Change the words painted over a frame of a stored previs, where they sit or the label behind them, without buying anything: the drawing stays and the card repaints. Reach for it when the person wants another line on a frame, one of its other_words or their own, or wants the words moved or boxed, on any frame of a hooks previs or a storyboard. Name only the frames that change; a frame you leave out keeps its words. Every call records a revision; from_revision brings an earlier revision back instead of naming frames. Show kind previs with this whole response so the repainted frame appears.
curl --request POST \
--url https://dally.ai/v1/previs.reword \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"frames": [
{
"index": 0,
"on_screen": "Font first, filming second",
"place": "upper",
"box": "black"
}
],
"expected_revision": 1
}
'import requests
url = "https://dally.ai/v1/previs.reword"
payload = {
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"frames": [
{
"index": 0,
"on_screen": "Font first, filming second",
"place": "upper",
"box": "black"
}
],
"expected_revision": 1
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
previs_id: 'bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1',
frames: [
{
index: 0,
on_screen: 'Font first, filming second',
place: 'upper',
box: 'black'
}
],
expected_revision: 1
})
};
fetch('https://dally.ai/v1/previs.reword', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://dally.ai/v1/previs.reword",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'previs_id' => 'bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1',
'frames' => [
[
'index' => 0,
'on_screen' => 'Font first, filming second',
'place' => 'upper',
'box' => 'black'
]
],
'expected_revision' => 1
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://dally.ai/v1/previs.reword"
payload := strings.NewReader("{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://dally.ai/v1/previs.reword")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://dally.ai/v1/previs.reword")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}"
response = http.request(request)
puts response.read_body{
"request_id": "req_previs_example",
"previs": {
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"kind": "hooks",
"title": "The plan that made me stop filming",
"format": "9:16",
"frames": [
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Font first, filming second",
"other_words": [
"Font first, filming second",
"Day three of the font"
],
"seconds": 4,
"place": "upper",
"box": "black",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "The plan had a font",
"other_words": [
"I named the font before the reel",
"Serif, then silence"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Nothing filmed, one font picked",
"other_words": [
"The font is done",
"Ask me about the font"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Filming is next week",
"other_words": [
"The font ships today",
"Done choosing"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
}
],
"receipts": [],
"status": "ready",
"picked_index": null,
"revision": 2,
"revisions": [
{
"revision": 1,
"made_by": "chat",
"what": "Four hooks authored",
"forked_from": null,
"created_at": "2026-09-10T19:00:00.000Z",
"frames": [
{
"on_screen": "Still choosing the font",
"place": "lower",
"box": "none"
},
{
"on_screen": "The plan had a font",
"place": "lower",
"box": "none"
},
{
"on_screen": "Nothing filmed, one font picked",
"place": "lower",
"box": "none"
},
{
"on_screen": "Filming is next week",
"place": "lower",
"box": "none"
}
]
}
],
"result": {
"image_url": "https://media.withdally.com/generated/previs/7d3f2a1b-4c5e-4f6a-8b9c-0d1e2f3a4b5c/bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1.png",
"width": 864,
"height": 1536,
"artist": "openai/gpt-image-2",
"quality": "low",
"provider": "openrouter",
"cost_usd": 0.04,
"latency_ms": 21000,
"provider_request_id": null,
"usage": {}
},
"error": null,
"created_at": "2026-09-10T19:00:00.000Z"
},
"show": {
"kind": "previs"
}
}{
"error": {
"code": "invalid_request",
"message": "<string>",
"details": {}
},
"request_id": "<string>"
}previs
previs.reword
Access: public. Send a JSON body; unknown keys are rejected with 400 invalid_request (inputs are strict). Responses may gain fields additively — never remove or repurpose; ignore unknown response fields.
POST
/
v1
/
previs.reword
Change the words painted over a frame of a stored previs, where they sit or the label behind them, without buying anything: the drawing stays and the card repaints. Reach for it when the person wants another line on a frame, one of its other_words or their own, or wants the words moved or boxed, on any frame of a hooks previs or a storyboard. Name only the frames that change; a frame you leave out keeps its words. Every call records a revision; from_revision brings an earlier revision back instead of naming frames. Show kind previs with this whole response so the repainted frame appears.
