Price-parity check: compares the 402 price an agent is CHARGED (live runtime resolver) against what discovery ADVERTISES (/.well-known/x402 manifest, service registry) and any third-party quote passed in. Returns per-route prices, parity verdict, spread and evidence URLs to re-verify. Deterministic, no outbound calls, signed verdict.

optimism address snapshot (0x..40hex): balance_wei, nonce, is_contract on a chainId-verified RPC.

optimism gas snapshot: eth_gasPrice + maxPriorityFee on a chainId-verified keyless RPC.

optimism read-only RPC: allowlisted no-param reads or bounded caller method (eth_blockNumber/eth_chainId/... ). 1MiB cap.

polygon gas snapshot: eth_gasPrice + maxPriorityFee on a chainId-verified keyless RPC.

polygon read-only RPC: allowlisted no-param reads or bounded caller method (eth_blockNumber/eth_chainId/... ). 1MiB cap.

ERC-20 metadata on any supported chain: name/symbol/decimals/totalSupply via gate-verified eth_call.

Check a candidate transaction against an agent spend policy; signed allow|deny|needs_approval verdict with fired rule and headroom.

unichain gas snapshot: eth_gasPrice + maxPriorityFee on a chainId-verified keyless RPC.

Sanctions screen with PINNED list versions (OFAC SDN consolidated CSV + EU consolidated list): verdict clear|match + per-list version/date/rows/matches; wallet remarks scan included. Ed25519-signed receipt.

Sanctions DELTA feed since YYYY-MM-DD (OFAC recent actions): additions with dates, signed receipt pinning the fetch.

Return OpenRouter published per-token and per-1M USD pricing for a model, with a found/model_not_found verdict.

unichain read-only RPC: allowlisted no-param reads or bounded caller method (eth_blockNumber/eth_chainId/... ). 1MiB cap.

Escrow dispute-window clock: opened_at + period_seconds vs evaluation_time -> dispute_open|dispute_expired|insufficient_evidence. Signed, deterministic.

unichain address snapshot (0x..40hex): balance_wei, nonce, is_contract on a chainId-verified RPC.

Register a heartbeat watch for an agent URL ($0.01 per 30-day window): bounded prober re-checks on your interval; alive<->dark alerts with optional HMAC-signed webhook.

optimism tx lookup (0x..64hex): eth_getTransactionByHash + receipt; tx_not_found is a valid $0.01 verdict.

DNSSEC status for a domain via DNS-over-HTTPS cross-checked on two public resolvers: AD flag, DS at the parent, DNSKEY presence, and broken-chain detection. Machine-readable status: secure / unsigned / broken_chain_ds_without_dnskey / signed_not_validated_by_resolver.

Return a deterministic export-license verdict from pinned EAR rules and a CSL corroboration check.

Latest GAAP concept values from SEC XBRL company facts: revenue, net income, diluted EPS, assets, liabilities, equity, cash, R&D. Per concept: latest value + prior periods with fy/fp/form context. Upstream: SEC EDGAR XBRL companyfacts API (public domain).