Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

​ To learn more, see the sources I considered: [[1] Deprecating on 04/18/2026](https://docs.retellai.com/deprecation-notice/2026/04-18_conversation_node_tools) [[2] V1 API Deprecation, Listen to User Keypad Input, and More!](https://www.retellai.com/changelog/v1-api-deprecation-listen-to-user-keypad-input-and-more) [[3] Platform Changelogs | Retell AI](https://www.retellai.com/changelog) ​

### Answer Based on the available sources, there are two significant API deprecations to be aware of: ## Deprecation on 04/18/2026 - Conversation Node Tools [(1) ]() The

tools

and

tool_ids

fields on conversation nodes are being deprecated in favor of the new

subagent

node type . The conversation node type itself is not deprecated—it continues to work for nodes that don't use tools . What's changing: - After 04/18/2026, the API will stop accepting

tools

or

tool_ids

fields on

type: "conversation"

nodes - Existing conversation nodes with tools will be automatically migrated to

type: "subagent"

- Conversation nodes with tools that use static text instructions will be converted to subagent nodes with prompt text instructions Actions you need to take: - For conversation nodes with tools: change

type

from

"conversation"

to

"subagent"

- If the node uses a

static_text

instruction, change it to

prompt

- For conversation nodes without tools: no changes needed ## V1 API Deprecation - February 5, 2025 [(2) ]() [(3) ]() The V1 APIs and certain deprecated fields in webhooks were deprecated on February 5, 2025 . What was deprecated: - V1 APIs and deprecated fields inside APIs - The "data" field inside webhooks - The old Retell legacy dashboard For migration guidance, refer to the [migration documentation]() .