# \#relay

**URL:** https://collective.flashbots.net/tag/relay/148.md

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## [Is the Sepolia relay behind a policy/whitelist? ](https://collective.flashbots.net/t/is-the-sepolia-relay-behind-a-policy-whitelist/5496)

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**Author:** [@carlos23](https://collective.flashbots.net/u/carlos23)\
**Replies:** 0\
**Last updated:** [January 18, 2026, 11:43am UTC](https://collective.flashbots.net/t/is-the-sepolia-relay-behind-a-policy-whitelist/5496 "2026-01-18T11:43:37Z")

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I’m getting signature is required / invalid flashbots signature from https://relay-sepolia.flashbots.net even with the official SDK and minimal payload. It does verifies the signature against the Mainnet relay though. I…

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## [Notice to \`relay.flashbots.net\` users: JSON-RPC Compatible Errors Coming January 9, 2025](https://collective.flashbots.net/t/notice-to-relay-flashbots-net-users-json-rpc-compatible-errors-coming-january-9-2025/4233)

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**Author:** [@Tymur](https://collective.flashbots.net/u/Tymur)\
**Replies:** 1\
**Last updated:** [December 12, 2024, 6:40pm UTC](https://collective.flashbots.net/t/notice-to-relay-flashbots-net-users-json-rpc-compatible-errors-coming-january-9-2025/4233 "2024-12-12T18:40:57Z")

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We are going to upgrade relay.flashbots.net to JSON-RPC compatible errors on January 9th, 2025. Context Due to historic reasons, the Flashbots bundle-relay (relay.flashbots.net) returns errors in a non-standard way. S…