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I need a seasoned backend developer who can dive into the Goethe website, watch the traffic, and uncover the private APIs it relies on. The assignment revolves around pure data extraction: I’m not after public pages or scraped HTML—I want the actual endpoints, request patterns, headers, tokens, and any quirks the site uses to return its data. The ultimate purpose is research, so accuracy and completeness matter more than production-ready code. What makes this tricky is that nothing is documented. You’ll be inspecting XHR calls in the browser, replaying them with tools such as Postman, cURL, or mitmproxy, and reverse-engineering whatever signature or authentication flow the Goethe backend expects. If rate limits, CSRF tokens, or session cookies come into play, I’ll count on you to map those out too. Deliverables • A concise report (Markdown or PDF) listing every discovered endpoint, required parameters, authentication steps, and typical response structures. • A working Postman (or similar) collection that reproduces each call successfully. • Optional but appreciated: a small proof-of-concept script in Python or Node.js that fetches one endpoint end-to-end. Acceptance criteria 1. All endpoints return the same data in your demo as they do inside the live site. 2. No manual browser interaction needed once cookies or tokens are captured per your documentation. 3. Clear explanation of any limitations (rate limits, IP blocks, time-sensitive tokens). Please bid only if you have a verified history of API discovery or reverse engineering. When you reply, briefly outline a comparable project you solved and the primary tools you used.
ID do Projeto: 40141029
21 propostas
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Ativo há 14 dias
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21 freelancers estão ofertando em média ₹7.065 INR for esse trabalho

Hi jinset1. I am very excited with your project because I have completed similar project recently. The skills required for your project are my main specialty. I can handle this perfectly and have abundent experiences. Please confirm that I am one of the best fits for you and drop me a message for further discussion. Thanks and Best Regards. Brayan Stiven A.
₹7.000 INR em 5 dias
4,7
4,7

Hi, This is not a scraping task—it’s an API discovery and reverse-engineering problem, and that distinction matters. The risk in projects like this is incomplete mapping: endpoints that “work once” but fail when tokens rotate, sessions expire, or rate limits kick in. My focus is accuracy and repeatability. I have hands-on experience discovering undocumented backend APIs by inspecting browser traffic and reconstructing request flows end-to-end. My workflow typically involves deep inspection of XHR/fetch calls, followed by controlled replay using Postman, cURL, and mitmproxy to isolate required headers, cookies, CSRF tokens, signatures, and timing constraints. For this assignment, I would: Observe and catalogue all relevant network calls the Goethe site uses to fetch data Identify authentication/session mechanisms, token lifecycles, and rate-limit behavior Reproduce each endpoint outside the browser with documented prerequisites Clearly note any quirks, dependencies, or limitations (IP sensitivity, expiry windows, etc.) Deliverables will be clean and research-ready: A concise Markdown/PDF report listing endpoints, parameters, auth steps, and response structures A working Postman collection that successfully reproduces every call Optional Python or Node.js proof-of-concept for at least one endpoint I’ve solved similar API discovery tasks involving undocumented XHR backends using Chrome DevTools, mitmproxy, Postman, and scripted replays.
₹12.000 INR em 7 dias
4,4
4,4

Hello, I understand you need a seasoned backend developer to extract hidden APIs from the Goethe website for research purposes. This is a fascinating challenge that requires deep technical expertise, and I am well-equipped to tackle it. In my previous role, I successfully uncovered and documented multiple private API endpoints for a financial services platform. Utilizing tools like Postman, cURL, and mitmproxy, I not only identified endpoints but also mapped out intricate authentication flows and response structures. ✅My Plan - Analyze XHR calls to pinpoint hidden API endpoints. - Utilize Postman and other tools to replicate requests accurately. - Document each endpoint with parameters, authentication, and response structures in a concise report. - Create a Postman collection for seamless testing. - Optionally, provide a small proof-of-concept script in Python or Node.js. Could you please elaborate on any specific challenges you expect, such as rate limits or authentication complexities? Additionally, are there particular tools you prefer for testing? Best regards, Hongqiang Chen
₹7.770 INR em 1 dia
3,6
3,6

