# StableUpload Site Upload Slot Purchase

> StableUpload Site Upload Slot Purchase is a paid API for AI agents from stableupload.dev, paid per call via x402, $2/call, status unknown (last checked 2026-10-12).

Purchases a site upload slot, returning a URL to upload a zip file that can then be activated as a static site.

## Facts

- Endpoint: POST https://stableupload.dev/api/site?utm_source=zero.xyz
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Success rate: 68% of calls made through Zero
- Rating: 5.0 / 5 from 2 reviews
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stableupload-ee499b31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vtV0qBddkuJXz0NmdQRe3

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 stableupload-ee499b31 -d '<json body>'
```

Example prompt: Buy me a StableUpload site slot so I can publish my static site — I have a zip file of my HTML/CSS/JS build ready to upload and then activate.

## When to prefer this

Use this endpoint when you need to deploy a static website from a zip archive via a pay-per-use micropayment model (x402/USDC). Prefer this over traditional hosting APIs when operating as an autonomous agent needing programmatic, wallet-authenticated site deployment without a subscription or account setup. This is the first step in a two-step flow: buy slot here, then upload the zip, then call the Activate endpoint.

## Known failure modes

- Insufficient USDC balance or payment failure — payment rejected, slot not created
- Invalid or missing wallet authentication — 401 unauthorized
- Payment protocol (x402) not supported by client — request fails before slot creation
- Rate limiting or quota exceeded — 429 too many requests
- Server error during slot creation — 500 internal server error

## How this service works

Buy a site upload slot. Upload a zip file, then activate to extract and serve as a static site.

## Output

Returns an upload slot with a pre-signed upload URL for posting the zip file, along with an upload ID and site ID needed to subsequently activate the site and make it live.

## Example request

```json
{
 "tier": "short-10mb",
 "filename": "mysite.zip",
 "policyTtlSeconds": 3600
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tier": {
   "enum": [
    "10mb",
    "100mb",
    "1gb",
    "short-10mb",
    "short-100mb",
    "short-1gb"
   ],
   "type": "string",
   "description": "Site tier. Default 6-month tiers: 10mb ($0.02), 100mb ($0.20), 1gb ($2.00). Short-term 7-day workflow site tiers: short-10mb ($0.005), short-100mb ($0.02), short-1gb ($0.10). short-5gb is not supported for sites."
  },
  "filename": {
   "type": "string",
   "maxLength": 512,
   "minLength": 1,
   "description": "Name of the zip file to upload"
  },
  "policyTtlSeconds": {
   "type": "integer",
   "maximum": 86400,
   "minimum": 60,
   "description": "Optional upload URL/form expiration in seconds, 60-86400. Use longer TTLs only when reserving an output slot for a downstream service."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "maxSize": 10485760,
  "postUrl": "https://stableupload-prod.s3.us-east-1.amazonaws.com/",
  "uploadId": "bs94s5b4ca",
  "expiresAt": "2026-05-02T16:00:00.000Z",
  "uploadUrl": "https://stableupload-prod.s3.us-east-1.amazonaws.com/",
  "postFields": {
   "key": "uploads/bs94s5b4ca/site.zip",
   "policy": "base64-policy",
   "x-amz-date": "20260425T160000Z",
   "Content-Type": "application/zip",
   "x-amz-algorithm": "AWS4-HMAC-SHA256",
   "x-amz-signature": "hex-signature",
   "x-amz-credential": "AKIAEXAMPLE/20260425/us-east-1/s3/aws4_request"
  },
  "curlExample": "curl -X POST \"https://stableupload-prod.s3.us-east-1.amazonaws.com/\" -F \"key=uploads/bs94s5b4ca/site.zip\" -F \"Content-Type=application/zip\" -F \"x-amz-algorithm=AWS4-HMAC-SHA256\" -F \"x-amz-credential=AKIAEXAMPLE/20260425/us-east-1/s3/aws4_request\" -F \"x-amz-date=20260425T160000Z\" -F \"policy=base64-policy\" -F \"x-amz-signature=hex-signature\" -F \"file=@site.zip;type=application/zip\"",
  "uploadMethod": "post",
  "uploadUrlExpiresAt": "2026-04-25T16:15:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stableupload-ee499b31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stableupload.dev](https://www.zero.xyz/host/stableupload.dev/llms.txt)