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Leap API

Seedream APIByteDance's model, through Leap

ByteDance's newest: detailed 2K images and edits of up to 4 reference images. One Leap key and one balance run it and every other model, priced per call in dollars.

  • One key for every model
  • Every call quoted first
  • A failed call costs nothing
curl https://api.tryleap.ai/v1/generations \  -H "x-api-key: $LEAP_API_KEY" \  -H "content-type: application/json" \  -H "prefer: wait=60" \  -d '{    "model": "bytedance/seedream-5.0-pro",    "input": {      "prompt": "A silk scarf in the wind on a ferry deck",      "aspect_ratio": "1:1"    }  }' # Video often outlasts the wait and answers "queued" or "running".# Put its "id" in GENERATION_ID and read it again until it is done:# curl https://api.tryleap.ai/v1/generations/$GENERATION_ID -H "x-api-key: $LEAP_API_KEY"

Set LEAP_API_KEY and send it. 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
bytedance/seedream-5.0-pro
Price per call
$0.0385
This call
An image costs $0.0385.
Free to start
The $2 welcome credit covers 51 calls like it.

What it makes

Made with Seedream 5.0 Pro

Real Seedream 5.0 Pro runs on Leap. Each one passed Leap's media quality check before it was shown.

  • Soba under the tracks, the generated first frame

    “Candid 35mm film still, Kodak Vision3 500T pushed one stop, visible grain and soft halation. 1:40 a.m. in a tiny standing soba shop built into the brick arches under the elevated train tracks in Yurakucho, Tokyo. A 58-year-old Japanese salaryman, stocky with a round face, grey stubble, thinning grey hair combed back and damp from rain, loosened dark-green tie, rumpled beige raincoat, reading glasses pushed up on his forehead, leans over a narrow steel counter holding a steaming bowl of soba close to his mouth with chopsticks, eyes half closed with exhaustion and relief. Behind the counter a young cook in a white cotton headband and indigo apron ladles broth, out of focus. Light: one bare tungsten bulb over the counter and cold fluorescent spill from the street, steam glowing in the bulb light, wet brick, a fogged glass door. Eye level from just across the counter, 40mm lens at f/2, focus on his face, background soft. Palette: tungsten amber, wet brick red, fluorescent cyan. Real skin with pores, oily shine and tired eye bags, no retouching. No readable signs or text.”

  • Basement show, the generated first frame

    “Live concert photograph, 16mm wide lens, handheld from inside the crowd, 1/30 s with motion blur and red flare. A packed, sweaty basement punk show in Colonia Doctores, Mexico City: low concrete ceiling dripping with condensation, a single red gel light and one harsh white strobe. The singer, a stocky Mexican woman in her early thirties, bleached buzz cut with dark roots, septum ring, sleeveless black T-shirt soaked with sweat, a marigold tattoo on her forearm, screams into a microphone held in both hands, eyes squeezed shut, veins standing out on her neck. Behind her a guitarist in his fifties with a long grey ponytail and round glasses hammers a battered white guitar. Raised hands in the foreground out of focus, a crowd-surfer's sneaker at the top of the frame. Palette: blood red, black, strobe white, a single marigold orange. Heavy grain, haze, lens flare. No readable text or logos.”

  • The first frame of Away to me

    “Documentary photograph, 85mm lens, from just behind a farmer's shoulder, sideways rain. A steep hillside in Snowdonia, Wales: wet rust-coloured bracken, dry-stone walls, low cloud rolling over slate ridges. A Welsh hill farmer, 68, ruddy weathered face, white stubble, rain dripping from his tweed flat cap, a torn waxed jacket, a hazel crook, whistles with two fingers in his mouth. Ahead in the grass a black-and-white border collie crouches low, eyes locked on a tight bunch of twenty wet Welsh Mountain sheep further up the slope. Palette: bracken rust, slate grey, wet green, off-white fleece. Real rain streaks, mud, wet fur. No readable text, no logos.”

  • The first frame of Riad

    “Architectural interior photograph, 24mm lens at chest height, late morning. A restored riad in the Marrakech medina seen through a tall carved cedar doorway: an open courtyard with green-and-white zellige tiles, a tiled fountain in the centre, a small orange tree with fruit, carved stucco arches, terracotta pots, a sharp shaft of sunlight falling from the open roof onto the water. Beside the fountain a housekeeper, 55, Amazigh, in an indigo kaftan and headscarf, henna on her hands, scatters pink rose petals onto the water. Palette: zellige green and white, terracotta, orange-tree green, rose pink. Dust in the light shaft, worn tiles, ripples. No readable text, no logos.”

  • The first frame of Margherita

    “Food documentary photograph, 35mm lens from the counter side. The wood-fired dome oven of a century-old pizzeria in the Quartieri Spagnoli, Naples, its mouth glowing with fire, blue-and-yellow majolica tiles around it, flour hanging in the air. A Neapolitan pizzaiolo, 70, broad and heavy with huge hairy forearms, a white cotton cap and T-shirt dusted with flour, a small gold horn charm on a chain, slides a long wooden peel with a fresh margherita toward the flames, his face lit orange, squinting at the heat. Palette: fire orange, flour white, tomato red, majolica blue. Sweat, flour on skin, a charred peel. No readable text, no logos.”

  • The first frame of The tailor

    “A frame from a handmade stop-motion animated film: felt, wood and wire puppets on a miniature set, visible fingerprints in the felt, tiny imperfect stitching, the shallow depth of field of a macro lens. A cramped tailor's shop in Old Havana built in miniature: faded teal walls, bolts of fabric on shelves, an old black sewing machine, a ceiling fan, warm light from a tiny lamp, a window with a blurred vintage car outside. An old Cuban tailor puppet with a felt face, a white wire-wool moustache, half-moon glasses on a chain, rolled shirt sleeves and a yellow tape measure around his neck holds up a red jacket and inspects a seam. Palette: teal, ochre felt, fabric red, warm lamp light. No readable text, no logos.”

