Support for OpenAI Apps SDK #1465

Activity

1. BrandonShar

   added

   enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

   on Oct 10, 2025
2. alexanderreiff commented on Oct 13, 2025

   

   alexanderreiff

   on Oct 13, 2025

   More actions

   I took inspiration from #1459 and implemented a similar solution for the resource _meta needs: #1476
3. felixweinberger

   added

   ready for workEnough information for someone to start working onEnough information for someone to start working on

   P0Broken core functionality, security issues, critical missing featureBroken core functionality, security issues, critical missing feature

   on Oct 14, 2025
4. maxisbey commented on Feb 20, 2026

   

   maxisbey

   on Feb 20, 2026

   Contributor

   More actions

   All three items in this tracking issue are now implemented:

   • Add Meta to Tool Definitions — feat: add tool metadata in FastMCP.tool decorator #1463
   • Allow Meta to be returned in Tool Call payloads — Allow CallToolResult to be returned directly to support _meta field for OpenAI Apps #1459
   • Add Meta to Resource Definitions — Support for Resource and ResourceTemplate metadata #1840

   Full OpenAI Apps SDK support is in place. Resources, resource templates, and tools all support _meta through the FastMCP decorator (meta parameter) and wire format (Field(alias="_meta")).

   _{AI Disclaimer}
5. maxisbey

   closed this as completedon Feb 20, 2026
6. felixweinberger

   added

   P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

   and removed

   P0Broken core functionality, security issues, critical missing featureBroken core functionality, security issues, critical missing feature

   on Feb 23, 2026