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Documentation Index

Fetch the complete documentation index at: https://docs.runflow.io/llms.txt

Use this file to discover all available pages before exploring further.

Pricing: $0.03/second. Endpoint: POST /v1/models/google/veo3.1/lite/runs.
Veo 3.1 Lite balances practical utility with professional capabilities.

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Overview

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Pricing

  • Base price: $0.03/second
  • Note: 720p without audio (base)

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Veo 3.1 Lite API

Endpoint: POST /v1/models/google/veo3.1/lite/runs

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Run the model

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Python

import requests

response = requests.post(
    "https://api.runflow.io/v1/models/google/veo3.1/lite/runs",
    headers={"Authorization": "Bearer RUNFLOW_API_KEY"},
    json={
        "input": {
            "prompt": "Time-lapse of a single flower blooming in a sunlit garden, macro lens close-up, golden hour light, dewdrops visible on petals, smooth accelerated motion",
            "duration": "6s",
            "resolution": "720p"
        },
        "callback_url": "https://your-server.com/webhook"
    },
)

data = response.json()
print(data)

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Node.js

const response = await fetch(
  "https://api.runflow.io/v1/models/google/veo3.1/lite/runs",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer RUNFLOW_API_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
        "input": {
            "prompt": "Time-lapse of a single flower blooming in a sunlit garden, macro lens close-up, golden hour light, dewdrops visible on petals, smooth accelerated motion",
            "duration": "6s",
            "resolution": "720p"
        },
        "callback_url": "https://your-server.com/webhook"
    }),
  }
);

const data = await response.json();
console.log(data);

​
cURL

curl -X POST https://api.runflow.io/v1/models/google/veo3.1/lite/runs \
  -H "Authorization: Bearer $RUNFLOW_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'JSON'
{
    "input": {
        "prompt": "Time-lapse of a single flower blooming in a sunlit garden, macro lens close-up, golden hour light, dewdrops visible on petals, smooth accelerated motion",
        "duration": "6s",
        "resolution": "720p"
    },
    "callback_url": "https://your-server.com/webhook"
}
JSON

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Request parameters

ParameterTypeRequiredDescription
inputobjectrequiredModel input parameters. See “Input schema” below.
callback_urlstring | nulloptionalWebhook URL - POSTed when the run reaches a terminal state.
metadataobject | nulloptionalArbitrary key-value pairs attached to the run.

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Input schema

FieldTypeRequiredAllowed valuesDescription
promptstringrequiredAny
aspect_ratiostringoptional16:9, 9:16
durationstringoptional4s, 6s, 8s
negative_promptstringoptionalAny
resolutionstringoptional720p, 1080p
generate_audiobooleanoptionalAny
seedintegeroptionalAny
auto_fixbooleanoptionalAny
safety_tolerancestringoptional1, 2, 3, 4, 5, 6

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Output schema

FieldTypeDescription
outputsjsonUnified output array - one entry per generated artifact with url/type/width/height/duration/etc.
nsfw_detectedjsontrue if the provider flagged output as NSFW, false if cleared, null if not checked.
seedjsonDeterministic seed used for generation, or null if the provider doesn’t return one.
timingjsonProvider timing info (inference_ms etc.), or null.

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Callback payload

When you provide a callback_url, Runflow POSTs to it once the run reaches a terminal state.
FieldTypeDescription
eventstringEvent type: “run.completed”, “run.failed”, or “run.cancelled”.
run_idstringThe unique identifier of the run.
statusstringTerminal status: “succeeded”, “failed”, or “cancelled”.
outputobject | nullThe run output. Null if the run failed or was cancelled.
duration_msnumber | nullTotal run duration in milliseconds.
created_atstring | nullISO 8601 timestamp when the run was created.
completed_atstring | nullISO 8601 timestamp when the run reached terminal state.
metadataobject | nullThe metadata object passed at run creation, if any.
  • Retries: 3 attempts with exponential backoff (1s, 2s). Retries on 5xx / network errors only.
  • Headers: Runflow-Request-Id is always sent. Runflow-Signature is sent if a signing secret is configured.

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Additional Resources

Browse all models

Browse the catalog.

Run lifecycle

Callbacks, polling, statuses.

Callbacks

Handle async results.

Pricing

How requests bill out.