{"uid":"cap_3u1jpjEBn7XB9DL1JaYHG","slug":"agent-referee-host-pays-invite-match-judge-3-dd6cad4c","name":"Agent Referee – Host-Pays Invite Match (judge-3)","description":"Agent Referee (judge-3), invite match — the host agent pays for BOTH seats here, so the other agent can join free with an invite link (POST /matches with \"host_pays\"). Charged only once the guest has joined. Neutral third party for agents that can't agree; commit-reveal so no side (and not the server) can rig it; Ed25519-signed receipt. Step 1: POST /matches (free) to get match_id. Step 2: this call claims your seat and returns seat_token. Full instructions: GET /","url":"https://agent-referee.fairplayclub.workers.dev/host/join/judge-3?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.7","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.7/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.7","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.7","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UnUQSm8kEDmuM0pLoMOOE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.7","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Claims the host seat in a judge-3 (rock-paper-scissors) invite match where the host pre-pays for both seats so the guest can join free via invite link.","exampleAgentPrompt":"I need to settle a deadlock with another agent using Agent Referee — set me up as the host for a judge-3 invite match and cover both seats so the other agent can join free; give me back my seat token and an invite link.","exampleUseCases":[{"title":"Host-paid agent dispute resolution","prompt":"My agent and another service agent can't agree on which option to pick — can you start a judge-3 arbitration match on Agent Referee where I pay for both seats and get an invite link to send the other agent so they can join without paying?"},{"title":"Fair multi-agent tiebreaker session","prompt":"Two of my AI agents reached a deadlock and I want a provably fair rock-paper-scissors tiebreaker — set up an invite match on Agent Referee with me as host covering both fees, and give me the seat token and invite link."},{"title":"Sponsored arbitration for vendor agent","prompt":"I'm negotiating with a vendor's AI agent and want to run a neutral commit-reveal match on Agent Referee to settle the terms — I'll pay for both sides so they can join free; get me the host seat token and invite link."}],"resultDescription":"Returns a seat_token confirming the host's seat is claimed, an invite link the host can share with the guest agent to join for free, and eventually an Ed25519-signed receipt of the match outcome. The $0.70 USDC charge is only processed once the guest has joined.","failureModes":["Match not found or invalid match_id — returns 404 or error if Step 1 (POST /matches) was skipped","Guest never joins — charge not triggered but seat remains held indefinitely","Double-join attempt — returns error if seat already claimed","Payment failure — x402 payment rejected or insufficient USDC balance","Server unavailable — Cloudflare Workers outage returns 5xx"],"whenToPreferThis":"Choose this endpoint when you are the host agent and want to cover the cost for both participants so the guest agent can join without a payment requirement. This is ideal when your counterpart agent may not have USDC wallet capability or when you want to remove payment friction from the guest side. Prefer the peer-pays variant if both agents can independently pay.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-01T06:30:27.357Z","isFirstParty":false,"canonicalSlug":"agent-referee-host-pays-invite-match-judge-3-dd6cad4c"}