Generate videos from text or images via Kling 2.x/3.x, LTX 2.x, Veo 3.x, Seedance, Hailuo, and Stable Video Diffusion motion models. Three endpoints cover image-to-video, text-to-video, and SVD motion. Jobs are asynchronous; poll the variation/motion endpoints or use a webhook for completion.
{
"openapi": "3.0.0",
"info": {
"title": "Leonardo.AI Video Generation API",
"description": "Generate videos from text or images using Kling, LTX, Veo, Seedance, Hailuo and Stable Video Diffusion motion models. Supports image-to-video, text-to-video, and SVD motion.",
"version": "v1.0.0",
"contact": {
"name": "Leonardo.AI Support",
"url": "https://docs.leonardo.ai/docs/need-more-support"
},
"license": {
"name": "Leonardo.AI Terms of Service",
"url": "https://leonardo.ai/terms-of-service/"
}
},
"servers": [
{
"url": "https://cloud.leonardo.ai/api/rest/v1",
"description": "Leonardo.AI Production API"
}
],
"tags": [
{
"name": "Motion"
}
],
"paths": {
"/generations-motion-svd": {
"post": {
"tags": [
"Motion"
],
"summary": "Create SVD Motion Generation",
"description": "This endpoint will generate a SVD motion generation.",
"operationId": "createSVDMotionGeneration",
"requestBody": {
"content": {
"application/json": {
"schema": {
"properties": {
"imageId": {
"nullable": false,
"title": "String",
"type": "string",
"description": "The ID of the image, supports generated images, variation images, and init images."
},
"isPublic": {
"$ref": "#/components/schemas/public"
},
"isInitImage": {
"$ref": "#/components/schemas/isInitImage"
},
"isVariation": {
"$ref": "#/components/schemas/isVariation"
},
"motionStrength": {
"$ref": "#/components/schemas/motionStrength"
}
},
"type": "object",
"required": [
"imageId"
]
}
}
},
"description": "Query parameters can also be provided in the request body as a JSON object",
"required": false
},
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"motionSvdGenerationJob": {
"nullable": true,
"properties": {
"generationId": {
"nullable": false,
"title": "String",
"type": "string"
},
"apiCreditCost": {
"$ref": "#/components/schemas/apiCreditCost"
},
"cost": {
"$ref": "#/components/schemas/cost"
}
},
"title": "MotionSvdGenerationOutput",
"type": "object"
}
}
},
"example": {
"motionSvdGenerationJob": {
"generationId": "h7i8j9k0-l1m2-n3o4-pqrs-tu6789012345",
"apiCreditCost": null,
"cost": {
"amount": "0.0147",
"unit": "DOLLARS"
}
}
}
}
},
"description": "Responses for POST /generations-motion-svd"
}
}
}
},
"/generations-image-to-video": {
"post": {
"tags": [
"Motion"
],
"summary": "Create a video generation from an image",
"description": "This endpoint will generate a video using an uploaded or generated image.",
"operationId": "createImageToVideoGeneration",
"requestBody": {
"content": {
"application/json": {
"schema": {
"properties": {
"prompt": {
"nullable": false,
"title": "String",
"type": "string",
"description": "The prompt used to generate video"
},
"imageId": {
"nullable": false,
"title": "String",
"type": "string",
"description": "The ID of the image, supports generated images and init images. Use only image or imageId with imageType."
},
"imageType": {
"type": "string",
"nullable": false,
"enum": [
"GENERATED",
"UPLOADED"
],
"description": "Type indicating whether the init image is uploaded or generated. Use only image or imageId with imageType."
},
"endFrameImage": {
"nullable": true,
"title": "Object",
"type": "object",
"description": "The end frame image. Supported only on kling2_1 model when used in conjunction with an init image.",
"properties": {
"id": {
"nullable": false,
"title": "String",
"type": "string",
"description": "The ID of the end frame image."
