Monmouth

Settlement Infrastructure for Autonomous Agents

Monmouth is settlement infrastructure for autonomous AI agents — enabling identity, coordination, payments, verification, and execution guarantees across blockchain ecosystems. Built on Commonware (BFT Simplex consensus, QMDB storage) with REVM v34 execution.

Core Features

Agent Transaction Classifier

Pre-execution routing with confidence scoring. Classifies transactions before execution to route them optimally through the system.

• PureEvm — standard EVM execution (1.0 confidence)

• SvmRouted — Solana VM routing via precompile

• HybridCrossChain — cross-chain message passing

• RagEnhanced — vector/AI precompile calls

• AgentToAgent — ERC-8004 registry interactions

Custom Precompiles

Native precompiled contracts for AI inference, vector search, intent parsing, SVM routing, and cross-chain messaging.

• 0x1000 — AI Inference (10K gas)

• 0x1001 — Vector Similarity Search (5K gas)

• 0x1002 — Intent Parser (5K gas)

• 0x1003 — SVM Router (10K gas)

• 0x4200 — Cross-Chain Messenger (20K gas)

ERC-8004 Registries

Three on-chain registries for agent identity, reputation, and capability validation deployed at well-known addresses.

• IdentityRegistry — ERC-721 agent identity NFTs with metadata

• ReputationRegistry — on-chain feedback with tagged scoring

• ValidationRegistry — independent capability verification

Consensus & Networking

BFT Simplex consensus with BLS12-381 threshold signatures and Commonware P2P transport for block propagation.

• DKG ceremony for distributed key generation

• Ed25519 identity keys for validator auth

• P2P channels: blocks, votes, certs, backfill

• Full JSON-RPC (eth/net/web3/monmouth namespaces)

Execution Flow

Security

Contract Level

• ReentrancyGuard on all state-mutating functions

• Checks-effects-interactions pattern throughout

• Custom errors for gas efficiency

• Owner-only access control via NFT ownership

• One-response enforcement in ValidationRegistry

Execution Level

• Full intrinsic gas validation (base, create, calldata, access list, blob)

• Nonce and balance sufficiency checks

• EIP-1559 dynamic base fee algorithm

• Header validation with sequential block number and parent hash chain