Create one narrated still-image MP4 for $0.02 USDC

Create one narrated still-image MP4 for $0.02 USDC: a bounded FLUX Schnell visual, Kokoro voiceover, and first-party composition in one agent-ready result. Call for a short social post, announcement, product card, or explainer—not generative motion, timeline editing, captions, music, or a full video-production suite. Returns durable MP4, image, and WAV URLs with SHA-256, actual provider source, cost, and margin receipt; no buyer API key or subscription.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://api.delx.ai/api/v1/x402/narrated-post

Our checks, last 30 days

We never call tools that send, buy, move money or file anything, not even without paying.

Example input (from the provider)

{
  "body": {
    "aspect_ratio": "1:1",
    "image_prompt": "A clean cobalt product card with a friendly autonomous agent",
    "narration": "Meet the narrated launch asset your agent can buy and receive in one workflow.",
    "quality_profile": "balanced",
    "speed": 1,
    "voice": "af_bella"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "aspect_ratio": {
              "default": "1:1",
              "enum": [
                "1:1",
                "16:9",
                "9:16"
              ],
              "type": "string"
            },
            "image_prompt": {
              "description": "Prompt for the single still image composed into the MP4.",
              "maxLength": 2000,
              "minLength": 1,
              "type": "string"
            },
            "narration": {
              "description": "Voiceover text for the narrated post.",
              "maxLength": 500,
              "minLength": 1,
              "type": "string"
            },
            "quality_profile": {
              "default": "balanced",
              "enum": [
                "balanced",
                "raw"
              ],
              "type": "string"
            },
            "speed": {
              "default": 1,
              "maximum": 2,
              "minimum": 0.5,
              "type": "number"
            },
            "voice": {
              "default": "af_bella",
              "enum": [
                "af_bella",
                "af_nicole",
                "af_sarah",
                "am_fenrir",
                "am_michael",
                "bf_emma",
                "bm_george",
                "ff_siwis",
                "hf_alpha",
                "hm_omega",
                "alloy",
                "echo",
                "fable",
                "onyx",
                "nova",
                "shimmer"
              ],
              "type": "string"
            }
          },
          "required": [
            "image_prompt",
            "narration"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "aspect_ratio": "1:1",
          "audio_url": "https://api.delx.ai/api/v1/generated-audio/a86320bd2ff843c38dad34a3ac068856.wav",
          "bytes": 288144,
          "composition_receipt": {
            "composition_id": "ec591bb801bd4a6bb020229d7dd63f35",
            "degraded_fields": [],
            "facilitator": "payai",
            "format": "delx/composition-receipt/v1",
            "legs": [
              {
                "generation_id": "340337d68b9b40ac9835b94486b10d45",
                "provider_source": "commercial_api",
                "sha256": "04f03dc8eb735baa9a953f5e69ef83855104f892765c63e81b4a93d55465a31a",
                "status": "succeeded",
                "tool_name": "generate_image_budget",
                "upstream_cost_usd": 0.003
              },
              {
                "generation_id": "a86320bd2ff843c38dad34a3ac068856",
                "provider_source": "commercial_api",
                "sha256": "05db65e105be46a4ff8033f405fb108e9138d634c8cd3685cb97b74784eeb809",
                "status": "succeeded",
                "tool_name": "generate_speech",
                "upstream_cost_usd": 0.001
              }
            ],
            "payment_protocol": "x402",
            "price_usdc": 0.02,
            "refund_decision": "not_required",
            "settlement_tx": "0x2a7f5e72",
            "tool_name": "narrated_post"
          },
          "duration_ms": 4200,
          "format": "delx/narrated-post/v1",
          "generation_id": "ec591bb801bd4a6bb020229d7dd63f35",
          "gross_margin_pct": 80,
          "gross_margin_usd": 0.016,
          "height": 1024,
          "image_url": "https://api.delx.ai/api/v1/generated-images/340337d68b9b40ac9835b94486b10d45.webp",
          "media_type": "video/mp4",
          "provider_source": "commercial_api",
          "sale_price_usdc": 0.02,
          "sha256": "86a6255fc67284d1c82ed96d89a4a31065edb34a96f46847531fd782537f390f",
          "speed": 1,
          "upstream_cost_usd": 0.004,
          "video_url": "https://api.delx.ai/api/v1/generated-narrated-posts/ec591bb801bd4a6bb020229d7dd63f35.mp4",
          "voice": "af_bella",
          "width": 1024
        },
        "type": {
          "const": "json",
          "type": "string"
        }
      },
      "required": [
        "type",
        "example"
      ],
      "type": "object"
    }
  },
  "required": [
    "input",
    "output"
  ],
  "type": "object"
}

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