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HomeDocsClaude Developer Platform 25 Aug 2026
One change · api

Add Session Resource changedapi/beta/sessions/resources/add

Nearest release: v2.1.245, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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Lines+18added
Lines−19removed
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First seen 14 Aug 2026 this site's first read of the page
Recorded edits17to this page, all time

# Add Session Resource ## Path parameters ## Headers ## Body parameters ## Returns ## Example ### Response (200) ## Add Session Resource ### Path Parameters ### Header Parameters ### Body Parameters ### Returns ### Example #### Response

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1---
2title: Add Session Resource
3url: https://platform.claude.com/docs/en/api/beta/sessions/resources/add
4---
1# Add Session Resource
52 
6## Add Session Resource
3**POST** `/v1/sessions/{session_id}/resources`
74 
8**post** `/v1/sessions/{session_id}/resources`
9 
105Add Session Resource
116 
12### Path Parameters
7## Path parameters
138 
149- `session_id: string`
1510 
16### Header Parameters
11## Headers
1712 
1813- `"anthropic-beta": optional array of AnthropicBeta`
1914 
from line 86
9186 
9287 - `"mid-conversation-tool-changes-2026-07-01"`
9388 
94### Body Parameters
89## Body parameters
9590 
9691- `file_id: string`
9792 
9893 ID of a previously uploaded file.
9994 
95 minLength: 1, maxLength: 128
96 
10097- `type: "file"`
10198 
102 - `"file"`
103 
10499- `mount_path: optional string or null`
105100 
106101 Mount path in the container. Defaults to `/mnt/session/uploads/<file_id>`.
107102 
108### Returns
103 minLength: 1, maxLength: 4096
109104 
110- `BetaManagedAgentsFileResource object { id, created_at, file_id, 3 more }`
105## Returns
111106 
107- `BetaManagedAgentsFileResource object`
108 
112109 - `id: string`
113110 
114111 - `created_at: string`
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115112 
116113 A timestamp in RFC 3339 format
117114 
115 format: date-time
116 
118117 - `file_id: string`
119118 
120119 - `mount_path: string`
from line 120
121120 
122121 - `type: "file"`
123122 
124 - `"file"`
125 
126123 - `updated_at: string`
127124 
128125 A timestamp in RFC 3339 format
129126 
130### Example
127 format: date-time
131128 
132```http
129## Example
130 
131```bash
133132curl https://api.anthropic.com/v1/sessions/$SESSION_ID/resources \
134133 -H 'Content-Type: application/json' \
135134 -H 'anthropic-version: 2023-06-01' \
from line 141
142141 }'
143142```
144143 
145#### Response
144### Response (200)
146145 
147146```json
148147{
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