# Zund Router: send a bundle once, reach 8 builders (free, ~2 ms response)

**URL:** https://collective.flashbots.net/t/zund-router-send-a-bundle-once-reach-8-builders-free-2-ms-response/6080
**Category:** Searchers
**Created:** [October 12, 2026, 12:52pm UTC](https://collective.flashbots.net/t/zund-router-send-a-bundle-once-reach-8-builders-free-2-ms-response/6080 "2026-10-12T12:52:40Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ZundBuilder](https://collective.flashbots.net/letter_avatar_proxy/v4/letter/z/ecb155/32.png) [@ZundBuilder](https://collective.flashbots.net/u/ZundBuilder)
#### Post date: [October 12, 2026, 12:52pm UTC](https://collective.flashbots.net/t/zund-router-send-a-bundle-once-reach-8-builders-free-2-ms-response/6080/1 "2026-10-12T12:52:40Z")

</div>

Hi all, we run Zund, a small independent block builder.

We just opened the **Zund Router** : one endpoint that forwards your `eth_sendBundle` to Titan, Quasar, BuilderNet, Eureka, Beaver, bombora, the Flashbots relay and Zund in parallel.

**How it works**

- Your request body and your `X-Flashbots-Signature` are forwarded unchanged, so each builder sees you, not us.
- Response is immediate (~2 ms median); per-builder results are available via `zund_routerStatus`. Use `?wait=1` if you prefer to wait for all builders.
- Warm keep-alive connections to every builder: overhead vs a warm direct send is ~0.5-1 ms; vs a cold direct send it is faster (cold Titan ~58 ms, cold Flashbots relay ~400 ms in our tests).
- Bundles shaped like sandwiches are not forwarded.
- Free, no API key, 30 req/s per IP.

Endpoint and docs: [https://zundbuilder.com/router](https://zundbuilder.com/router)

Feedback and criticism welcome, especially latency numbers from your own location.