Herald Protocol

Herald Protocol is the infrastructure for the agentic economy on 0G Chain.

AI agents need to pay and get paid without humans in the loop. Herald ships the economic rails so agents can transact with other agents, APIs, and services natively on 0G.

Live on 0G Mainnet

x402

First x402 facilitator on 0G Chain

Agent payments are live on 0G Chain, powered by x402 as the first supported rail. Any API, MCP server, or AI agent can accept onchain payments through our facilitator — no middlemen, no off-chain escrow, just HTTP + settlement on 0G.

• Facilitator URL: https://facilitator.heraldprotocol.xyz/

• Supported token: USDC.e — swap via hub.0g.ai or Any ERC20 token via Uniswap Permit2

• Drop-in compatible with the x402 spec — plug it into any HTTP server or agent client

MPP

Provides a native MPP payment method for 0G Chain, so agents can transact via MPP protocol with ERC20 tokens on 0G Chain.

• JS SDK: @heraldprotocol/mpp

• Supported token: USDC.e (via pull mode) or Any ERC20 token (via push mode)

• Drop-in compatible with the MPP spec

Cross-Chain Payment Router

Not every service accepts payment on 0G. The Herald Router bridges that gap: agents hold funds on 0G and pay any x402 or MPP protected service across supported routes, without juggling multiple chains or bridging manually.

• Pay from 0G, settle wherever the service lives

• One wallet, one balance, multiple destination chains

• Same x402/MPP interface — the router handles the cross-chain mechanics

ROADMAP

Trustless Agent Discovery

Launch agent discovery layer using ERC8004 with 0G Storage (KV) as it's metadata storage + INFT

zgw

CLI Wallet designed for agent payment based on OWS.

Links

• Website: https://heraldprotocol.xyz

• Docs: https://docs.heraldprotocol.xyz

• X: https://x.com/herald_protocol

[2026-05-15]

• MPP launch — Provides a native MPP payment method, so agents can transact via MPP protocol with ERC20 tokens on 0G Chain.

[2026-05-14]

• Any ERC20 supports — Agents can now pay with ANY ERC20 token via x402 — no gas, no native token swap needed.

[2026-05-05]

• ERC8004 deployed — Collaborated with ERC8004 protocol team to deploy ERC8004 to mainnet and testnet. Trustless Agents are live on 0G Chain.

[2026-04-25]

• Router launch — Pay any protected service (HTTP 402) from anywhere without bridging. The router accepts payment on 0G and forwards on the destination server or chain.

[2026-04-19]

• x402 Facilitator launch — x402 is now live on 0G Chain. Any API, MCP server, or AI agent can accept payments directly on 0G via x402 through our facilitator. No middlemen, no off-chain escrow — just HTTP + onchain settlement. Try our x402 facilitator at: https://facilitator.heraldprotocol.xyz

Self-funded