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Get started with funding an app or agent to send messages with XMTP

Starting December 9, 2025, apps and agents must pay fees to send messages on the decentralized XMTP Broadcast Network.

This guide provides a timeline and checklist to prepare your app or agent for this transition.

Key production milestones

  • October 15, 2025:
    • The XMTP Gateway Service library is available in Go.
    • → Deploy your gateway service.
  • November 15 2025:
    • All client SDKs and are compatible with mainnet.
    • → Update your client SDKs.
    • XMTP payer wallets can be funded on mainnet.
    • → Fund your payer wallet.
  • December 9, 2025:
    • All message traffic is routed through the decentralized network.
    • → Older client SDKs are incompatible.

Required tasks

Complete these tasks by December 9, 2025, to ensure your app or agent can send messages on the decentralized XMTP Broadcast Network.

  1. From October 15: Deploy the XMTP Gateway Service to enable your app or agent to send messages and pay fees on XMTP mainnet.
  2. From November 15: Update your app or agent to use a decentralization-ready XMTP SDK to connect to your XMTP Gateway Service and fund your app or agent using the XMTP Funding Portal. We recommend funding 3-6 months of estimated usage.

Recommended next steps