# Friday Seller Tools – Marketplace Listing Build

> Friday Seller Tools – Marketplace Listing Build is a paid API for AI agents from friday-seller-tools-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-13).

Generates Amazon, Walmart, Shopify, and eBay listing content, upload-preparation files, advertising copy, and image briefs for a product in one call.

## Facts

- Endpoint: POST https://friday-seller-tools-production.up.railway.app/v1/listing/build
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/friday-seller-tools-marketplace-listing-build-9456be23
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zvird8k8IH0GD2t6196Nd

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability friday-seller-tools-marketplace-listing-build-9456be23 -d '<json body>'
```

Example prompt: Build me a complete Amazon listing for my stainless steel insulated water bottle — include an optimized title, five bullet points, product description, advertising headline, and an image brief, all ready to upload.

## When to prefer this

Choose this endpoint when you need instant, low-cost ($0.25 per call) marketplace listing content across Amazon, Walmart, Shopify, or eBay — especially when you want upload-ready files, advertising copy, and image briefs generated together in a single automated step rather than assembling them from separate tools or manual copywriters.

## Known failure modes

- Missing required product information results in a validation error
- Unsupported marketplace name causes a bad request error
- Payment failure via x402 protocol blocks job creation
- Job queued but times out before completion
- Generated content may not fully comply with latest marketplace policy changes

## How this service works

Instant, low-cost Amazon, Walmart, Shopify, and eBay listing, upload-preparation, advertising, and image-brief deliverables.

## Output

Returns a job_id and status ('queued'), indicating the listing build job has been accepted. The full deliverable — including marketplace-optimized title, bullet points, description, advertising copy, and image brief — is retrieved once the job completes, formatted and ready for direct upload to the chosen marketplace.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tone": {
   "type": "string",
   "title": "Tone",
   "default": "clear, factual, benefit-led",
   "maxLength": 200
  },
  "product": {
   "type": "object",
   "title": "ProductFacts",
   "required": [
    "brand",
    "product_name",
    "category",
    "features"
   ],
   "properties": {
    "brand": {
     "type": "string",
     "title": "Brand",
     "maxLength": 100,
     "minLength": 1
    },
    "benefits": {
     "type": "array",
     "items": {
      "type": "string",
      "maxLength": 500,
      "minLength": 1
     },
     "title": "Benefits",
     "maxItems": 20
    },
    "category": {
     "type": "string",
     "title": "Category",
     "maxLength": 150,
     "minLength": 2
    },
    "features": {
     "type": "array",
     "items": {
      "type": "string",
      "maxLength": 500,
      "minLength": 1
     },
     "title": "Features",
     "maxItems": 20,
     "minItems": 1
    },
    "keywords": {
     "type": "array",
     "items": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1
     },
     "title": "Keywords",
     "maxItems": 50
    },
    "materials": {
     "type": "array",
     "items": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1
     },
     "title": "Materials",
     "maxItems": 20
    },
    "price_usd": {
     "anyOf": [
      {
       "type": "number",
       "maximum": 1000000,
       "exclusiveMinimum": 0
      },
      {
       "type": "null"
      }
     ],
     "title": "Price Usd",
     "default": null
    },
    "dimensions": {
     "anyOf": [
      {
       "type": "string",
       "maxLength": 200
      },
      {
       "type": "null"
      }
     ],
     "title": "Dimensions",
     "default": null
    },
    "marketplace": {
     "enum": [
      "amazon_us",
      "walmart_us",
      "shopify",
      "ebay_us"
     ],
     "type": "string",
     "title": "Marketplace",
     "default": "amazon_us"
    },
    "product_url": {
     "anyOf": [
      {
       "type": "string",
       "format": "uri",
       "maxLength": 2083,
       "minLength": 1
      },
      {
       "type": "null"
      }
     ],
     "title": "Product Url",
     "default": null
    },
    "product_name": {
     "type": "string",
     "title": "Product Name",
     "maxLength": 200,
     "minLength": 2
    },
    "target_audience": {
     "type": "string",
     "title": "Target Audience",
     "default": "general shoppers",
     "maxLength": 500
    },
    "veri
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "job_id": "example",
  "status": "queued"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/friday-seller-tools-marketplace-listing-build-9456be23/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from friday-seller-tools-production.up.railway.app](https://www.zero.xyz/host/friday-seller-tools-production.up.railway.app/llms.txt)