Fill the blank

One sentence with a gap in it and two to five words that could fill it: the options flick through the gap one after another, slow down, stop, and the right one clicks in and lights, the others stepping back, then why it is the one: 9 to 12 seconds. In twelve styles, each wearing your brand's colours, fonts, logo, presenter and background.

Template id	tpl_726bca158ba0
Markets	Every market
Variants	Corporate glass, Bento grid, Broadcast news, Editorial, Swiss grid, Neo-brutalist, Soft friendly, Sticker, Type specimen, Glitch cut, Hand marks, Outline
Ready-made feeds	None

Use cases

• A sentence with a gap for your audience to guess: a saving habit, a slogan, a date that matters.
• Two to five options flick through the gap until the right one clicks in.
• Why it is the one, in a line under it.

Variants

A variant is this template drawn another way, and it comes in versions: immutable builds, the newest first. A channel follows the newest version of its variant, unless it is pinned to one.

Variant	What it is	Versions	Newest
Corporate glass	Frosted glass cards over an aurora in your brand colours: calm and premium.	1	1.0.0
Bento grid	Rounded tiles in your brand colours, each moving on its own: a modern product look.	1	1.0.0
Broadcast news	A news channel in your colours: channel bug, lower third, ticker and your presenter.	1	1.0.0
Editorial	A magazine page in your paper tone and serif: masthead, hairline rules and a byline.	1	1.0.0
Swiss grid	A strict grid, large type and your brand colour as the one accent. Nothing bounces.	1	1.0.0
Neo-brutalist	Loud flat blocks in your colours with thick borders and hard shadows.	1	1.0.0
Soft friendly	Soft shapes and rounded cards in tints of your brand colour: warm and approachable.	1	1.0.0
Sticker	Die-cut stickers in your colours: white edges and hard shadows, slapped on at a tilt and peeled off at a page turn.	1	1.0.0
Type specimen	Your typeface as the picture: huge tight type on flat bands of your colours, a word cropped by the frame.	1	1.0.0
Glitch cut	A dark page cut on the beat: heavy type sliced in, a split of your colours at every cut.	1	1.0.0
Hand marks	A clean page with a marker in your colours: loops, underlines and ticks drawn on over clean type.	1	1.0.0
Outline	Everything drawn as a line in your colours: outlined cards and bars that draw themselves on, only what matters filled solid.	1	1.0.0

What it accepts

Every variant takes the same content, so one document draws in any of them.

Fill the blank: one sentence with a gap in it and two to five words that could fill it, the options flicking through the gap until the right one clicks in and lights, then why it is the one. metaData is the post's title, descriptions and hashtags and is never drawn.

