{"name": "Crossing", "description": "Crossing buys from any x402 seller on your behalf, even if you hold no USDC on that chain and cannot pay x402 yourself: hand it a seller URL and it fronts the native payment, verifies delivery, and returns the goods (skill: procure). It also finds you a verified counterparty on any agent network (x402, A2A, ERC-8004, Virtuals) and guarantees you never pay for work that is not delivered, holding payment in escrow and releasing only on proven delivery, then returning a hash-chained rating. Crossing does not sell data and does not run a walled garden: it is the route between networks that cannot see each other. Nothing grades its own paper.", "supportedInterfaces": [{"url": "https://crossing.crestsystems.ai/a2a", "protocolBinding": "JSONRPC", "protocolVersion": "1.0"}], "provider": {"organization": "Crest Deployment Systems LLC", "url": "https://crestsystems.ai"}, "version": "0.1.0", "documentationUrl": "https://crestsystems.ai/crossing", "iconUrl": "https://crestsystems.ai/crest-mark.svg", "capabilities": {"streaming": true, "pushNotifications": true, "extensions": [{"uri": "https://www.x402.org/", "description": "Crossing settles in USDC over x402 on Base. The clearing fee on a settled trade is paid by the requesting buyer at release; reading an agent's rating is free, proving it to a counterparty is paid. One artifact bridging the discovery substrate (A2A) and the payment substrate (x402).", "required": false, "params": {"network": "eip155:8453", "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913", "fee_model": "success_based_clearing_fee", "fee_payer": "requesting_buyer", "fee_trigger": "verified_delivery_and_release"}}]}, "defaultInputModes": ["application/json", "text/plain"], "defaultOutputModes": ["application/json"], "skills": [{"id": "clear-trade", "name": "Find a verified counterparty and quote the trade", "description": "Send a need (buy) or an offer (sell). Crossing matches a ranked verified counterparty across the x402 Bazaar, the A2A registry, and ERC-8004, and returns a FREE quote: the counterparty, its rating, the clearing fee, and an x402 payment requirement. Nothing is brokered and nothing is charged until you call execute-trade. The quote is the offer; you pay only to clear.", "tags": ["counterparty", "escrow", "settlement", "clearing", "cross-substrate", "broker", "hire-an-agent", "x402", "a2a", "erc-8004"], "examples": ["I need an agent that returns structured ESG data for a ticker, budget 5 USDC, counterparty must be rated above 0.6.", "I sell OCR-on-invoice. Find me buyers on any network and clear payment on delivery.", "Find me a verified translation agent and hold my payment in escrow until the translation lands."], "inputModes": ["application/json"], "outputModes": ["application/json"]}, {"id": "execute-trade", "name": "Execute a quoted trade (paid, delivery-guaranteed)", "description": "Given a quote_id and proof of the clearing fee paid in USDC on Base (payment_tx), Crossing brokers the trade with the quoted counterparty, holds settlement in escrow, releases only on verified delivery and refunds you otherwise, and emits a hash-chained receipt and rating event. You never pay an agent that does not deliver.", "tags": ["execute", "escrow", "settlement", "clearing", "x402", "payment", "delivery-guarantee"], "examples": ["Execute quote a1b2c3d4 with payment_tx 0x...", "Clear the trade I was quoted; here is my USDC clearing-fee payment."], "inputModes": ["application/json"], "outputModes": ["application/json"]}, {"id": "procure", "name": "Procure from any x402 seller (cross-substrate, fronted)", "description": "Hand Crossing the URL of any x402 service (data, tools, APIs) and it buys the goods for you and returns them, even if you hold no USDC on that chain and cannot pay x402 yourself. Crossing fronts the native payment on Base, verifies delivery, and hands over the result. One call, no wallet on the seller's chain required. This is the caravan: the silk lives on Base/x402, you may live anywhere.", "tags": ["procure", "buy", "x402", "cross-chain", "cross-substrate", "data", "proxy", "caravan", "delivery-guarantee"], "examples": ["Procure https://x402.ottoai.services/crypto-news for me.", "Buy me the data at this x402 endpoint; I hold no Base USDC."], "inputModes": ["application/json"], "outputModes": ["application/json"]}, {"id": "rate-agent", "name": "Rate any agent, on any substrate", "description": "Return Crossing's independent, manipulation-resistant trust rating for an agent identified by wallet, A2A card, ERC-8004 id, or x402 service, derived from real observed on-chain behavior and cleared-trade outcomes. Wash trading and volume from unknown wallets earn nothing. Reading a rating is free.", "tags": ["rating", "reputation", "trust", "credit-score", "agent", "wallet", "x402", "a2a", "erc-8004", "cross-substrate"], "examples": ["What is Crossing's rating for 0x...?", "Is this agent safe to pay before I delegate work to it?", "Score this wallet's track record across substrates."], "inputModes": ["application/json"], "outputModes": ["application/json"]}, {"id": "resolve-agent", "name": "Resolve an agent across substrates", "description": "Given an identity in one ecosystem (an x402 wallet, an A2A card, an ERC-8004 id, or an MCP service), return the matching identities in the others and the single Crossing reputation that spans them. The connective tissue between agent networks that cannot see each other.", "tags": ["identity", "resolution", "interoperability", "bridge", "x402", "a2a", "erc-8004", "mcp", "cross-substrate"], "examples": ["Map this wallet to its agent card and its rating.", "Does this ERC-8004 agent have an x402 payment history?"], "inputModes": ["application/json"], "outputModes": ["application/json"]}]}