Presigned URLs

A presigned URL is a temporary public hostname that routes traffic to a specific port inside a sandbox.

The URL format is: https://<token>.leap0.app

The token is only returned once when the URL is created. Leap0 stores only a SHA-256 hash of that token server-side.

Create a presigned URL

Create a presigned URL with:

from leap0 import Leap0Client

client = Leap0Client()
sandbox = client.sandboxes.create()

presigned_url = sandbox.create_presigned_url(port=8080, expires_in=900)

print(presigned_url.id)
print(presigned_url.url)
# Treat the token as a secret. Do not log or commit it.
token = presigned_url.token
client.close()

import { Leap0Client } from "leap0";

const client = new Leap0Client();
const sandbox = await client.sandboxes.create();

const presignedUrl = await sandbox.createPresignedUrl(8080, 900);

console.log(presignedUrl.id);
console.log(presignedUrl.url);
// Treat the token as a secret. Do not log or commit it.
const token = presignedUrl.token;
await client.close();

Delete a presigned URL

Revoke a URL with:

from leap0 import Leap0Client

client = Leap0Client()
sandbox = client.sandboxes.create()

presigned_url = sandbox.create_presigned_url(port=8080)
sandbox.delete_presigned_url(presigned_url.id)
client.close()

import { Leap0Client } from "leap0";

const client = new Leap0Client();
const sandbox = await client.sandboxes.create();

const presignedUrl = await sandbox.createPresignedUrl(8080);
await sandbox.deletePresignedUrl(presignedUrl.id);
await client.close();

Notes

Presigned URLs are public and do not require an API key.
Treat presigned URLs and their one-time tokens as secrets. Avoid logging or committing them.
Each URL maps to one sandbox port.
Expired URLs stop resolving automatically.
If the sandbox is paused, Leap0 resumes it before proxying the request.

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Create a presigned URL

Delete a presigned URL

Notes

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