Field	Type	Required	Limit	What it is
clipData	group	yes		Clip data: Everything drawn: the title, the sentence on either side of its gap, the options, which one is right, why, the source and the look.
clipData.kicker	text		up to 20 characters	Kicker: A word or two above the title, such as QUICK QUIZ.
clipData.title	text	yes	up to 80 characters	Title: What to do, such as Can you fill the gap? Shown from the first frame.
clipData.before	text		up to 90 characters	Before the gap: The words of the sentence before its gap. Left out, the sentence starts with the gap.
clipData.after	text		up to 90 characters	After the gap: The words of the sentence after its gap. Left out, the sentence ends with the gap.
clipData.options	list	yes	at least 2, up to 5	Options: Two to five words or short phrases that could fill the gap, in the order they are shown. Each adds a second.
clipData.options[]	group			Option
clipData.options[].text	text	yes	up to 24 characters	Option
clipData.answer	integer	yes	from 1, to 5	Right option: Which option fills the gap, counting from 1 for the first. Nothing about it differs until it clicks in. A number past the last option lights none.
clipData.line	text		up to 120 characters	Why: Why it is the one, shown once it clicks in. Left out, the clip ends on the answer.
clipData.source	text		up to 70 characters	Source: Where it comes from, at the foot. Drawn exactly as written.
clipData.styleWords	group			Style words: The few words some styles write into their own frame, each drawn exactly as written, in the language you write it in. A word left out is not drawn: no template adds a word of its own. The same keys in every format of the collections; each style draws only its own.
clipData.styleWords.live	text		up to 16 characters	Live marker (Broadcast news): Written beside the light in Broadcast news' channel bug, such as LIVE. Left out, the light stands alone.
clipData.styleWords.byline	text		up to 12 characters	Byline (Editorial): Written before the presenter's name in Editorial, such as By. Left out, the name stands alone.
clipData.styleWords.functionKeys	list		up to 4	Function keys (Data terminal): Data terminal's row of keys F1 to F4, one word each, in order, such as HELP, DATA, CHART and NEWS; the second is drawn held down, and a key that does not fit the row is left out. Left out, no keys are drawn.
clipData.styleWords.functionKeys[]	text		up to 12 characters	Key
clipData.styleWords.commandKey	text		up to 10 characters	Command key (Data terminal): The key at the end of Data terminal's row, in the rise colour, such as GO. Left out, none is drawn.
clipData.styleWords.realTime	text		up to 12 characters	Real-time light (Data terminal): Written beside the blinking light in Data terminal's status bar, such as RT. Left out, the light stands alone.
clipData.styleWords.messageLabel	text		up to 12 characters	Message window label (Data terminal): The tab on Data terminal's message window round the presenter, such as MSG. Left out, the window has no tab.
clipData.styleWords.pictureLabel	text		up to 12 characters	Picture panel label (Data terminal): Written in the strip along the top of Data terminal's picture panels, such as IMG. Left out, the strip stays empty.
clipData.look	group			Look: How the clip looks and moves within its style. The same switches in every format of the collections. Leave a switch out, or set it to the style's own, and the style decides.
clipData.look.theme	enum		auto, brand, light, dark, bold	Theme: The style's own choice; your brand's own colours and background; a light or dark page tinted with your brand colour; or your brand colour as the page.
clipData.look.pace	enum		auto, calm, standard, punchy	Pace: How things arrive: the style's own rhythm, calm fades, a standard rhythm, or punchy slams and cuts.
clipData.look.corners	enum		auto, square, soft, round	Corners: The shape of cards, panels and marks.
clipData.look.align	enum		auto, start, centre	Text alignment: Where the text lines up.
clipData.look.logo	enum		auto, free	Logo: The style's own: the logo on the style's plate (a card, a disc, a badge) so it reads on any page. As it is: the logo whole, with no plate, frame or crop, for a logo made to stand on the page, such as one with a transparent background. As it is, make sure your logo reads on the page of the theme you choose.
clipData.look.logoSize	enum		auto, small, large	Logo size: Standard is the style's own size. Small draws the logo a fifth smaller, with its plate. Large draws it a quarter larger wherever the style has room for it, and at the standard size where it has none.
clipData.look.hideHeader	boolean			Hide logo and title: Leaves out the line at the top of the clip: your logo, the title line and the style's decoration around them, so the content starts at the top. To leave it out of every clip, switch Logo and title line off in your brand's settings.
clipData.look.hideFooter	boolean			Hide footer line: Leaves out your footer line at the foot of the clip, with whatever the style draws only to carry it, so the content reaches further down. Your presenter and the source line stay. To leave it out of every clip, switch Footer line off in your brand's settings.
clipData.look.pattern	enum		auto, none, dots, grid, lines	Background pattern: The fine texture behind the content. The style's own keeps what the style draws there, and some styles draw none. None leaves the background plain. Dots, Grid and Diagonal lines draw that pattern faintly instead, the same in every style, in the colour of your page.
metaData	group			Meta data: Everything about the post that is never drawn in the clip: its title, its description in four lengths, one per kind of platform, and its hashtags. Reelwire adds the brand's description, link and hashtags after it. Left out, the post text is generated from the clip data.
metaData.title	text		up to 100 characters	Title: Used where the platform has a title of its own: Facebook Feed, LinkedIn, Pinterest and YouTube. Up to 100 characters, which every one of them takes.
metaData.captionTiny	text		up to 200 characters	Tiny description (Pinterest, Threads, X): Up to 200 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionShort	text		up to 500 characters	Short description (Telegram, Threema, WeChat, WhatsApp): Up to 500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionMedium	text		up to 1500 characters	Medium description (Discord, Facebook Reels, Instagram, LinkedIn, Signal, Slack, TikTok): Up to 1500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionLong	text		up to 4000 characters	Long description (Facebook Feed, YouTube): Up to 4000 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.hashtags	list		up to 15	Hashtags: Written without the #. Up to 15, which every platform takes.
metaData.hashtags[]	text		up to 60 characters	Hashtag

