Delx Commerce — Narrated Post Generator

x402

Delx Commerce — Narrated Post Generator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Generates a narrated MP4 video by composing an AI-generated still image with AI voiceover speech from a text prompt and narration script

Price / call$0.02

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

Output

Returns a JSON object containing a publicly accessible MP4 video URL (composed still image + speech audio), a WAV audio URL, a WebP image URL, generation ID, SHA256 hash for verification, video dimensions, duration in milliseconds, aspect ratio, speed, voice used, byte size, and a full composition receipt detailing upstream cost legs, settlement transaction, payment protocol, and refund decision.

Example use cases

Social media product teaser

“Make a 9:16 vertical narrated video where the image shows 'a sleek black coffee mug on a marble countertop, steam rising, morning light' and the voiceover using the 'am_michael' voice says 'Start every morning with something extraordinary. Introducing the Ember Mug.' — normal speed, balanced quality.”

AI travel destination reel

“Create a narrated post in 16:9 landscape with the 'af_sarah' voice — image prompt is 'aerial view of Santorini white buildings and blue domes at golden hour', narration is 'Greece is calling. Your dream vacation is just one flight away.' Use default speed and balanced quality.”

Motivational daily content

“Generate a square narrated video clip — image should be 'a lone runner on a misty forest trail at dawn' and the narration using 'bf_emma' voice at 1.25x speed should say 'Every great journey begins with a single step. Lace up and go.'”

Technical details

Endpoint

POSThttps://commerce.delx.ai/api/v1/x402/narrated-post?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fully composed narrated video (still image + voiceover audio → MP4) in a single pay-per-result call with no signup, verifiable delivery via SHA256, and crypto micropayment via x402/USDC. Prefer it over separate image+TTS APIs when you want atomic composition with a transparent cost receipt. Ideal for agent workflows generating social media content at $0.02 per video with multiple voice and aspect ratio options.

Side effects

Image prompt or narration text missing or empty — validation error
Narration text exceeds 500 characters — rejected
Image prompt exceeds 2000 characters — rejected
Invalid voice enum value — rejected
Speed outside 0.5–2.0 range — rejected
Upstream image or TTS generation fails — composition receipt will show failed leg status
Payment not settled via x402 — 402 response blocking content delivery
Network timeout during MP4 composition — may return partial or error state

Input

Schema · Request body

Field	Type	Description
speed	number
voice	string
narration	string	Voiceover text for the narrated post.
aspect_ratio	string
image_prompt	string	Prompt for the single still image composed into the MP4.
quality_profile	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "bytes": 288144,
    "speed": 1,
    "voice": "af_bella",
    "width": 1024,
    "format": "delx/narrated-post/v1",
    "height": 1024,
    "sha256": "86a6255fc67284d1c82ed96d89a4a31065edb34a96f46847531fd782537f390f",
    "audio_url": "https://api.delx.ai/api/v1/generated-audio/a86320bd2ff843c38dad34a3ac068856.wav",
    "image_url": "https://api.delx.ai/api/v1/generated-images/340337d68b9b40ac9835b94486b10d45.webp",
    "video_url": "https://api.delx.ai/api/v1/generated-narrated-posts/ec591bb801bd4a6bb020229d7dd63f35.mp4",
    "media_type": "video/mp4",
    "duration_ms": 4200,
    "aspect_ratio": "1:1",
    "generation_id": "ec591bb801bd4a6bb020229d7dd63f35",
    "provider_source": "commercial_api",
    "sale_price_usdc": 0.02,
    "gross_margin_pct": 80,
    "gross_margin_usd": 0.016,
    "upstream_cost_usd": 0.004,
    "composition_receipt": {
      "legs": [
        {
          "sha256": "04f03dc8eb735baa9a953f5e69ef83855104f892765c63e81b4a93d55465a31a",
          "status": "succeeded",
          "tool_name": "generate_image_budget",
          "generation_id": "340337d68b9b40ac9835b94486b10d45",
          "provider_source": "commercial_api",
          "upstream_cost_usd": 0.003
        },
        {
          "sha256": "05db65e105be46a4ff8033f405fb108e9138d634c8cd3685cb97b74784eeb809",
          "status": "succeeded",
          "tool_name": "generate_speech",
          "generation_id": "a86320bd2ff843c38dad34a3ac068856",
          "provider_source": "commercial_api",
          "upstream_cost_usd": 0.001
        }
      ],
      "format": "delx/composition-receipt/v1",
      "tool_name": "narrated_post",
      "price_usdc": 0.02,
      "facilitator": "payai",
      "settlement_tx": "0x2a7f5e72",
      "composition_id": "ec591bb801bd4a6bb020229d7dd63f35",
      "degraded_fields": [],
      "refund_decision": "not_required",
      "payment_protocol": "x402"
    }
  }
}

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