "mode": {
          "type": "string",
          "default": "advisory",
          "description": "'advisory' (default) or 'strict'."
        },
        "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)."
        },
        "market_a": {
          "anyOf": [
            {
              "type": "object",
              "required": [
                "venue",
                "market_id"
              ],
              "properties": {
                "side": {
                  "anyOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "null"
                    }
                  ],
                  "default": null,
                  "description": "'yes' | 'no' if applicable. Optional, informational."
                },
                "venue": {
                  "enum": [
                    "polymarket",
                    "kalshi"
                  ],
                  "type": "string",
                  "description": "The venue: 'polymarket' or 'kalshi'."
                },
                "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."
                },
                "market_id": {
                  "type": "string",
                  "description": "Venue-native market id: Polymarket conditionId (0x… hex) or Kalshi market ticker (e.g. 'KXWCGAME-26JUN11MEXRSA-MEX')."
                }
              },
              "description": "One outcome leg on one venue (mirrors the REST `AuditRequest` refs)."
            },
            {
              "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": [
            {
              "type": "object",
              "required": [
                "venue",
                "market_id"
              ],
              "properties": {
                "side": {
                  "anyOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "null"
                    }
                  ],
                  "default": null,
                  "description": "'yes' | 'no' if applicable. Optional, informational."
                },
                "venue": {
                  "enum": [
                    "polymarket",
                    "kalshi"
                  ],
                  "type": "string",
                  "description": "The venue: 'polymarket' or 'kalshi'."
                },
                "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."
                },
                "market_id": {
                  "type": "string",
                  "description": "Venue-native market id: Polymarket conditionId (0x… hex) or Kalshi market ticker (e.g. 'KXWCGAME-26JUN11MEXRSA-MEX')."
                }
              },
              "description": "One outcome leg on one venue (mirrors the REST `AuditRequest` refs)."
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Second leg of the pair to audit (the other venue)."
        },
        "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."
        },
        "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."
        }
      },
      "additionalProperties": false
    }
    arguments 157 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

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Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 77f940c24c485ed2.

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_ for your README measured, not declared

measured by brick.blue

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The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
60%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
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work
attempts
0
accepted
0
rejected
0
acceptance rate
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settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.