---
title: "Changes to Add Session Resource"
method: POST
path: "/v1/sessions/{session_id}/resources?beta=true"
---

# Changes to Add Session Resource

`POST /v1/sessions/{session_id}/resources?beta=true`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 2 of 68 revisions.

- **2026-08-17** `d2b230555b7f` — 1 breaking, 2 info
- **2026-04-08** `69486316563e` — 1 info

## Changes

- **2026-08-17** `d2b230555b7f` — 1 breaking, 2 info
  - the request property `oneOf[#/components/schemas/BetaManagedAgentsFileResourceParams]/mount_path` became not nullable
  - request property `oneOf[#/components/schemas/BetaManagedAgentsFileResourceParams]/mount_path` list-of-types was widened by adding types `null` to media type `application/json`
  - the `oneOf[#/components/schemas/BetaManagedAgentsFileResourceParams]/mount_path` request property's minLength was decreased from `1` to `0`
- **2026-04-08** `69486316563e` — 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/anthropics/apis/anthropic-api/docs/v1/sessions/:session_id/resources?beta=true/post.md) · [API](https://skmtc.dev/anthropics/apis/anthropic-api.md) · [Page](https://skmtc.dev/anthropics/apis/anthropic-api/changes/v1/sessions/:session_id/resources?beta=true/post)