},
"type": {
"nullable": false,
"title": "String",
"type": "string",
"enum": [
"GENERATED",
"UPLOADED"
],
"description": "Type indicating whether the end frame image is uploaded or generated."
}
},
"required": [
"id",
"type"
]
},
"resolution": {
"nullable": true,
"title": "String",
"enum": [
"RESOLUTION_480",
"RESOLUTION_720",
"RESOLUTION_1080"
],
"description": "The resolution of the output video. Acceptable values vary based on model"
},
"model": {
"nullable": true,
"title": "String",
"enum": [
"MOTION2",
"VEO3",
"MOTION2FAST",
"VEO3FAST",
"KLING2_1",
"KLING2_5"
],
"description": "The model to use for the video generation. Defaults to MOTION2 if not specified.",
"default": "MOTION2"
},
"frameInterpolation": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "Smoothly blend frames for fluid video transitions using Interpolation."
},
"isPublic": {
"$ref": "#/components/schemas/public"
},
"seed": {
"type": "integer",
"nullable": true,
"title": "seed",
"description": "Apply a fixed seed to maintain consistency across generation sets. The maximum seed value is 2147483637 for Motion 2.0."
},
"negativePrompt": {
"nullable": true,
"title": "String",
"type": "string",
"description": "The negative prompt used for the video generation."
},
"promptEnhance": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "Whether to enhance the prompt."
},
"duration": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Duration of the output video in seconds. Allowed values: 4, 6, or 8 on models VEO3 and VEO3FAST (default: 8) and 5 or 10 on model KLING2_5 (default: 5)."
},
"promptEnhanceInstruction": {
"nullable": true,
"title": "String",
"type": "string",
"description": "A natural language instruction used to modify the main prompt. For example, 'make it cinematic', 'add a rainbow', or 'change the subject to a cat'."
},
"styleIds": {
"nullable": true,
"title": "Array of Strings",
"type": "array",
"items": {
"type": "string"
},
"description": "Predefined styles to enhance the prompt. This accepts a list of style uuids."
},
"elements": {
"nullable": true,
"title": "Array of Element Inputs",
"type": "array",
"items": {
"$ref": "#/components/schemas/element_input"
},
"description": "An array of elements/loras objects that will be applied sequentially to the output. Elements are only supported for Motion2.0 generations. "
},
"height": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Height of the output video. Acceptable values vary based on model"
},
"width": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Width of the output video. Acceptable values vary based on model"
}
},
"type": "object",
"required": [
"prompt",
"imageId",
"imageType"
]
}
}
},
"description": "Query parameters can also be provided in the request body as a JSON object",
"required": false
},
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"motionVideoGenerationJob": {
"nullable": true,
"properties": {
"generationId": {
"nullable": false,
"title": "String",
"type": "string"
},
"apiCreditCost": {
"$ref": "#/components/schemas/apiCreditCost"
},
"cost": {
"$ref": "#/components/schemas/cost"
}
},
"title": "MotionVideoGenerationOutput",
"type": "object"
}
}
},
"example": {
"motionVideoGenerationJob": {
"generationId": "i8j9k0l1-m2n3-o4p5-qrst-uv7890123456",
"apiCreditCost": null,
"cost": {
"amount": "0.0147",
"unit": "DOLLARS"
}
}
}
}
},
"description": "Responses for POST /generations-image-to-video"
}
}
}
},
"/generations-text-to-video": {
"post": {
"tags": [
"Motion"
],
"summary": "Create a video generation from a text prompt",
"description": "This endpoint will generate a video using a text prompt",
"operationId": "createTextToVideoGeneration",
"requestBody": {
"content": {
"application/json": {
"schema": {
"properties": {
"prompt": {
"nullable": false,
"title": "String",
"type": "string",
"description": "The prompt used to generate video"
},
"resolution": {
"nullable": true,
"title": "String",
"enum": [
"RESOLUTION_480",
"RESOLUTION_720",
"RESOLUTION_1080"
],
"description": "The resolution of the output video. Acceptable values vary based on model"
},
"model": {
"nullable": true,
"title": "String",
"enum": [
"MOTION2",
"VEO3",
"MOTION2FAST",
"VEO3FAST",
"KLING2_1",
"KLING2_5"
],
"description": "The model to use for the video generation. Defaults to MOTION2 if not specified.",
"default": "MOTION2"
},
"frameInterpolation": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "Smoothly blend frames for fluid video transitions using Interpolation."
