Leap API
Kling 3.0 Motion Control APIKuaishou's model, through Leap
Moves the character in your image the way the person in a reference video moves, and keeps the face through turns, hands and hats. Billed by the length of the reference video. One Leap key and one balance run it and every other model, priced per call in dollars.
First $5 top-up, no card fee.
- One key for every model
- Every call quoted first
- A failed call costs nothing
# Videos and sounds go up in three steps: start an upload of the file's# exact size, PUT the file where the answer says, then complete it.upload() { UPLOAD=$(jq -n --arg type "$2" --arg name "$1" --argjson bytes "$(wc -c < "$1")" \ '{content_type: $type, bytes: $bytes, filename: $name}' \ | curl -s https://api.tryleap.ai/v1/uploads -H "x-api-key: $LEAP_API_KEY" \ -H "content-type: application/json" -d @-) echo "$UPLOAD" | jq -r '"url = \"\(.upload_url)\"", "request = \"\(.upload_method)\"", (.upload_headers | to_entries[] | "header = \"\(.key): \(.value)\"")' \ | curl -sf -K - -T "$1" > /dev/null curl -s -X POST "https://api.tryleap.ai/v1/uploads/$(echo "$UPLOAD" | jq -r .id)/complete" \ -H "x-api-key: $LEAP_API_KEY" -H "content-type: application/json" -d '{}' | jq -r .id} REFERENCE_VIDEO_ID=$(upload clip.mp4 video/mp4) # Upload the image (PNG, JPEG or WebP, up to 4 MB) and keep its ID.CHARACTER_IMAGE_ID=$(curl -s "https://api.tryleap.ai/v1/files?filename=photo.jpg" \ -H "x-api-key: $LEAP_API_KEY" \ -H "content-type: image/jpeg" \ --data-binary @photo.jpg | jq -r .id) # Then run the model with them.jq -n --arg reference_video "$REFERENCE_VIDEO_ID" --arg character_image "$CHARACTER_IMAGE_ID" '{ "model": "kling/kling-3.0-motion-control", "input": { "prompt": "A heron lands on a still lake at dawn", "resolution": "720p", "reference_video": $reference_video, "character_image": $character_image }}' \ | curl https://api.tryleap.ai/v1/generations \ -H "x-api-key: $LEAP_API_KEY" \ -H "content-type: application/json" \ -H "prefer: wait=60" \ -d @- # Video often outlasts the wait and answers "queued" or "running".# Put its "id" in GENERATION_ID and read it again until it is done:# curl https://api.tryleap.ai/v1/generations/$GENERATION_ID -H "x-api-key: $LEAP_API_KEY"Set LEAP_API_KEY and send it. It uploads your video and image first, since inputs take file IDs, not URLs. With prefer: wait=60 the answer holds the result when the call finishes within a minute; a longer one is read again by its ID.
- Model ID
- kling/kling-3.0-motion-control
- Price per call
- $0.17 a second of your video
- This call
- It costs $0.17 a second of your video.
- First top-up
- A first top-up of $5, with no fee, pays for your first calls.
What it makes
Made with Kling 3.0 Motion Control
Real Kling 3.0 Motion Control runs on Leap. Each one passed Leap's media quality check before it was shown.
A grey-bearded man in wraparound shades owns the red stage
Pink hijab, striped tee, every arm wave on the beat
Mirror-selfie guy, own hoodie, full routine
Gym-mirror selfie in, own top and locs on the red stage
Copper curls and wraparound shades, mid-routine
A white-bobbed grandmother in shades does the whole routine
Inputs
What Kling 3.0 Motion Control takes
Only character_image and reference_video are needed; everything else has a default. The same schema is public, with no key, at api.tryleap.ai/v1/public/models/kling/kling-3.0-motion-control.
MCP
Or let your agent call it.
Leap's MCP server lets Claude Code, Claude, VS Code and other MCP clients run Kling 3.0 Motion Control, read its inputs and fetch the result, on your balance. Signing in happens in the browser, so there is no key to paste.
claude mcp add --transport http leap https://app.tryleap.ai/api/mcpClaude Code signs you in through the browser the first time it calls Leap.
curl -fsSL https://www.tryleap.ai/install.sh | shInstalls the Leap skill for every coding agent it finds: which endpoint to call, how to read a model's inputs, when to wait and when to poll.
Questions
Kling 3.0 Motion Control API questions
- How much does the Kling 3.0 Motion Control API cost?
- It costs $0.17 a second of your video. That is the provider's list price plus our margin, the same as in the studio. POST /v1/quotes prices any input for free before you run it.
- Can I try the Kling 3.0 Motion Control API for free?
- No. API keys run on paid credit, so a key's first call needs a top-up, and quotes are free. A first top-up of $5, with no fee, pays for your first calls.
- Do I pay for calls that fail?
- No. The price is held when a call starts and charged only if it succeeds. A call that fails, or that the model's safety filter refuses, comes back with status "failed" and a failure_cause, and the hold is released.
- Is this Kuaishou's own API?
- No. Leap is a separate service: it sends your call to Kuaishou's model and gives you what it makes, so you need no Kuaishou account. One Leap key runs Kling 3.0 Motion Control and every other model in the catalog, from one balance.
- What are the rate limits?
- 600 requests a minute per API key and 300 a minute per IP address. A batch starts up to 50 calls in one request. A 429 says how long to wait in its Retry-After header.
- Can an AI agent call it?
- Yes. Leap's MCP server lets Claude Code, Claude, VS Code and other MCP clients find Kling 3.0 Motion Control, read its inputs, run it and fetch the result on your balance. The client signs you in through the browser, so there is no key to paste.
Build with Kling 3.0 Motion Control.
Keys run on paid credit, and the first top-up has no fee. The same key runs every model on Leap.
Get an API key