Save the content as a new version (autosave)

PUT

/api/v1/workspaces/{workspace}/campaigns/{campaignId}/content

curl --request PUT \
  --url https://reputecast.example.com/api/v1/workspaces/acme-newsletter/campaigns/2489E9AD-2EE2-8E00-8EC9-32D5F69181C0/content \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{ "abTest": { "bestTime": true, "durationHours": 1, "kind": "subject", "metric": "human_opens", "testPercent": 1, "variants": [ { "html": "example", "key": "A", "mjml": "example", "preheader": "example", "sendTime": "example", "subject": "example" } ], "winner": "example" }, "baseVersion": 1, "force": true, "html": "example", "label": "example", "mjml": "example", "preheader": "example", "source": "autosave", "subject": "example" }'

• Your ReputeCast public URL

Permission: campaigns:edit

Fails with 409 version_conflict when someone saved a newer version since baseVersion; the problem’s meta says who, when and which sections each side changed. Send force: true to keep yours on top.

Authorizations

• bearer

Parameters

Path Parameters

workspace

required

Workspace slug

string

/^[a-z0-9][a-z0-9-]{1,62}$/

Workspace slug

campaignId

required

string format: uuid

Query Parameters

language

Save a language version (its code, such as de); empty saves the source

string

<= 16 characters

Save a language version (its code, such as de); empty saves the source

Request Body^required

Media typeapplication/json

object

abTest

object

bestTime

boolean

durationHours

required

integer format: int64

>= 1 <= 72

kind

required

string

Allowed values: subject content send_time

metric

required

string

Allowed values: human_opens clicks manual

testPercent

required

Share of the audience in the test

integer format: int64

>= 5 <= 50

variants

required

Array<object>

>= 2 items <= 3 items

object

html

string

<= 2000000 characters

key

required

Variant A is the campaign itself

string

Allowed values: A B C

mjml

string

<= 2000000 characters

preheader

string

<= 500 characters

sendTime

string

/^([01]\d|2[0-3]):[0-5]\d$/

subject

string

<= 998 characters

winner

string

baseVersion

required

integer format: int64

>= 1

force

boolean

html

string

<= 2500000 characters

label

string

<= 200 characters

mjml

string

<= 2000000 characters

preheader

string

<= 500 characters

source

string

default: autosave

Allowed values: autosave manual import template

subject

string

<= 998 characters

Responses

200

OK

Media typeapplication/json

object

contentHash

required

string

html

required

string

plainText

required

string

savedAt

required

string format: date-time

sizeBytes

required

integer format: int64

version

required

integer format: int64

Example ^generated

{
  "contentHash": "example",
  "html": "example",
  "plainText": "example",
  "savedAt": "2026-04-15T12:00:00Z",
  "sizeBytes": 1,
  "version": 1
}

default

Error

Media typeapplication/problem+json

object

code

Stable error code, e.g. permission_denied

string

detail

A human-readable explanation specific to this occurrence of the problem.

string

errors

Optional list of individual error details

Array<object>

object

location

Where the error occurred, e.g. ‘body.items[3].tags’ or ‘path.thing-id’

string

message

Error message text

string

value

The value at the given location

helpers

Members who hold the missing permission

Array<string>

instance

A URI reference that identifies the specific occurrence of the problem.

string format: uri

meta

object

key

additional properties

permission

The missing permission key

string

status

HTTP status code

integer format: int64

title

A short, human-readable summary of the problem type. This value should not change between occurrences of the error.

string

type

A URI reference to human-readable documentation for the error.

string format: uri

default: about:blank

Example

{
  "detail": "Property foo is required but is missing.",
  "instance": "https://example.com/error-log/abc123",
  "status": 400,
  "title": "Bad Request",
  "type": "about:blank"
}