API reference / Assets

Create an upload URL

POST/api/v1/assets/upload/signed-url

Authorization

Send your API key or MCP OAuth token in the Authorization: Bearer header. Active or trialing Unlimited is required.

Required permission assets:write

Every mutation requires JSON and an Idempotency-Key. Reuse the same key and exact input when retrying.

Parameters

Idempotency-Keyheaderrequired

string

Persist this key for retries. Reusing it with changed input returns 409. Receipts are retained for at least 24 hours.

min length: 8 · max length: 128

Request body

application/json

projectIdbodyrequired

string · uuid

filenamebodyrequired

string

min length: 1 · max length: 512

contentTypebodyrequired

string

min length: 1 · max length: 128

deviceTypebodyoptional

"mobile" | "tablet" | "desktop" | "watch"

platformbodyoptional

"ios" | "android"

fileTypebodyoptional

View complete request schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "projectId": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "filename": {
      "type": "string",
      "minLength": 1,
      "maxLength": 512
    },
    "contentType": {
      "type": "string",
      "minLength": 1,
      "maxLength": 128
    },
    "deviceType": {
      "type": "string",
      "enum": [
        "mobile",
        "tablet",
        "desktop",
        "watch"
      ]
    },
    "platform": {
      "type": "string",
      "enum": [
        "ios",
        "android"
      ]
    },
    "fileType": {
      "type": "string",
      "enum": [
        "screenshot-overwrite-stage",
        "illustration",
        "logo",
        "panorama",
        "background",
        "mockup-media",
        "promo-media",
        "video-frame",
        "website-render",
        "font"
      ]
    }
  },
  "required": [
    "projectId",
    "filename",
    "contentType"
  ],
  "additionalProperties": false
}

Request example

Set ALF_API_URL to https://dashboard.applaunchflow.com/api/v1 and ALF_API_KEY to your key. Replace sample IDs with your project’s values. Use a new ALF_REQUEST_ID for each new operation.

cURL

curl --request POST \
  --url "$ALF_API_URL/assets/upload/signed-url" \
  --header "Authorization: Bearer $ALF_API_KEY" \
  --header "Content-Type: application/json" \
  --header "Idempotency-Key: $ALF_REQUEST_ID" \
  --data '{
  "projectId": "11111111-1111-4111-8111-111111111111",
  "filename": "string",
  "contentType": "string"
}'

This example shows the request structure. Some editor operations require additional query parameters that are not yet described in OpenAPI.

Response

Successful JSON responses wrap the result in data, with a request ID in meta.requestId.

uploadUrldatarequired

string

pathdatarequired

string

View response schema

{
  "type": "object",
  "required": [
    "data",
    "meta"
  ],
  "properties": {
    "data": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "type": "object",
      "properties": {
        "uploadUrl": {
          "type": "string"
        },
        "path": {
          "type": "string"
        }
      },
      "required": [
        "uploadUrl",
        "path"
      ],
      "additionalProperties": {}
    },
    "meta": {
      "type": "object",
      "required": [
        "requestId"
      ],
      "properties": {
        "requestId": {
          "type": "string",
          "format": "uuid"
        }
      }
    }
  }
}

Errors & retries

Errors use application/problem+json. Check the stable code and keep requestId when contacting support. Respect Retry-After on 429 responses.

See error handling and idempotency →