},
"isPublic": {
"$ref": "#/components/schemas/public"
},
"seed": {
"type": "integer",
"nullable": true,
"title": "seed",
"description": "Apply a fixed seed to maintain consistency across generation sets. The maximum seed value is 2147483637 for Motion 2.0 and 4294967293 for Veo3."
},
"negativePrompt": {
"nullable": true,
"title": "String",
"type": "string",
"description": "The negative prompt used for the video generation."
},
"promptEnhance": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "Whether to enhance the prompt."
},
"promptEnhanceInstruction": {
"nullable": true,
"title": "String",
"type": "string",
"description": "A natural language instruction used to modify the main prompt. For example, 'make it cinematic', 'add a rainbow', or 'change the subject to a cat'."
},
"styleIds": {
"nullable": true,
"title": "Array of Strings",
"type": "array",
"items": {
"type": "string"
},
"description": "Predefined styles to enhance the prompt. This accepts a list of style uuids."
},
"height": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Height of the output video. Acceptable values vary based on model"
},
"width": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Width of the output video. Acceptable values vary based on model"
},
"duration": {
"nullable": true,
"title": "Integer",
"type": "integer",
"description": "Duration of the output video in seconds. Defaults to 8 seconds if not specified. Allowed values: 4, 6, or 8. Supported on models VEO3 and VEO3FAST.",
"default": 8
},
"elements": {
"nullable": true,
"title": "Array of Element Inputs",
"type": "array",
"items": {
"$ref": "#/components/schemas/element_input"
},
"description": "An array of elements/loras objects that will be applied sequentially to the output. Elements are only supported for Motion2.0 generations. "
}
},
"type": "object",
"required": [
"prompt"
]
}
}
},
"description": "Query parameters can also be provided in the request body as a JSON object",
"required": false
},
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"motionVideoGenerationJob": {
"nullable": true,
"properties": {
"generationId": {
"nullable": false,
"title": "String",
"type": "string"
},
"apiCreditCost": {
"$ref": "#/components/schemas/apiCreditCost"
},
"cost": {
"$ref": "#/components/schemas/cost"
}
},
"title": "MotionVideoGenerationOutput",
"type": "object"
}
}
},
"example": {
"motionVideoGenerationJob": {
"generationId": "j9k0l1m2-n3o4-p5q6-rstu-vw8901234567",
"apiCreditCost": null,
"cost": {
"amount": "0.0147",
"unit": "DOLLARS"
}
}
}
}
},
"description": "Responses for POST /generations-text-to-video"
}
}
}
}
},
"components": {
"schemas": {
"cost": {
"nullable": true,
"type": "object",
"title": "Cost",
"description": "The cost of the operation.",
"properties": {
"amount": {
"type": "string",
"description": "The amount of the cost."
},
"unit": {
"type": "string",
"enum": [
"CREDITS",
"DOLLARS"
],
"description": "The unit of the cost. Can be CREDITS or DOLLARS. Note: DOLLARS unit only supports PAYG plan."
}
}
},
"Cursor": {
"type": "string",
"title": "Cursor",
"description": "An opaque cursor used for pagination"
},
"Blueprint": {
"type": "object",
"title": "Blueprint",
"description": "A Blueprint object",
"properties": {
"akUUID": {
"type": "string",
"description": "Unique identifier for the Blueprint",
"example": "c846413e-92ba-4302-84f8-47c667d4761f"
},
"createdAt": {
"type": "string",
"format": "date-time",
"description": "Creation timestamp",
"example": "2025-10-29T21:31:47.999Z"
},
"updatedAt": {
"type": "string",
"format": "date-time",
"description": "Last update timestamp",
"example": "2025-12-19T02:34:44.740Z"
},
"name": {
"type": "string",
"description": "Name of the Blueprint",
"example": "Golden Hour Relight"
},
"description": {
"type": "string",
"description": "Description of the Blueprint",
"example": "Relight an image with warm, golden tones of late afternoon sunlight for a soft and radiant glow."
