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    Repair Signed URL Expiry Bugs

    1

    Repair presigned upload and download URLs that expire too early, fail behind proxies, reject valid headers, or remain usable longer than intended.

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    Repair Signed URL Expiry Bugs

    Repair Signed URL Expiry Bugs

    Example session with this skill installed

    My S3 presigned upload URLs are failing with SignatureDoesNotMatch when users upload from our mobile app. Can you fix the signing logic and add a test?

    • Read your context and instructions
    • Compiled the repair signed url

    I have updated the S3 signing service to include the Content-Type header in the canonical request and synced it with the mobile client. I also added a Vitest suite using a fake clock to verify the URL expires exactly after 15 minutes. Updated: s3-signer.ts, upload-service.test.ts.

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    About this skill

    Repair presigned upload and download URLs that expire too early, fail behind proxies, reject valid headers, or remain usable longer than intended.

    This skill traces signing inputs, TTL, clocks, methods, headers, storage, CDN behavior, and client timing. It adds bounded expiry, regeneration, canonical request checks, safe caching, and deterministic tests.

    • Stop mid-flow expiry
    • Fix signature mismatches
    • Prevent stale link caching
    • Verify safe regeneration

    Ideal for SaaS, storage, uploads, and media apps.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse All Claude Skills.

    • Cannot fix provider-side outages or service-level limitations.
    • Requires access to both signing logic and client-side implementation for full repair.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

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    3. 3

      Ask for what you need

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    Permissions

    Terminal / Shell
    Read Files
    Write Files

    Permissions are limited to the active local workspace and are used to inspect project files, create or modify bounded fixes, tests and documentation, and run repository-supported local tests, checks, builds, simulations, mocks, or emulators. The skill package does not require bundled credentials, unrestricted external network access, or automatic production changes.

    Listed3 months ago
    Updated9 days ago

    What's inside

    Frequently Asked Questions

    It identifies mismatched headers, incorrect canonical paths, and clock skew issues that trigger the SignatureDoesNotMatch error.

    The skill implements bounded TTLs and server-side regeneration logic to ensure URLs remain valid for the duration of the user action.

    Yes, it traces how proxies or CDNs might be stripping headers or rewriting paths that are part of the signed request.