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    Repair CORS, Origins & Browser Requests

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    Repair CORS, Origins & Browser Requests is a bounded ToolForge Labs workflow.

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    Repair CORS, Origins & Browser Requests

    Repair CORS, Origins & Browser Requests

    Example session with this skill installed

    Our API works in curl but fails in the browser after moving behind a reverse proxy. Credentialed requests from two allowed origins fail preflight or lose cookies, and redirects behave differently. Repair the browser request boundary without using wildcard origins.

    • Read your context and instructions
    • Compiled the repair cors origins

    The likely failure is a contract mismatch around CORS, preflight requests, origins, credentials, cookies, redirects, proxy headers, caching, browser request modes, and cross-origin policy boundaries. I would reconstruct one canonical invariant, identify the layer violating it, apply the smallest bounded repair, and add deterministic boundary/failure/control tests. Existing security and product policy would be preserved. If repository files are available I can map the repair to exact paths; otherwise I would provide concrete pseudocode and a verification plan without claiming execution.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    Repair CORS, Origins & Browser Requests is a bounded ToolForge Labs workflow. Diagnose and repair CORS, preflight requests, origins, credentials, cookies, redirects, proxy headers, caching, browser request modes, and cross-origin policy boundaries. Works from repositories or partial logs/configuration. Produces bounded repair patterns and deterministic tests while preserving existing product/security policy and avoiding invented execution claims. It works from a full repository or partial evidence such as snippets, logs, configuration, traces, tickets, and architecture notes. The skill preserves existing product and security policy, separates verified facts from assumptions, avoids invented execution claims, and produces concrete repair or review steps with focused deterministic validation or traceable evidence.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for APIs & Backend.

    Cannot directly access or modify live production systems/CDNs. Requires repository access or logs to provide specific file-level edits.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before buying a skill.

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    Security scan passed 2 months ago

    Permissions

    Terminal / Shell
    Read Files
    Write Files

    Use a clean branch or a controlled review workspace. Supply repository files, logs, traces, configuration, or evidence needed for the task. Review all patches/findings before merge or operational action; keep production credentials and destructive production actions out of the workflow.

    Listed2 months ago
    Updated9 days ago

    What's inside

    Frequently Asked Questions

    This skill systematically analyzes HTTP request lifecycles to diagnose CORS, preflight, and SameSite cookie failures, providing deterministic repair patterns instead of insecure 'allow all' workarounds.

    You will receive the proprietary agent skill logic, a library of secure header configuration patterns, and a set of test fixtures to verify that the proposed fixes work in your specific environment.

    The skill provides implementation-ready code patterns for various proxies, CDNs, and backends, though it requires repository access to analyze your specific configuration and verify the fixes locally.

    It is compatible with all major LLMs and agent frameworks that support custom system instructions or tool-calling, making it easy to integrate into your existing development workflow.

    Yes, the skill is designed to handle complex multi-origin architectures, identifying exactly where headers are being stripped or corrupted by intermediaries like NGINX, Cloudflare, or AWS API Gateway.

    All buyers receive lifetime access to updates, which include new repair patterns for evolving browser security standards and updated SameSite cookie policy requirements.

    New in APIs & Backend