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PUT
Update Campaign
If you use an account key as a marketer, choose an existing sender and Reply-To profile. A request that needs a new profile returns 400 before creating profiles, labels, or campaign/sequence changes. This also applies to email steps and inserted sequence branches. An owner or admin can add the identity first; a step-level display-name override can still use an existing profile.
Update a draft campaign. You can change the campaign name, subject, labels, HTML body, Sequenzy block content, Style > Format, campaign data, computed lists, audience, From profile, Reply-To profile, or Send Time Optimization. Direct addresses create a backing profile when needed. STO is campaign-only; sequences use sendingWindow.

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Request

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string
required
Campaign ID.
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string
Updated campaign name.
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string
Updated email subject line.
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string
Updated inbox preview text. Send null to clear it.
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string
Alias for previewText.
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string
Campaign tracking code available to UTM templates as {{campaign.trackingCode}}. Send an empty string or null to clear it.
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string
Updated HTML body. Sequenzy converts this into email blocks.
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array
Updated Sequenzy email blocks. Use this instead of html when you need editor-compatible content or conditional blocks. Do not send both html and blocks in the same request. Put block styling under styles; top-level style keys like backgroundColor, backgroundOpacity, textColor, textAlign, borderColor, borderWidth, and borderRadius are normalized into styles.
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string
Change Style > Format to branded or minimal without rewriting the campaign copy. Supported for native Sequenzy blocks, including supported custom HTML blocks, but not a standalone raw HTML email; do not combine it with html. Applying minimal removes standalone logo blocks. Switching back to branded generates a new logo unless you send the authored logo block again in blocks.
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object
Replacement campaign audience, using the same shapes as create. Send null to clear saved targeting and pick the audience when you schedule. Omit it to leave the saved audience unchanged. Mutually exclusive with segmentId and listIds.
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string
Shorthand for retargeting the draft at one saved segment, equivalent to {"type": "segment", "segmentId": "seg_123"}. Mutually exclusive with targetLists and listIds.
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array
Shorthand for retargeting the draft at one or more lists, equivalent to {"type": "lists", "listIds": ["list_123"]}. Mutually exclusive with targetLists and segmentId.
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boolean
Deliver each recipient at their predicted best open hour within sendTimeWindowHours of scheduledAt. Campaign-only: there is no company or sequence STO toggle. Sequences use sendingWindow instead. Persists on the draft until schedule overrides it. spreadOverHours and sendInRecipientTimezone each turn STO off.
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integer
STO delivery window in hours from scheduledAt (1-24, default 12). Only used when sendTimeOptimization is true.
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integer | null
Send to at most this many audience members (1-10,000,000). The first N matching subscribers, ordered by subscriber id, receive the campaign after every audience and suppression rule is applied. Persists on the draft until Schedule Campaign overrides it. Send null to remove the limit. Out-of-range values return 400.
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array
Replacement label names. Send an empty array to clear labels. Missing labels are created automatically. The API also accepts label as a compatibility alias.
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string
Reply-To email address for this campaign. Use this or replyProfileId, not both.
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string
Display name for the Reply-To address. Requires replyTo; omit it when you send replyProfileId, which already carries its own display name. An address carries one Reply-To name company-wide: if replyTo already has a saved profile under a different name, that saved name is kept and the response warnings array says so.
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string
Reply profile ID for this company. It already supplies both the Reply-To address and the display name, so send it on its own and omit replyTo and replyToName.
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string
From address for this campaign. Its domain must be configured and verified. Use this or senderProfileId, not both.
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string
Display name recipients see, e.g. Brennon at TradeTally. Selects the sender identity of that name on fromEmail, creating it when the address has no identity by that name; the mailbox’s other display names, and everything pinned to them, are untouched. Requires fromEmail; omit it when you send senderProfileId, which already carries its own display name.
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string
Existing sender profile ID. It already supplies both the From address and the display name, so send it on its own and omit fromEmail and fromName.
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array
Up to 10 addresses CC’d on every recipient’s email for this campaign. Send an empty array or null to clear them. The recipient themselves is never copied.
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array
Up to 10 addresses BCC’d on every recipient’s email for this campaign. Send an empty array or null to clear them.
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object | null
Campaign-scoped JSON data. For example, upload an events array that this campaign can use while rendering repeat blocks. Supports up to 500 items per top-level array. Send null to clear it; omit it to keep the current data.
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array
Personalized list definitions that select items from campaignData using subscriber attributes. Templates can repeat over each list’s key; keys use letters, numbers, underscores, and dots only. Use maxItems to cap how many items each subscriber can receive in that list.

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Responses

Explicit targetLists.includedSubscriberIds override exclusions. To remove a contact from a frozen group, remove its ID from that array.