Mobile Api Recon Helper
Fast, accurate and free online mobile api recon helper tool running directly in your browser.
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Mobile API Recon Helper
This tool helps you analyze the list of API endpoints used by mobile applications. For each address, it checks the basic features (domain, path, parameters), tries to detect mobile tricks (e.g. dependence on User-Agent) and marks those endpoints that, from the perspective of simple reconnaissance, look poorly protected. Use only for legal security testing of your own systems.
Analysis settings
No obvious issues were found based on the HTTP response and URL structure alone. Remember that real security depends on backend logic and requires a more complete test.
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Mobile API Recon Helper is a lightweight, browser-based tool that helps organize mobile API reconnaissance by analyzing the list of endpoints used by mobile applications (Android, iOS) and suggesting which addresses look mobile, which may be poorly protected, and where the responses for the browser and the application differ significantly. In practice, you paste the captured URL from the proxy, click start and after a while you get a clear report that you can use during legal security tests of your own systems or as part of authorized bug bounty programs.
What Mobile API Recon Helper does under the hood
The tool collects all pasted API addresses, normalizes them, removes duplicates and treats them as a list of potential targets for analysis, and then performs a series of light, heuristic checks for each endpoint. Thanks to this, you will quickly see which URLs look typical for a mobile application, where you can see parameters that may indicate sensitive operations, and which responses may require deeper review in manual tests.
- Analyzes the URL structure and hostname, looking for patterns common to mobile APIs, such as subdomain types
m.,api,mobileor paths like this/mobile-api. - Checks the query path and parameters, looking for keywords like
login,auth,token,user,paymentand other names often associated with sensitive functions. - Optionally sends test HTTP requests with different User Agent headers, simulating traffic from a desktop browser and mobile application.
- It compares response codes, response size and content type, which helps you notice that, for example, a mobile client receives different data than a regular browser.
- Based on simple rules, it assigns an approximate risk level to endpoints: informational, low, medium or high.
- For those addresses that look particularly sensitive, it generates a draft cURL query that you can use for further testing within the legal scope.
Thanks to this, Mobile API Recon Helper works as a quick pre-filter that organizes the huge list of URLs and allows you to focus manual security tests where the probability of interesting finds is simply greater.
How to use Mobile API Recon Helper during testing
The tool's interface is intentionally simple because most of the work happens in the background in the heuristics layer, and the user should focus primarily on interpreting the results and planning subsequent test steps. The whole process consists of several repeatable movements that can be performed for subsequent mobile applications practically without changing habits.
- Capture mobile app traffic using your chosen proxy or network traffic analysis tool (for example, an HTTP proxy on a computer with a connected mobile device).
- Copy the API endpoints you are interested in from the proxy logs and paste them into the text field in the tool, each address on a separate line.
- Decide whether you want to perform test HTTP queries that compare the responses for User Agent desktop and mobile, or whether just analyzing the URL structure is enough at this stage.
- Click the start button and wait while Mobile API Recon Helper processes the list, counts unique endpoints and prepares a reconnaissance summary.
- Review the summary section, the endpoint table, and any draft cURL queries for addresses marked as potentially weak.
- Based on the report, decide which URLs are worth considering in the next phase of testing, remembering to operate only within legal and authorized scopes.
In practice, Mobile API Recon Helper speeds up what previously had to be done manually in a spreadsheet, notebook or simply in your head, especially in large mobile applications using many different API endpoints.
What heuristics does Mobile API Recon Helper use
The tool does not try to be a full-fledged vulnerability scanner, but a well-thought-out mobile API reconnaissance assistant that uses a specific set of simple but practical heuristics. Thanks to this, the report is quick, light and understandable, and at the same time indicates places where it is worth paying more attention during security analysis.
| Heuristics | What the tool checks | Why is it important for mobile API |
|---|---|---|
| Mobile patterns in hosts and paths | Presence of fragments likem., mobile, app-api, /mobile-api, /mapiand similar. |
Such addresses often point to endpoints designed mainly for mobile clients, which are maintained slightly differently than typical web APIs. |
| Keywords in the path | Analysis of word occurrenceslogin, auth, session, token, profile, paymentand similar. |
Endpoints with such names often handle logins, sessions, or financial operations, areas that require special attention in testing. |
| Query parameters | Searching for parameters of the typeuserId, accountId, phone, email, token, sessionId, page, limit. |
Parameters can expose pagination, filtering logic, or user IDs, which is useful for further designing authorization and permissions tests. |
| Compare desktop vs mobile responses | Send requests with different User Agent headers and compare responses in terms of code, size and overall structure. | Sometimes the endpoint for the browser returns nothing, but for the mobile application it is active, which may indicate differences in the authorization logic or traffic filtering. |
| HTTP response code | Reads codes of the type 200, 401, 403, 404, 500 and selected codes from the 3xx family. | Codes 200 for an unauthorized request may indicate easily accessible data, while 401 and 403 suggest that access control mechanisms are properly enabled. |
| The type of content returned by endpoint | Parsing theContent-Typeheader, specifically JSON, HTML, text, and binary formats. |
Public JSON without authorization headers can be a valuable source of API structure data, but it can also be a signal of potential data overexposure. |
| Response Size | Approximate response size comparison between different queries to the same endpoint. | A significantly larger response for one of the variants may suggest that under certain conditions the service returns more complete data or more detailed errors. |
| Risk Level Classification | Use a set of conditions to assign a label such as high, medium, low, or informational. | This division allows you to quickly arrange priorities and move from just a list of URLs to a logical queue of subsequent manual tests. |
Mobile API Recon Summary and Risk Assessment
The main strength of Mobile API Recon Helper is not just reading responses from endpoints, but how it presents the results, groups them and turns them into verifiable guidelines for further actions. Instead of a dry list of URLs, after scanning you get a synthetic summary, division into risk categories and a convenient table that you can quickly review or paste into a security test report.
