Secure API Key Testing Tool
Verify and audit API keys with real-time data fetching. For bug bounty hunters and developers who authorize privacy and security.
What is API Key Testing?
API Key Testing is a critical security practice for validating endpoints, checking for Information Disclosure, and ensuring Least Privilege Access. By using this validator, security researchers can identify if a leaked or discovered key grants access to unauthorized data or administrative functions.
fetch() requests. Your API keys are never transmitted to our servers, keeping your research 100% private.
Live API Key Testing Validator
Live Response Data:
// Connection results will be displayed here...
Using API Testing for Bug Bounties
Enhance your security reports by verifying the following impact areas:
- Excessive Data Exposure: Check if the key returns more fields than necessary.
- Broken Object Level Authorization (BOLA): Test if the key can access other users' data.
- Improper Assets Management: Identify keys that access deprecated or shadow API versions.
- Rate Limit Verification: See how the API handles multiple rapid requests.
- Information Disclosure: Detect if APIs are leaking sensitive information in responses
Frequently Asked Questions
How does this API tester ensure my key is safe?
Unlike other online tools that process requests on their servers, this tool runs entirely in your browser. When you click 'Validate', your computer talks directly to the API provider. We have no backend code that sees your input.
Do you store my API keys during testing?
Absolutely NOT! We never store, log, or transmit your API keys or any sensitive data. All API requests are made directly from your browser to the target API endpoint. Your credentials remain completely private and secure on your device.
Why does the tool show a CORS error?
CORS (Cross-Origin Resource Sharing) is a browser security policy. If the API provider doesn't allow web-based requests from third-party domains, your browser will block the response. This is common for private APIs. To bypass this for testing, you may need a browser extension or a local proxy.
What is a Bearer Token?
A Bearer Token is a security token that allows the "bearer" to access a specific API. It is usually sent in the HTTP header as Authorization: Bearer , which is the method this tool currently uses.
How can I use this tool for bug bounty hunting?
This tool is perfect for bug bounty hunting as it allows you to test API keys against live endpoints to identify security vulnerabilities such as excessive permissions, information disclosure, broken authentication, or missing rate limiting. Always ensure you have proper authorization before testing any API.