locales carries other languages: under each language code, the parts of clipData and metaData that differ, laid over the default, so a language with no copy still renders.

A picture is always a file from your media library: media:// followed by its id or its name. Anything the table does not list is refused, and so is anything over its limit, with a 400 schema_validation error that names the field.

Ask Reelwire for the whole JSON Schema, the document your content is checked against, without signing in:

curl "https://app.reelwire.io/v1/formats/template/tpl_726bca158ba0?variant=Corporate%20glass&version=1.0.0"

Delivery JSON

Your own system sends this to one of your streams, POST /v1/stream, and every channel listening to that stream draws it with its template. data is the document described above; a stream with an empty field map passes it to the template unchanged. Try it first on POST /v1/stream/validate, which answers the same without publishing anything. Streams and feeds explains the rest, including how to map a document of your own shape instead.

{
  "streamId": "st_your_stream_id",
  "eventId": "01M2SQMKK3G1NVFXV31DCBVB95",
  "occurredAt": "2026-09-23T07:00:00Z",
  "locale": "en",
  "data": {
    "clipData": {
      "kicker": "Money basics",
      "title": "Can you fill the gap?",
      "before": "Paying yourself first means saving",
      "after": "you spend anything else that month.",
      "options": [
        {
          "text": "after"
        },
        {
          "text": "before"
        },
        {
          "text": "while"
        }
      ],
      "answer": 2,
      "line": "Move the money to savings on payday, before the month gets a say in it.",
      "source": "Kite money guide",
      "styleWords": {
        "live": "LIVE",
        "byline": "By",
        "functionKeys": [
          "HELP",
          "DATA",
          "CHART",
          "NEWS"
        ],
        "commandKey": "GO",
        "realTime": "RT",
        "messageLabel": "MSG",
        "pictureLabel": "IMG"
      },
      "look": {
        "theme": "auto",
        "pace": "auto",
        "corners": "auto",
        "align": "auto",
        "logo": "auto",
        "logoSize": "auto",
        "hideHeader": false,
        "hideFooter": false,
        "pattern": "auto"
      }
    },
    "metaData": {
      "title": "Can you fill the gap?",
      "captionTiny": "Paying yourself first means saving before you spend anything else that month. Did you get it?",
      "captionShort": "Can you fill the gap? Paying yourself first means saving before you spend anything else that month. Move the money to savings on payday, before the month gets a say in it.",
      "captionMedium": "Can you fill the gap?\n\n\"Paying yourself first means saving ___ you spend anything else that month.\"\n\nThe answer: before. Move the money to savings on payday, before the month gets a say in it.\n\nHow did you do? Tell us in the comments.",
      "captionLong": "Can you fill the gap?\n\n\"Paying yourself first means saving ___ you spend anything else that month.\"\n\nAfter, before or while? The answer is before.\n\nPaying yourself first is one of the simplest saving habits there is: on payday, a set amount goes into savings straight away, and the rest of the month works with what is left. Saving what is left at the end of the month rarely works, because there is rarely anything left.\n\nSet up a standing order for the day your salary arrives and it happens without you thinking about it.\n\nHow did you do? Tell us in the comments.",
      "hashtags": [
        "moneytips",
        "saving",
        "quiz",
        "fintech",
        "kite"
      ]
    }
  }
}

The delivery names no version: which build draws it is the channel's choice, the newest of its variant or the one it is pinned to. eventId is a ULID you make once per event: sending the same one again changes nothing. occurredAt is when the thing happened, not when you sent it. locale is the language of the text in data, and data.locales carries other languages beside it.