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Stable Upload File Storage API
x402
Stable Upload File Storage API is a paid API for AI agents from stable-upload-git-mason-1140-merit-systems.vercel.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Purchases an upload slot and returns a pre-signed URL for uploading files to cloud storage with configurable size tiers and retention periods.
Price / call$0.005
Success—
StatusUnknown
How this service works
Buy an upload slot. Agent uploads file via returned URL.
Output
Returns an upload ID, a pre-signed upload URL (with method and expiration time), a public URL where the file will be accessible after upload, the maximum allowed file size in bytes, and a ready-to-use curl example for performing the upload.
Example use cases
AI pipeline output archiving
“I need to store the generated image from my pipeline — it's called output-render.png, image/png format — use the short-term 10mb tier since I only need it for 7 days, then give me the public URL.”
Large video file hosting
“Reserve a 1gb upload slot for a video file called final-cut.mp4 with content type video/mp4 using the standard 6-month 1gb tier, and give me the URL to upload it to.”
Temporary document sharing
“I want to upload a document called contract-draft.pdf (application/pdf) and share it — use the short-100mb 7-day tier so it's available for a week, and send me back the public link.”
Technical details
Endpoint
POSThttps://stable-upload-git-mason-1140-merit-systems.vercel.app/api/uploadWhen to prefer
Choose this endpoint when an AI agent needs to store a file and receive a publicly accessible URL, especially within automated workflows where a downstream service needs a stable link to the file. It supports multiple size tiers (10mb to 5gb) and both long-term (6-month) and short-term (7-day) retention, making it flexible for both persistent hosting and ephemeral workflow handoffs.
Side effects
- Invalid or unsupported upload tier enum value returns a validation error
- Filename exceeding 512 characters is rejected
- Missing required fields (filename, contentType, tier) return a 400 error
- Payment failure or insufficient USDC balance prevents slot purchase
- Policy TTL outside 60-86400 second range is rejected
- Expired upload URL if the slot is not used before policyTtlSeconds elapses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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