Skip to content

CORS Debugger

CORS Debugger

Interpret CORS errors and propose concrete fixes.

Output

Run the tool to see output.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Programmatic Access

CORS Debugger is also callable as a free HTTP JSON API at https://aidevhub.io/api/cors-debugger/ — GET with query parameters or POST with a JSON body, no authentication, CORS enabled, 50 requests/day per IP. Responses return { ok, tool, result, meta }. 

curl -s -X POST https://aidevhub.io/api/cors-debugger/ \
  -H "Content-Type: application/json" \
  -d '{"error":"Access to fetch at https://api.example.com from origin https://app.example.com has been blocked by CORS policy: No Access-Control-Allow-Origin header is present."}'

Machine-readable contract: /api/tool/cors-debugger.json All API endpoints: /agents/ LLM site index: /llms.txt

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/cors-debugger/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/cors-debugger/ GET cors-debugger
POST /api/cors-debugger/ POST cors-debugger

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=cors-debugger&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: 60 req / 60s, input max 128 KB.

How to Use CORS Debugger

  1. 1

    Prepare your input

    Collect the source text or structured payload you want to process and paste it into the tool input fields.

  2. 2

    Select mode and run

    Choose the relevant mode (if available) and click Run to execute the deterministic transformation.

  3. 3

    Review warnings and output

    Check warnings, validation notes, and generated output before using the result in production workflows.

  4. 4

    Copy and integrate

    Copy the generated output and apply it in your project, API flow, or documentation pipeline.

Frequently Asked Questions

What is CORS Debugger?
CORS Debugger is a free browser-based utility on AI Dev Hub. Analyze CORS failures and output concrete server-side fixes.