Recraft V4 Pro API
Recraftimage$0.314 / runSubmit a Recraft V4 Pro run over HTTP, then poll it or take a webhook. Results are files on media.ezflows.io. Try it in the playground first.
Async: the POST answers at once with a request id. Poll it, or take the webhook.
- 01
Submit
Parameters at the top level of the JSON body. Answers 202 with a request id.
curlPOST /v1/models/recraft-v4-pro curl -X POST https://api.ezflows.io/v1/models/recraft-v4-pro \ -H "Authorization: Bearer $EZFLOWS_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "prompt": "a wide shot of a desert at dusk", "size": "auto" }' # 202 Accepted, at once — it never waits for the model: # {"request_id": "req_8f2a41c9b70e4d15", "status": "queued", # "poll_url": "https://api.ezflows.io/v1/requests/req_8f2a41c9b70e4d15"} - 02
Poll
Same bearer header, every few seconds, until the status is final.
curlGET /v1/requests/:id REQUEST_ID=req_8f2a41c9b70e4d15 # from the POST while :; do BODY=$(curl -s https://api.ezflows.io/v1/requests/$REQUEST_ID \ -H "Authorization: Bearer $EZFLOWS_API_KEY") STATUS=$(echo "$BODY" | jq -r .data.status) case "$STATUS" in succeeded|failed|cancelled) break ;; esac sleep 3 done echo "$BODY" | jq -r '.data.output.artifacts[].url' # media.ezflows.io, kept 90 days - 03
Response
Files are on media.ezflows.io, kept 90 days. A failed run says why and costs nothing.
json200 · succeeded { "data": { "id": "req_8f2a41c9b70e4d15", "model_slug": "recraft-v4-pro", "status": "succeeded", "http_status": 200, "cost": 0.313911, "auth_method": "api_key", "error": null, "submitted_at": "2026-09-12T18:07:21.114Z", "queue_started_at": "2026-09-12T18:07:21.402Z", "execution_started_at": "2026-09-12T18:07:22.010Z", "first_byte_at": "2026-09-12T18:07:52.871Z", "finished_at": "2026-09-12T18:07:55.203Z", "io_deleted_at": null, "canvas_id": null, "canvas_node_id": null, "client_attempt_id": null, "idempotency_key": null, "input": { "prompt": "a wide shot of a desert at dusk", "size": "auto" }, "output": { "artifacts": [ { "index": 0, "kind": "image", "contentType": "image/png", "url": "https://media.ezflows.io/outputs/<account>/req_8f2a41c9b70e4d15/0.png" } ] } } } - 04
Webhook
Skip polling: we POST the result to your endpoint, at least once.
- Register
- Create an endpoint under Webhooks in the dashboard; the signing secret is shown once.
- Events
- request.succeeded · request.failed · request.cancelled
- Headers
- ezflows-event-id (dedupe on it) · ezflows-timestamp (unix seconds) · ezflows-signature t=<ts>,v1=<hex HMAC-SHA256 of "<ts>.<raw body>">
- Verify
- Over the exact bytes received, in constant time; reject anything older than five minutes.
- Respond
- Any 2xx within 10 s. Redirects are not followed.
- Retries
- Five, with backoff: 30 s · 60 s · 2 min · 4 min · 8 min. Disabled after five consecutive dead deliveries.
jsonDelivery body { "id": "82cf46a4-841e-41d6-b3c7-facc937d3252", "type": "request.succeeded", "created_at": "2026-09-12T18:07:55Z", "data": { "id": "req_8f2a41c9b70e4d15", "model_slug": "recraft-v4-pro", "status": "succeeded", "cost": 0.313911, "output": { "artifacts": [ { "url": "https://media.ezflows.io/…/0.png" } ] } } }curlverify.sh # Create the endpoint under Webhooks in the dashboard; the signing secret is shown once. # ezflows-signature: t=<ts>,v1=<hex HMAC-SHA256 of "<ts>.<raw body>"> # body.json = the exact bytes received. Reject anything older than five minutes. EXPECTED=$({ printf '%s.' "$TS"; cat body.json; } \ | openssl dgst -sha256 -hmac "$EZFLOWS_WEBHOOK_SECRET" -r | cut -d' ' -f1) [ "$EXPECTED" = "$V1" ] && echo "valid" || echo "reject"
Parameters 7
| Name | Type | Default | Allowed | Description |
|---|---|---|---|---|
| promptrequired | string | — | — | Text describing the image to generate (up to 10,000 characters). Text you want rendered in the image can be quoted directly. |
| style_reference_urls | string[] | [] | up to 10 image urls | Optional 1-10 images (PNG, JPG or WEBP) whose look the generation should match: rendering technique, colors, texture and composition. A one-off style-creation fee is added when references are attached. |
| size | enum | auto | auto · 2048x2048 · 3072x1536 · 1536x3072 · 2560x1664 · 1664x2560 · 2432x1792 · 1792x2432 · 2304x1792 · 1792x2304 · 1664x2688 · 2560x1792 · 1792x2560 · 2688x1536 · 1536x2688 | Width and height of the generated image in pixels. Auto lets Recraft pick from the prompt. The API also accepts a bare aspect ratio such as 16:9. |
| style_match | enum | flexible | flexible · precise | How closely to follow the style reference images. Only used when style reference images are attached. |
| colors | string[] | [] | — | Up to 10 preferred colors as #RRGGBB hex values, e.g. #1E90FF. |
| background_color | string | — | — | Preferred background color as a #RRGGBB hex value. |
| seed | integer | -1 | -1–2147483647 | Seed for reproducible generation. -1 picks a random seed. |
File inputs (style_reference_urls: up to 10 image urls) take URLs. Upload the raw file to POST /v1/uploads with its own Content-Type and pass the url it returns. Inputs are kept 90 days.