{"uid":"cap_5DUMAvaZgW7S5ebfdn1DS","slug":"synthora-m2m-dispute-arbiter-trust-layer-eu-62267cf7","name":"SYNTHORA M2M Dispute Arbiter (Trust Layer EU)","description":"M2M Dispute Arbiter: deterministic evidence checks (on-chain payment on Base, endpoint liveness, payTo integrity, delivery vs promise, notarized agreement) and an Ed25519-signed verdict: release / refund / split / insufficient_evidence. Escrow release-check included. No fund custody. $0.02 USDC via x402 on Base. SYNTHORA Trust Layer (EU). First 3 calls FREE per wallet - send header X-WALLET: 0x<addr>.","url":"https://arbiter.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"op":{"enum":["dispute","release-check"],"type":"string","description":"operation"},"claim":{"type":"string","description":"short dispute description"},"endpoint":{"type":"string"},"evidence":{"type":"object","description":"payment_tx / endpoint / expected_payto / promised / delivered / agreement_hash"},"delivered":{"description":"delivered content (release-check)"},"expected_payto":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"arbiter","result":{"checks":[],"verdict":"refund","rationale":"payment verified on-chain but seller obligations failed","confidence":0.75}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IyVKe9rAN6mI7y5s12CnR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Deterministically arbitrates machine-to-machine micro-deal disputes, returning an Ed25519-signed verdict (release, refund, or split) and performing escrow release eligibility checks without holding funds.","exampleAgentPrompt":"I paid for an API call via x402 but the seller never delivered the promised response — can you open a dispute with the evidence (payment_tx, agreement_hash, and what was promised vs what was delivered) and get a signed verdict on whether I'm owed a refund?","exampleUseCases":[{"title":"Refund claim for undelivered API content","prompt":"An agent paid me 0.02 USDC for a data response but I'm being accused of not delivering — can you submit a release-check with the payment transaction, the agreement hash, and the delivered content so we get a signed verdict on whether the escrow should be released to me?"},{"title":"Buyer-side refund dispute after failed delivery","prompt":"I sent a micro-payment to endpoint https://api.example.com/data but got nothing back. Please file a dispute with the payment tx, the expected payto address, what was promised, and what was actually delivered so I can get an arbitrated refund verdict."},{"title":"Split-verdict arbitration for partial fulfillment","prompt":"There's a dispute between two agents over a micro-deal — the seller delivered something but not exactly what was agreed. Submit the evidence including the agreement hash, promised terms, and delivered content to get an Ed25519-signed verdict on whether a refund, release, or split is appropriate."}],"resultDescription":"A JSON object containing an 'ok' status, a 'niche' field confirming the arbiter role, and a 'result' object with: a list of checks performed, a verdict string ('release', 'refund', or 'split'), a human-readable rationale explaining the decision, and a confidence score (0–1). The verdict is Ed25519-signed for cryptographic verifiability.","failureModes":["Missing or malformed evidence object results in an inability to evaluate the dispute","Invalid or unverifiable payment_tx causes on-chain verification to fail","Agreement hash mismatch between parties leads to inconclusive verdict","Insufficient evidence for a high-confidence verdict returns low confidence score","Unsupported operation type in 'op' field returns a validation error","Network or upstream failure returns a non-200 response"],"whenToPreferThis":"Choose this endpoint when two autonomous agents or M2M micro-deal participants need a neutral, deterministic, cryptographically signed arbitration verdict without requiring a custodial escrow service. It is especially suited for x402-based payment disputes where on-chain payment verification is needed alongside obligation fulfillment checking. Prefer this over manual dispute processes or human-reviewed systems when speed, auditability, and non-custodial resolution are priorities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:33:15.548Z","isFirstParty":false}