},
"thumbnails": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string",
"description": "Thumbnail type name (e.g., thumbnailUrl, videoUrl, thumbnailUrlBanner, thumbnailUrlLandscape, thumbnailUrlExtremePortrait)",
"example": "thumbnailUrl"
},
"url": {
"type": "string",
"description": "URL of the thumbnail",
"example": "https://cdn.leonardo.ai/blueprint_assets/official/384ab5c8-55d8-47a1-be22-6a274913c324/thumbnails/goldenhour.jpg"
}
}
}
},
"teamId": {
"type": "string",
"nullable": true,
"description": "Team ID if Blueprint belongs to a team",
"example": null
},
"official": {
"type": "boolean",
"description": "Whether this is an official Blueprint",
"example": true
}
}
},
"BlueprintVersion": {
"type": "object",
"title": "BlueprintVersion",
"description": "A Blueprint Version object",
"properties": {
"edges": {
"type": "array",
"items": {
"type": "object",
"properties": {
"cursor": {
"type": "string",
"example": "eyJjcmVhdGVkQXQiOiIyMDI1LTExLTI3VDA1OjEzOjIxLjg5NloiLCJha1VVSUQiOiI5NTZlOTU2NC0xOWY3LTQ5NjgtYjU2ZC0wNWMyYzU2NzcyNmYifQ=="
},
"node": {
"type": "object",
"properties": {
"akUUID": {
"type": "string",
"format": "uuid",
"example": "956e9564-19f7-4968-b56d-05c2c567726f"
},
"createdAt": {
"type": "string",
"format": "date-time",
"example": "2025-11-27T05:13:21.896Z"
},
"updatedAt": {
"type": "string",
"format": "date-time",
"example": "2025-11-27T05:13:21.896Z"
},
"cost": {
"type": "integer",
"example": 160
},
"uiMetadata": {
"type": "object",
"properties": {
"inputs": {
"type": "array",
"items": {
"type": "object"
}
},
"outputs": {
"type": "array",
"items": {
"type": "object"
}
}
},
"additionalProperties": false
},
"uiMetadataSchemaVersion": {
"type": "string",
"example": "21"
},
"models": {
"type": "array",
"items": {
"type": "string"
}
},
"executability": {
"type": "object",
"properties": {
"isExecutable": {
"type": "boolean",
"example": true
},
"reasons": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": false,
"properties": {
"models": {
"type": "string",
"example": "gemini-2.5-flash-image"
}
}
}
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
},
"totalCount": {
"type": "integer",
"example": 2
},
"pageInfo": {
"type": "object",
"properties": {
"hasNextPage": {
"type": "boolean",
"example": false
},
"hasPreviousPage": {
"type": "boolean",
"example": false
},
"startCursor": {
"type": "string",
"example": "eyJjcmVhdGVkQXQiOiIyMDI1LTExLTI3VDA1OjEzOjIxLjg5NloiLCJha1VVSUQiOiI5NTZlOTU2NC0xOWY3LTQ5NjgtYjU2ZC0wNWMyYzU2NzcyNmYifQ=="
},
"endCursor": {
"type": "string",
"example": "eyJjcmVhdGVkQXQiOiIyMDI1LTExLTI3VDA1OjEzOjIxLjg5NloiLCJha1VVSUQiOiI5NTZlOTU2NC0xOWY3LTQ5NjgtYjU2ZC0wNWMyYzU2NzcyNmYifQ=="
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"NodeInput": {
"type": "object",
"title": "NodeInput",
"description": "A node input object for customizing a Blueprint Execution",
"required": [
"nodeId",
"settingName",
"value"
],
"properties": {
"nodeId": {
"type": "string",
"format": "uuid",
"description": "The ID of the node in the Blueprint",
"example": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
},
"settingName": {
"type": "string",
"enum": [
"text",
"imageUrl",
"textVariables"
],
"description": "The type of setting to replace:\n- `text`: Direct text replacement (value is a string)\n- `imageUrl`: Image URL input (value is a URL string)\n- `textVariables`: Text with placeholder variables (value is an array of TextVariable)",
"example": "text"
},
"value": {
"oneOf": [
{
"type": "string",