curl --request POST \
--url https://dally.ai/v1/previs.reword \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"frames": [
{
"index": 0,
"on_screen": "Font first, filming second",
"place": "upper",
"box": "black"
}
],
"expected_revision": 1
}
'import requests
url = "https://dally.ai/v1/previs.reword"
payload = {
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"frames": [
{
"index": 0,
"on_screen": "Font first, filming second",
"place": "upper",
"box": "black"
}
],
"expected_revision": 1
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
previs_id: 'bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1',
frames: [
{
index: 0,
on_screen: 'Font first, filming second',
place: 'upper',
box: 'black'
}
],
expected_revision: 1
})
};
fetch('https://dally.ai/v1/previs.reword', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://dally.ai/v1/previs.reword",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'previs_id' => 'bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1',
'frames' => [
[
'index' => 0,
'on_screen' => 'Font first, filming second',
'place' => 'upper',
'box' => 'black'
]
],
'expected_revision' => 1
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://dally.ai/v1/previs.reword"
payload := strings.NewReader("{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://dally.ai/v1/previs.reword")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://dally.ai/v1/previs.reword")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"previs_id\": \"bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1\",\n \"frames\": [\n {\n \"index\": 0,\n \"on_screen\": \"Font first, filming second\",\n \"place\": \"upper\",\n \"box\": \"black\"\n }\n ],\n \"expected_revision\": 1\n}"
response = http.request(request)
puts response.read_body{
"request_id": "req_previs_example",
"previs": {
"previs_id": "bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1",
"kind": "hooks",
"title": "The plan that made me stop filming",
"format": "9:16",
"frames": [
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Font first, filming second",
"other_words": [
"Font first, filming second",
"Day three of the font"
],
"seconds": 4,
"place": "upper",
"box": "black",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "The plan had a font",
"other_words": [
"I named the font before the reel",
"Serif, then silence"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Nothing filmed, one font picked",
"other_words": [
"The font is done",
"Ask me about the font"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
},
{
"say": "I spent longer choosing a font than filming.",
"see": "The creator closes a laptop at a kitchen table, looking quietly amused.",
"on_screen": "Filming is next week",
"other_words": [
"The font ships today",
"Done choosing"
],
"seconds": 4,
"place": "lower",
"box": "none",
"borrowed_from": []
}
],
"receipts": [],
"status": "ready",
"picked_index": null,
"revision": 2,
"revisions": [
{
"revision": 1,
"made_by": "chat",
"what": "Four hooks authored",
"forked_from": null,
"created_at": "2026-09-10T19:00:00.000Z",
"frames": [
{
"on_screen": "Still choosing the font",
"place": "lower",
"box": "none"
},
{
"on_screen": "The plan had a font",
"place": "lower",
"box": "none"
},
{
"on_screen": "Nothing filmed, one font picked",
"place": "lower",
"box": "none"
},
{
"on_screen": "Filming is next week",
"place": "lower",
"box": "none"
}
]
}
],
"result": {
"image_url": "https://media.withdally.com/generated/previs/7d3f2a1b-4c5e-4f6a-8b9c-0d1e2f3a4b5c/bc3c7b36-7ac7-433d-82ef-58bc2d1fe1d1.png",
"width": 864,
"height": 1536,
"artist": "openai/gpt-image-2",
"quality": "low",
"provider": "openrouter",
"cost_usd": 0.04,
"latency_ms": 21000,
"provider_request_id": null,
"usage": {}
},
"error": null,
"created_at": "2026-09-10T19:00:00.000Z"
},
"show": {
"kind": "previs"
}
}{
"error": {
"code": "invalid_request",
"message": "<string>",
"details": {}
},
"request_id": "<string>"
}Authorizations
bearerAuthapiKeyAuth
A WorkOS-dashboard-issued internal API key on Authorization: Bearer.
Body
application/json
The Previs id returned by previs.create.
Pattern:
^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$The frames that change, each with any of the words, the place and the box. Omit when from_revision brings an earlier revision back.
Required array length:
1 - 4 elementsShow child attributes
Show child attributes
Bring this earlier revision's frames back as a new revision, instead of naming frames.
Required range:
x >= 1The revision you last read; the write is refused as stale when the previs has moved on. Omit to write regardless.
Required range:
x >= 1What changed, in your words, kept on the revision; Dally writes one when omitted.
Maximum string length:
200chat when you call it from the conversation; the card sends card for the person's own tap.
Available options:
chat, card Response
Success. request_id is present on every response.
The stored previs and its current state; dally_show kind previs takes this whole response.
Show child attributes
Show child attributes
How it is shown: dally_write renders this kind on this very answer with this whole response as its data, so the creator already sees it; do not render it again.
Show child attributes
Show child attributes
Server-minted id for this request. Present on every response, success and error — quote it when reporting a problem.
Minimum string length:
1