Kernel Browser Replays API
Record and manage browser session video replays.
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OpenAPI Specification
openapi: 3.2.0
info:
description: Developer tools and cloud infrastructure for AI agents to use web browsers
title: Kernel Browser Replays API
version: 0.1.0
servers:
- description: API Server
url: https://api.onkernel.com
security:
- bearerAuth: []
tags:
- description: Record and manage browser session video replays.
name: Browser Replays
paths:
/browsers/{id_or_name}/replays:
get:
description: List all replays for the specified browser session.
operationId: listBrowsersReplays
parameters:
- description: Browser session ID or name
example: htzv5orfit78e1m2biiifpbv
in: path
name: id_or_name
required: true
schema:
type: string
responses:
'200':
content:
application/json:
schema:
items:
$ref: '#/components/schemas/BrowserReplay'
type: array
description: List of replays retrieved successfully.
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'500':
$ref: '#/components/responses/InternalError'
security:
- bearerAuth: []
summary: List browser session replays
tags:
- Browser Replays
post:
description: Start recording the browser session and return a replay ID.
operationId: startBrowserReplayRecording
parameters:
- description: Browser session ID or name
example: htzv5orfit78e1m2biiifpbv
in: path
name: id_or_name
required: true
schema:
type: string
requestBody:
content:
application/json:
schema:
properties:
framerate:
description: Recording framerate in fps. Values above 20 require GPU to be enabled on the browser session.
maximum: 60
minimum: 1
type: integer
max_duration_in_seconds:
description: Maximum recording duration in seconds.
minimum: 1
type: integer
record_audio:
default: false
description: Record audio in addition to video. When false (the default), the recording is video-only.
type: boolean
type: object
required: false
responses:
'201':
content:
application/json:
schema:
$ref: '#/components/schemas/BrowserReplay'
description: Recording started successfully.
'400':
$ref: '#/components/responses/BadRequest'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'409':
$ref: '#/components/responses/Conflict'
'500':
$ref: '#/components/responses/InternalError'
security:
- bearerAuth: []
summary: Start a browser session replay recording
tags:
- Browser Replays
/browsers/{id_or_name}/replays/{replay_id}:
get:
description: Download or stream the specified replay recording.
operationId: getBrowsersReplaysById
parameters:
- description: Browser session ID or name
example: htzv5orfit78e1m2biiifpbv
in: path
name: id_or_name
required: true
schema:
type: string
- description: Replay recording identifier
in: path
name: replay_id
required: true
schema:
type: string
responses:
'200':
content:
video/mp4:
schema:
format: binary
type: string
description: Replay recording retrieved successfully.
'202':
description: Replay recording is still in progress, please try again later
headers:
Retry-After:
description: Suggested wait time in seconds before retrying
schema:
minimum: 1
type: integer
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'500':
$ref: '#/components/responses/InternalError'
security:
- bearerAuth: []
summary: Download a replay recording
tags:
- Browser Replays
/browsers/{id_or_name}/replays/{replay_id}/stop:
post:
description: Stop the specified replay recording and persist the video.
operationId: stopBrowserReplayRecording
parameters:
- description: Browser session ID or name
example: htzv5orfit78e1m2biiifpbv
in: path
name: id_or_name
required: true
schema:
type: string
- description: Replay recording identifier
in: path
name: replay_id
required: true
schema:
type: string
responses:
'200':
description: Recording stopped successfully.
'400':
$ref: '#/components/responses/BadRequest'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'500':
$ref: '#/components/responses/InternalError'
security:
- bearerAuth: []
summary: Stop a browser session replay recording
tags:
- Browser Replays
components:
responses:
BadRequest:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Bad Request – invalid input
NotFound:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Resource not found
Conflict:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Conflict – resource already exists
InternalError:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Internal Server Error
Forbidden:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Forbidden – insufficient permissions or plan
Unauthorized:
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
description: Unauthorized – missing or invalid authorization token
schemas:
ErrorDetail:
properties:
code:
description: Lower-level error code providing more specific detail
example: invalid_input
type: string
message:
description: Further detail about the error
example: Provided version string is not semver compliant
type: string
type: object
Error:
properties:
code:
description: Application-specific error code (machine-readable)
example: bad_request
type: string
details:
description: Additional error details (for multiple errors)
items:
$ref: '#/components/schemas/ErrorDetail'
type: array
inner_error:
$ref: '#/components/schemas/ErrorDetail'
message:
description: Human-readable error description for debugging
example: 'Missing required field: app_name'
type: string
required:
- code
- message
type: object
BrowserReplay:
description: Information about a browser replay recording.
properties:
finished_at:
description: Timestamp when replay finished
format: date-time
nullable: true
type: string
replay_id:
description: Unique identifier for the replay recording.
type: string
replay_view_url:
description: URL for viewing the replay recording.
example: https://api.onkernel.com/browser/replays?jwt=eyJ0eXAi...&replay_id=7e2c1a9f-1234-4cde-9abc-ffeedd001122
type: string
started_at:
description: Timestamp when replay started
format: date-time
nullable: true
type: string
required:
- replay_id
type: object
securitySchemes:
bearerAuth:
scheme: bearer
type: http
x-service-info:
categories:
- browsers
docs:
apiReference: https://www.kernel.sh/docs
homepage: https://www.kernel.sh
llms: https://api.onkernel.com/llms.txt
x-provenance:
method: harvested
publisher: Kernel
source: https://api.onkernel.com/openapi.json
note: split by refine-openapis from the provider's own published document, verified by fetch (openapi/_original/*.fetch.json);
stamped by stamp-openapi-provenance.py (roadmap#793)