The answer

What comes back

A generation. Check status first: succeeded has the file in output, a signed link that works for 24 hours, so download what you keep. failed has error and failure_cause, and costs nothing. usage.cost_usd is what the call was charged.

200 OK, trimmed
{  "id": "gen_...",  "object": "generation",  "model": "bytedance/seedream-5.0-pro",  "status": "succeeded",  "output": [    {      "type": "image",      "url": "https://api.tryleap.ai/files/..."    }  ],  "error": null,  "usage": {    "cost_usd": "0.0385"  }}

Your own photo

Start from an image

Upload the image to POST /v1/files and pass the ID it returns in images. Inputs take file IDs, not URLs. Files and uploads covers video and sound.

curl, with jq
# Upload the photo (PNG, JPEG or WebP, up to 4 MB) and keep its ID.FILE_ID=$(curl -s "https://api.tryleap.ai/v1/files?filename=photo.jpg" \  -H "x-api-key: $LEAP_API_KEY" \  -H "content-type: image/jpeg" \  --data-binary @photo.jpg | jq -r .id) # Then run the model with it.jq -n --arg file "$FILE_ID" '{  "model": "bytedance/seedream-5.0-pro",  "input": {    "prompt": "A silk scarf in the wind on a ferry deck",    "aspect_ratio": "1:1",    "images": [      $file    ]  }}' \  | curl https://api.tryleap.ai/v1/generations \    -H "x-api-key: $LEAP_API_KEY" \    -H "content-type: application/json" \    -H "prefer: wait=60" \    -d @- # Still "queued" or "running" after the wait? Read it again by its "id".

Inputs

What Seedream 5.0 Pro takes

Only prompt is needed; everything else has a default. The same schema is public, with no key, at api.tryleap.ai/v1/public/models/bytedance/seedream-5.0-pro.

Promptprompt
Text, up to 4,000 characters, required
Reference imagesimages
Up to 4 imagesUploaded files to edit or combine, by ID.
Aspect ratioaspect_ratio
1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9, 4:5. Default: 1:1
Imagesn
1 to 4. Default: 1

Pricing

Price per call

An image costs $0.0385. The $2 welcome credit covers 51 default calls. Prices are the provider's list price plus 10%, read from the catalog, and a quote gives the exact price of any input for free.

Seedream 5.0 Pro and its family

A free quote
curl https://api.tryleap.ai/v1/quotes \  -H "x-api-key: $LEAP_API_KEY" \  -H "content-type: application/json" \  -d '{    "model": "bytedance/seedream-5.0-pro",    "input": {      "prompt": "A silk scarf in the wind on a ferry deck",      "aspect_ratio": "1:1"    }  }'

How it works

How the Seedream API works

Every model takes the same request, a model ID and its input, and results, prices, failures and limits work the same way for all of them.

  • Wait for it, or hear when it ends

    prefer: wait=60 holds the request until the result is ready, for up to a minute. A longer run is read again by its ID, or a signed webhook tells your server when it ends.

    prefer: wait=60 / "webhook": "https://..."

    In the docs
  • Failed calls cost nothing

    The price is held when a call starts and charged only if it succeeds. A failed or refused call comes back with its failure_cause, and the hold is released.

    "status": "failed" / "failure_cause": "provider_refused"

    In the docs
  • The price before the call

    POST /v1/quotes takes the same body as a generation and returns its exact price, with the input checked, for free. Every result carries what it was charged.

    POST https://api.tryleap.ai/v1/quotes / "cost_usd"

    In the docs
  • Rate limits

    600 requests a minute per API key and 300 per IP address. A 429 carries Retry-After with the seconds to wait.

    RateLimit-Remaining / Retry-After

    In the docs
  • Safe retries

    Send an idempotency key and a retry after a dropped connection returns the same generation instead of starting a second one.

    idempotency-key: <uuid>

    In the docs
  • Batches

    POST /v1/batches starts up to 50 calls in one request, priced and held together, so either all start or none do.

    POST https://api.tryleap.ai/v1/batches

    In the docs

MCP

Or let your agent call it.

Leap's MCP server lets Claude Code, Claude, VS Code and other MCP clients run Seedream 5.0 Pro, read its inputs and fetch the result, on your balance. Signing in happens in the browser, so there is no key to paste.

Add Leap to Claude Code
claude mcp add --transport http leap https://app.tryleap.ai/api/mcp

Claude Code signs you in through the browser the first time it calls Leap.

Teach your coding agent the Leap API
curl -fsSL https://www.tryleap.ai/install.sh | sh

Installs 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

Seedream API questions

How much does the Seedream API cost?
An image costs $0.0385. That is the provider's list price plus 10%, the same as in the studio. POST /v1/quotes prices any input for free before you run it.
Can I try the Seedream API for free?
Yes. Sign up with a Gmail, Outlook or work address and your workspace starts with $2 of credit, no card needed. An image costs $0.0385. The $2 welcome credit covers 51 default 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 ByteDance's own API?
No. Leap is a separate service: it sends your call to ByteDance's model and gives you what it makes, so you need no ByteDance account. One Leap key runs Seedream 5.0 Pro 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 Seedream 5.0 Pro, 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 Seedream 5.0 Pro.

Start with $2 of credit, no card. The same key runs every model on Leap.

Get an API key