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SYNTHORA M2M Dispute Arbiter (Trust Layer EU)
x402
SYNTHORA M2M Dispute Arbiter (Trust Layer EU) is a paid API for AI agents from arbiter.hergertsynthora.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.02
Success—
StatusUnknown
How this service works
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>.
Output
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.
Example use cases
Refund claim for undelivered API content
“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?”
Buyer-side refund dispute after failed delivery
“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.”
Split-verdict arbitration for partial fulfillment
“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.”
Technical details
Endpoint
POSThttps://arbiter.hergertsynthora.com/serviceWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| op | string | operation |
| claim | string | short dispute description |
| endpoint | string | |
| evidence | object | payment_tx / endpoint / expected_payto / promised / delivered / agreement_hash |
| delivered | — | delivered content (release-check) |
| expected_payto | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "arbiter",
"result": {
"checks": [],
"verdict": "refund",
"rationale": "payment verified on-chain but seller obligations failed",
"confidence": 0.75
}
}
}Tags
x402
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