Kaia MEV Auction (Mainnet) + Bid Fee Reimbursement Program — how Searchers can get started

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TL;DR

Why this matters

MEV is unavoidable in modern block production. The question is whether it’s:

  • opaque and hard to reason about, or

  • observable and manageable at a network/ecosystem level.

Kaia MEV Auction is designed to make MEV outcomes more transparent while providing a clear participation path for Searchers.

What the article covers

  • Concept overview: what “MEV Auction” means on Kaia

  • Mechanics (KIP-249): how the slot-based auction model fits into block production

  • How to participate: the basic flow for Searchers (what you do, what happens on execution)

  • Onboarding support: Bid Fee Reimbursement Program (kept lightweight here—see article for specifics)

If you want to join as a Searcher

Start with the article and follow the “how to use” flow end-to-end.

If anything is unclear (eligibility, integration assumptions, operational constraints), drop your questions in this thread and include:

  • whether you’re testing on Kairos vs mainnet

  • what you’re trying to execute (general is fine)

  • where you’re getting stuck (deposit, bidding flow, execution, monitoring, etc.)

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Concrete scenario: you’re onboarding as a Searcher on Kaia mainnet and want a cleaner, more predictable participation path than mempool “spray & pray” — plus a way to verify outcomes before you scale automation.

Things to design for:

  • Model the flow as steps, not magic: treat deposit → sealed bid submission → execution → monitoring as discrete stages, with retries + idempotency so failures don’t create weird double-spends / double-submits.
  • Build around slot-based behavior (KIP-249): bids are per slot, so timing, missed-slot handling, and “what do we do next slot?” should be first-class in your bot logic.
  • Make observability part of the loop: wire MEV Explorer checks into your runbook early (fills, slot outcomes, basic stats) before you touch higher-frequency or larger-scale workloads.
  • Keep reimbursement assumptions lightweight: the Bid Fee Reimbursement is limited and can be excluded for policy / network-stability violations — don’t hardcode expectations; confirm eligibility + terms in the write-up.

Start here (end-to-end guide): https://docs.kaia.io/build/tutorials/mev-auction-sdk-guide/
Read the full write-up: https://medium.com/kaiachain/kaia-mev-auction-launch-bid-fee-reimbursement-program-b7eea295bfb9
Spec (KIP-249): https://kips.kaia.io/KIPs/kip-249
MEV Explorer: https://mev.kaia.io/ (Kairos: https://mev-kairos.kaia.io/)

If you’re onboarding as a Searcher, reply in this thread with:

  • Network: mainnet vs Kairos
  • Goal: what you’re trying to execute (high-level is fine)
  • Stuck point: deposit/bidding /execution/monitoring
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