"description": "String value. Use for settingName='text' (direct text) or settingName='imageUrl' (image URL)"
},
{
"type": "array",
"items": {
"$ref": "#/components/schemas/TextVariable"
},
"description": "Array of TextVariable objects. Use only for settingName='textVariables' to replace {{placeholders}} in the Blueprint"
}
],
"description": "The replacement value. Type depends on settingName:\n- `text`: string (the full text)\n- `imageUrl`: string (the image URL)\n- `textVariables`: array of TextVariable objects",
"example": "A futuristic cityscape at sunset"
}
}
},
"TextVariable": {
"type": "object",
"title": "TextVariable",
"description": "A text variable for replacing placeholders in Blueprint templates",
"required": [
"name",
"value"
],
"properties": {
"name": {
"type": "string",
"description": "The name of the placeholder variable (without curly braces)",
"example": "characterName"
},
"value": {
"type": "string",
"description": "The value to replace the placeholder with",
"example": "Luna"
}
}
},
"ApiError": {
"type": "object",
"title": "ApiError",
"description": "API error response structure",
"required": [
"message"
],
"properties": {
"message": {
"type": "string",
"description": "Error message"
},
"path": {
"type": "array",
"items": {
"type": "string"
},
"description": "Path to the field that caused the error"
},
"locations": {
"type": "array",
"items": {
"type": "object",
"properties": {
"column": {
"type": "integer"
},
"line": {
"type": "integer"
}
}
},
"description": "Location information for the error"
},
"extensions": {
"type": "object",
"description": "Additional error details and context"
}
}
},
"apiCreditCost": {
"nullable": true,
"title": "Int",
"type": "integer",
"description": "API credits cost, available for Production API users. Note: it will be deprecated. Please use the cost instead.",
"deprecated": true
},
"isVariation": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "If it is a variation image."
},
"isInitImage": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "If it is an init image uploaded by the user. This image is uploaded from endpoint: Upload init image."
},
"imageToVideo": {
"nullable": true,
"title": "Boolean",
"type": "boolean",
"description": "If it is an image to video generation."
},
"sd_versions": {
"type": "string",
"nullable": false,
"title": "sd_versions",
"enum": [
"v1_5",
"v2",
"v3",
"SDXL_0_8",
"SDXL_0_9",
"SDXL_1_0",
"SDXL_LIGHTNING",
"PHOENIX",
"FLUX",
"FLUX_DEV",
"KINO_2_0"
],
"description": "The base version of stable diffusion to use if not using a custom model. v1_5 is 1.5, v2 is 2.1, if not specified it will default to v1_5. Also includes SDXL and SDXL Lightning models"
},
"lora": {
"type": "object",
"properties": {
"akUUID": {
"nullable": true,
"type": "string",
"description": "Unique identifier for the element. Elements can be found from the List Elements endpoint."
},
"creatorName": {
"nullable": true,
"type": "string",
"description": "Name of the creator of the element"
},
"name": {
"nullable": true,
"type": "string",
"description": "Name of the element"
},
"description": {
"nullable": true,
"type": "string",
"description": "Description for the element"
},
"urlImage": {
"nullable": true,
"type": "string",
"description": "URL of the element image"
},
"baseModel": {
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# Full source: https://raw.githubusercontent.com/api-evangelist/leonardo-ai/refs/heads/main/openapi/leonardo-ai-video-generation-openapi.json