Hello, I hope you are doing well. I’m a backend developer with extensive experience in API discovery, data extraction, and security-focused audits. I focus on understanding data flows, authentication patterns, and producing clean documentation rather than quick hacks. In a sanctioned engagement, I mapped private endpoints and authentication flows for a partner API, detailing endpoints, required parameters, headers, and typical responses. I used Postman, mitmproxy, and curl to reproduce calls end-to-end and validate results, delivering a reproducible Postman collection without exposing private data. If authorized with a defined scope, I can start immediately and deliver a comprehensive report and a working Postman collection within 5 days. I guarantee accuracy and thoroughness. Please feel free to contact me so we can discuss more details. I am looking forward to the chance of working together. Best regards, Billy Bryan
₹7.770 INR em 1 dia
3,7
3,7

Hey jinset1, How are you! I've carefully checked your requirements and really interested in this job. I'm a full stack Javascript developer working at large-scale apps as a lead developer with U.S. and European teams. I'm offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I'm well versed in React/Redux, Angular JS, VueJS, Node JS, Python, html/css as well as javascript and jquery. Simply, I have rich experienced in JavaScript, Software Architecture, cURL, Data Scraping, Data Extraction, API, Backend Development, Reverse Engineering as you enumrated. For more information about me, please refer to my portfolios. I'm ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details. Thanks & Regards, Dragan M.
₹7.000 INR em 5 dias
2,0
2,0

Hello, I can help with API discovery and reverse engineering for the Goethe website, focusing on identifying the actual private endpoints, request patterns, headers, tokens, and authentication flows used by the site. I have prior experience reverse‑engineering undocumented web APIs by inspecting XHR traffic and reproducing calls using Chrome DevTools, Postman, cURL, and mitmproxy. In similar projects, I’ve mapped CSRF/session handling, rate limits, and signature quirks, then delivered reproducible Postman collections and clear technical reports for research use. I will provide: A concise report documenting all discovered endpoints, parameters, auth/token flow, and response structures A working Postman collection reproducing each call outside the browser (Optional) a small Python or Node.js PoC demonstrating end‑to‑end access Clear notes on limitations such as rate limits, IP blocks, or token expiry Accuracy and completeness will be the priority, and all demo calls will match live site responses. Best regards, Raj M
₹5.000 INR em 7 dias
2,2
2,2

Hi I have experience analyzing web traffic to identify undocumented APIs, including request patterns, headers, tokens, and authentication flows for research purposes. I work carefully with tools like browser devtools, Postman, and mitmproxy to document endpoints accurately and explain limits or quirks clearly. I’d be glad to deliver a precise report and reproducible collections that mirror live site behavior for your study. Giang V
₹4.000 INR em 3 dias
2,1
2,1

I can help you reverse-engineer the Goethe website's hidden APIs. This is methodical detective work: intercepting XHR calls, tracing authentication flows, and documenting every endpoint until we have a complete map of how their backend actually serves data. The tricky parts I anticipate: Goethe sites often use dynamic CSRF tokens that rotate per session, and some endpoints may require a valid login state before revealing themselves. I'll trace the full authentication chain—cookies, headers, token refresh logic—so your documentation captures the complete flow, not just surface-level endpoints. If they're using Cloudflare or similar protection, I'll identify which requests trigger bot detection and document the exact headers and timing patterns needed to replicate calls cleanly outside the browser. My approach: browser DevTools for initial discovery, mitmproxy for deeper traffic inspection, then validate everything with cURL/Postman before documenting. You'll get a clean Markdown report plus a working collection that reproduces each call independently. I'll also flag any endpoints that use time-sensitive signatures or session-bound tokens so you know which calls require fresh authentication versus which can run indefinitely.
₹7.000 INR em 7 dias
2,1
2,1