In the results header, the tool shows the number of unique endpoints, the number of addresses with clear mobile-only characteristics, the number of endpoints with different responses for desktop and mobile, and how many of them were marked as potentially weakly protected. This shortcut helps you get a general picture of the situation without looking into the details of the table.
Each endpoint receives a risk level label, based on whether it returns data without authorization, whether it looks like a typical information endpoint, or whether the response is dominated by 401 or 403 codes. Thanks to this, you can immediately see where it is worth starting manual tests and which addresses can safely wait for a later stage of analysis.
Query sketches are generated in the form of cURL commands for selected addresses, especially those that seem more sensitive. This makes it easier to transfer tests to a terminal or other testing tools, of course only if you are operating fully legally and within the agreed scope of security testing.
What is Mobile API Recon Helper useful for in everyday work
Although the tool was created for mobile application reconnaissance, in practice it fits well in a variety of scenarios, from a single test for one application to the review of multiple services as part of a larger security program. Where you need to quickly structure dozens or hundreds of endpoints, Mobile API Recon Helper immediately shows its advantage over a regular notebook.
Usage scenarios in security testing and bug bounty
- Initial reconnaissance of the mobile API before a deeper pentest to better plan the order of tests and the scope of checked functions.
- Working in bug bounty programs, where you want to sort out the endpoints found in application traffic and focus on the most promising ones.
- Periodically review your own mobile applications, perhaps before a major update or as part of a regular security testing cycle.
- Support for development teams that want to quickly check what their API looks like from the perspective of mobile traffic and whether there are no unexpected responses.
In each of these scenarios, Mobile API Recon Helper helps you move from a chaotic list of addresses to a segregated set of endpoints with an assigned risk level, which significantly speeds up further analysis and reporting.
Legal and Responsible Use of
Like any security-related tool, Mobile API Recon Helper should only be used in a fully legal and ethical manner. This means that you only analyze your own systems, test environments or services for which you have explicit permission from the owner to perform security testing.
- Use the tool primarily for reconnaissance of API endpoints of applications for which you are organizationally or professionally responsible.
- If you are participating in a bug bounty program, make sure the domains and services you are reviewing are listed in the scope of the program.
- Use the generated PoC query sketches only for tests permitted by the regulations and arrangements with the system owner.
- Remember that the tool is not intended to bypass security measures, but to better understand them and detect vulnerabilities faster in a controlled environment.
This approach makes Mobile API Recon Helper a natural element of the security culture, where testing is not treated as hunting for vulnerabilities, but as a way to strengthen the quality and stability of mobile applications.
Frequently asked questions about Mobile API Recon Helper
Where to get API endpoints that are worth pasting into the tool
Most often, the list of API endpoints comes from proxy logs or another tool that you use to analyze mobile application traffic when logging in, clicking on screens or performing specific actions. A good idea is to capture traffic from several application usage scenarios, then filter only those addresses that are actually responsible for communicating with the backend, and then paste them one by one into Mobile API Recon Helper.
Does Mobile API Recon Helper send real HTTP requests to endpoints
Yes, if you check the appropriate option, the tool will perform lightweight HTTP queries using different User Agent headers for the desktop and mobile variants, which helps you compare responses. This type of traffic is comparable to manually refreshing the page or calling the endpoint in the browser, but it is still worth using the tool only in environments and domains for which you have consent to security tests.
Does the tool replace a full mobile application pentest
No, Mobile API Recon Helper does not replace full penetration testing or a detailed security audit, but is a convenient and quick initial step. Its task is to help you spot interesting endpoints, suggest the level of risk and prepare query sketches, and not to carry out the entire analysis of business logic and authorization mechanisms in all application paths for you.
Can I use the report from Mobile API Recon Helper in the official report
By all means, you can include the prepared summaries, table with endpoints and query sketches in the security testing documentation. It is only worth describing in the report that this is a stage of mobile API reconnaissance and that the next steps of manual tests and more advanced analyzes have been planned on its basis.
Speed up mobile API reconnaissance with Mobile API Recon Helper
Paste a list of endpoints captured from mobile application traffic, run the analysis and see which addresses appear to be mobile, which may be poorly protected, and where the desktop and mobile responses differ significantly. One report is enough to better plan the sequence of security tests and use the time for really important scenarios.