Skip to main content
POST
/
v1
/
agents
/
{agent_id}
/
sandbox
/
file_read
Sandbox: File Read
curl --request POST \
  --url https://api.xpander.ai/v1/agents/{agent_id}/sandbox/file_read \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "path": "config.yaml",
  "start_line": 2,
  "end_line": 2,
  "encoding": "utf-8"
}
'
{
  "status": "ok",
  "stdout": "<string>",
  "stderr": "<string>",
  "exit_code": 123,
  "content": "<string>",
  "path": "<string>",
  "matches": [
    {}
  ],
  "url": "<string>",
  "error": "<string>"
}
Read a file from the per-agent sandbox filesystem. Optional line ranges let you page through large files without loading them entirely.

​
Path Parameters

​
agent_id
string
required
Agent ID (UUID)

​
Request Body

​
path
string
required
Path to the file relative to the sandbox root.
​
start_line
integer
1-based line number to start reading from. Optional; reads from the beginning when omitted.
​
end_line
integer
1-based line number to stop reading at (inclusive). Optional; reads to the end when omitted.
​
encoding
string
default:"utf-8"
Text encoding used to decode the file contents.

​
Response

​
status
string
Result status (e.g., ok).
​
content
string
File contents within the requested range.
​
path
string
The file path that was read.

​
Example Request

curl -X POST "https://api.xpander.ai/v1/agents/<agent-id>/sandbox/file_read" \
  -H "Content-Type: application/json" \
  -H "x-api-key: <your-api-key>" \
  -d '{
    "path": "config.yaml",
    "start_line": 1,
    "end_line": 50,
    "encoding": "utf-8"
  }'

​
Notes

  • Paths must be relative to the sandbox root. Absolute paths are rejected.
  • For binary files, set encoding appropriately or use Sandbox: File Share to retrieve the file via a public URL.

​
See Also

Authorizations

​
x-api-key
string
header
required

API Key for authentication

Path Parameters

​
agent_id
string
required

Agent UUID

Body

application/json

Request body for reading a file from the agent sandbox.

​
path
string
required

Path to the file relative to the sandbox root.

Example:

"config.yaml"

​
start_line
integer

1-based line number to start reading from. Optional; reads from the beginning when omitted.

Required range: x >= 1
​
end_line
integer

1-based line number to stop reading at (inclusive). Optional; reads to the end when omitted.

Required range: x >= 1
​
encoding
string
default:utf-8

Text encoding used to decode the file contents.

Response

Successful Response

Generic response wrapper returned by agent sandbox endpoints. Not every field is populated for every tool.

​
status
string

Result status of the sandbox operation.

Example:

"ok"

​
stdout
string | null

Standard output captured from the sandbox command. Present for bash.

​
stderr
string | null

Standard error captured from the sandbox command. Present for bash.

​
exit_code
integer | null

Process exit code returned by the sandbox. Present for bash.

​
content
string | null

File contents. Present for file_read.

​
path
string | null

File path affected by the operation. Present for file_write, file_edit, multi_edit, file_share.

​
matches
Matches · object[] | null

Match results. Present for glob and grep.

​
url
string<uri> | null

Public CDN URL. Present for file_share.

​
error
string | null

Error message when the operation fails.