Hi , I just went through the project description, and I see you are looking for someone experienced in cURL, JavaScript, Data Scraping, Backend Development, API, Reverse Engineering, Data Extraction and Software Architecture. It instantly reminded me of a client who faced similar challenges, and I knew I had a tailor-made solution for it. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: • Is there anything else you’d like to add to the project details? • What’s the top hurdle you’re facing with this project? • What is the timeline to get this done? Why Choose Me? 250+ Projects. 5 Years. Zero Misses. My reputation is built on a single metric: Flawless Execution. While others promise quality, my last 100+ consecutive 5-star reviews prove it. I don’t just finish the job; I set the standard. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) The portfolio here is just the tip of the iceberg. To respect client confidentiality, my recent heavy-hitters aren't public, but I can share them 1-on-1. Click the 'Chat' button, and I’ll send over the relevant samples immediately for your review. Regards, Abdul Haseeb Siddiqui.
₹1.500 INR em 5 dias
3,1
3,1

Hi there, I understand your need for a skilled backend developer to delve into the intricacies of the Goethe website and uncover its private APIs for data extraction. My experience in API discovery and reverse engineering, coupled with my proficiency in tools like Postman and cURL, makes me a perfect fit for this task. In a similar project, I successfully reverse-engineered an undocumented API for a major e-commerce platform using a combination of browser inspection and Postman. My strategic approach involves thorough endpoint discovery and detailed documentation, ensuring accuracy and completeness in the results. Let's collaborate on unraveling the mysteries of the Goethe website. I'm available to start immediately. Best, Zaheer Mahomed
₹8.250 INR em 30 dias
0,0
0,0

Hey , I just finished reading the job description and I see you are looking for someone experienced in Data Scraping, Software Architecture, cURL, API, Backend Development, Data Extraction, JavaScript and Reverse Engineering. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? Deliver high-quality work with a strong focus on accuracy, efficiency, and client objectives. Maintain a proven record of long-term client satisfaction with consistently positive feedback. Earn 5-star ratings on recent projects, reflecting reliability and clear communication. Work with a structured, detail-oriented approach to ensure timely and accurate delivery. Availability: Full-time freelancer with flexible availability and fast response times (Eastern Time). I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further. Regards, Hassan.
₹1.500 INR em 5 dias
0,0
0,0

Hi Innocent W., I understand you require a seasoned backend developer to uncover the private APIs of the Goethe website, focusing exclusively on accurate data extraction. My expertise in reverse engineering and API discovery will allow me to effectively analyze XHR calls and identify the necessary endpoints and authentication methods. With over 7 years of experience in JavaScript, Software Architecture, cURL, Data Scraping, Data Extraction, API, and Backend Development, I have successfully completed similar projects where I reverse-engineered APIs to extract data in real-time under challenging conditions. I provide a comprehensive report detailing every endpoint and required parameters, along with a working Postman collection to replicate each call. For your reference, please find my portfolio below: https://www.freelancer.com/u/KanzahAfaqAhmad I look forward to the opportunity to collaborate on this exciting project. Thank you, Regards, Kanzah Afaq
₹12.500 INR em 7 dias
0,0
0,0

Hi there, You want a precise map of Goethe’s private APIs and authentication flow to enable accurate data extraction for research, not just scraping HTML or public endpoints. I bring 13+ years as a Senior Software Architect specializing in backend, cloud-native systems (AWS, Azure, GCP), microservices, DevOps, and AI/GenAI. I’ve led API-discovery and reverse‑engineering efforts for data‑heavy domains, delivering endpoint inventories, headers, tokens, and authentication steps, plus reproducible Postman collections and lightweight PoC scripts. I’m proficient with inspecting XHR traffic, mitmproxy, curl, and Python/Node tooling to capture signatures, CSRF behavior, and session cookies with high fidelity. My approach: start with a focused discovery phase to enumerate endpoints, required parameters, and headers; produce a concise report (Markdown/PDF) and a Postman collection that reproduces each call; document limitations (rate limits, IP blocks, time-sensitive tokens). An optional small PoC script can fetch one endpoint end-to-end. If this aligns with what you’re looking for, I can start with a short technical discussion or a small milestone to validate the approach. Best regards,
₹18.035 INR em 6 dias
0,0
0,0

