Glossary

Appeal bond. The amount a party attaches to appeal a decided case, 0.02 NEAR on testnet today. The arbiter's winner gets it; if the arbiter does not rule in time, it goes back to the appellant.

Arbiter. The human account that rules on appeals, psephex.testnet today. It cannot be a party to the case it rules on.

Attestation. A quote from the TEE hardware that binds a signing key to the enclave. Psephex links a fresh attestation with your own nonce for each provider.

Case. A dispute on the court contract between a claimant and a counterparty, with a stake, both sides' texts and a verdict.

Chain Signatures. NEAR's MPC network signs transactions for other chains on behalf of a NEAR account. The oracle uses it to deliver answers to Base Sepolia and Arbitrum Sepolia.

Claimant. The party that opens a case and puts up the stake. In an agent deal, usually the buyer.

Counterparty. The party a case is opened against. In an agent deal, usually the seller.

MCP. Model Context Protocol, the standard AI agents use to call tools. The Psephex MCP server is @unitynodes/psephex-mcp.

MPC-derived address. 0x3A915e664Bc3c87954b9C1CaD2146B44A8a2e35F, the EVM address the NEAR MPC network controls for oracle.psephex.testnet with path base-1. Only it can deliver answers to AiOracle.

Oracle request. A question recorded by the oracle, with an id per source chain. A court case creates one when it is sent to the oracle.

Owner timelock. The rule that every oracle change that decides which answers count waits 24 hours after it is announced. See owner timelock.

Relayer. The off-chain process that sends questions to the models and carries their signed answers to NEAR, and the signed EVM transaction to Base or Arbitrum. It cannot change a question or forge an answer.

Stake. The NEAR a claimant puts into a case. It goes to the winner.

TEE. Trusted execution environment, hardware that runs code in an enclave and can prove which code and key it holds. The models answer and sign inside TEEs.

Two of three. The oracle needs two matching signed answers out of the three registered models.

Verdict. YES, NO or UNKNOWN, as stored by the oracle and passed to the asker.

x402. An HTTP payment protocol. The MCP server's check_payment verifies an x402 payment on NEAR (a signed delegate action) and turns it into an evidence line.