This is exactly the kind of work I enjoy doing — projects like this combine precision and creativity, and I make sure both show through in every detail. With a proven track record in API discovery and reverse engineering, I excel in uncovering undocumented endpoints, authentication flows, and request patterns. My ability to deliver high-quality results, communicate clearly, and maintain smooth processes align perfectly with your requirements. I am happy to offer insights regardless of the decision to hire. Kind regards, Melissa Pringle.
₹6.250 INR em 7 dias
0,0
0,0

Hey there! Greetings! Thanks for stopping by! If you’re looking for a passionate API Developer & Integration Expert who can connect your systems into one powerful, seamless workflow — you’re in the right place! I can bring success to your project of "Extract Hidden Goethe Website APIs" and I can assure you that I can complete the Project within the given Timeline and given Cost Structure! With 12+ years of experience and 50+ successful projects, I specialize in building and integrating robust, secure, and scalable APIs that power modern web & mobile applications. API & Integration Expertise: REST | SOAP | GraphQL | 3rd-Party APIs | Payment Gateways | CRM/ERP | OAuth | Webhooks | Microservices Tech Stack: PHP, Laravel, CodeIgniter, Node.js, Python, MySQL, MongoDB, Vue.js — ensuring smooth data flow and high performance across platforms. Portfolio: https://www.freelancer.com/u/AvdheshKushwaha I focus on building APIs that are not just functional, but reliable, scalable, and future-ready — with clear communication and on-time delivery. Let’s integrate your systems and make your product smarter! Cheers, Avdhesh
₹3.000 INR em 3 dias
0,0
0,0

Hi, “I can give you satisfactory results.” I understand exactly what you’re looking for: not page scraping, but a clean breakdown of the real, internal APIs the Goethe site uses to serve its data. I can analyze the site by monitoring network traffic (XHR/fetch), tracing request flows, and replaying them outside the browser using tools like Chrome DevTools, mitmproxy, Postman, cURL, and custom scripts. I’ll identify all active endpoints, required headers, payload formats, cookies, CSRF or session tokens, and any rate-limit or signature behavior involved. Where authentication or time-based tokens are used, I’ll document how they’re issued and how long they remain valid. The final delivery will include a clear, beginner-friendly report listing each endpoint, parameters, auth steps, and sample responses, plus a working Postman collection that reproduces the same data returned by the live site. If helpful, I can also include a small Python or Node.js proof-of-concept showing one endpoint fetched end-to-end without browser interaction. I have 11+ years of backend experience and have done similar API discovery work on undocumented platforms using DevTools, mitmproxy, Postman, and scripted replay for research and integration analysis. I’m happy to explain limitations, edge cases, and anything that could affect reliability. Best regards, Maksym
₹7.000 INR em 7 dias
0,0
0,0

Hi, I saw you run a Goethe website API discovery project, and it caught my eye because I recently finished a similar project where I identified and documented private endpoints for a complex e-commerce platform with full authentication mapping. I understand the project guidelines and I’ve developed a workflow that ensures deadlines are met without sacrificing the quality of the final output by capturing all request patterns, headers, tokens, and replaying calls with tools like Postman and mitmproxy. I run a small creative team and our skill set matches your projects requirements, including API reverse engineering, traffic inspection, and script development. I’m available to hop on a chat or exchange messages to discuss how we can get started on this immediately. When would be a good time for us to connect? Regards, Bjork Bronkhorst
₹9.400 INR em 7 dias
0,0
0,0

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