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My REST API is already live and functional; the only thing missing is a solid authentication layer. I want to introduce OAuth 2.0 using the Client Credentials grant so that every request is verified through access tokens issued to trusted machine-to-machine clients.
Project ID: 40409617
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Active 18 days ago
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hi i can modify the api today for even i can provide you the solution asap let me know please i am ready to start work
$100 USD in 1 day
2.0
2.0
71 freelancers are bidding on average $118 USD for this job

Hi, I have hands-on experience implementing OAuth 2.0 Client Credentials flow for production REST APIs, including JWT access token issuance, scope-based authorization, token introspection, and rotating client secrets for machine-to-machine clients. For this project, I'll add a secure OAuth 2.0 layer to your live API with a token endpoint, signed JWT validation middleware, scope enforcement per route, and proper 401/403 handling without disrupting existing functionality. You can expect clear communication, fast turnaround, and a high-quality result that fits seamlessly into your existing workflow. Best regards, Juan
$140 USD in 1 day
5.4
5.4

Hello Dear! Greetings from Toriqul Global Solutions! We are pleased to introduce our company as a reliable and experienced provider of Web Design & Development services. Founded and led by Engineer Toriqul Islam, a B.Sc. graduate in Computer Science & Engineering from Rajshahi University of Engineering & Technology (RUET), our team brings over 10 years of industry experience. At Toriqul Global Solutions, we specialize in building modern, user-friendly, and high-performance websites that help businesses grow and stand out in the digital world. Our design approach focuses on simplicity, elegance, and functionality to ensure maximum user engagement. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication We would be honored to discuss your project requirements and help bring your ideas to life. Thank you for your time and consideration. Warm Regards, Toriqul Global Solutions
$70 USD in 4 days
5.3
5.3

Hello, I can add a secure OAuth 2.0 Client Credentials authentication layer to your existing REST API without disrupting your current endpoints. I will implement a token issuing service that validates trusted clients and returns signed access tokens. Each API request will be protected with middleware that verifies and scopes tokens before allowing access. I will ensure proper expiry, rotation, and secure storage of secrets for machine to machine authentication. The solution will be lightweight and compatible with your existing API structure. I can implement this using Node.js, Laravel, or your current backend stack depending on what you are using. You will get clear documentation for issuing clients, generating tokens, and securing endpoints. Timeline is typically 1 to 2 days for full implementation and testing.
$120 USD in 7 days
5.0
5.0

Hi, Have you already set up the initial framework for implementing OAuth 2.0 in your existing API? I can help you add a solid authentication layer using the Client Credentials grant. Based on your project, I’ll implement the necessary configuration to issue access tokens for your trusted clients, ensuring that every request gets validated seamlessly. I’ve worked extensively with REST APIs and have hands-on experience with OAuth 2.0 integrations. After implementing the authentication, I’ll conduct testing to guarantee everything functions as expected. I’m available to jump on a call if you want to discuss it further. Let me know if you’re ready to kick this off! Best Regards,
$200 USD in 5 days
4.4
4.4

Hi, I saw your need to add OAuth2 with client credentials to your existing OpenEMR API. It sounds straightforward since your API is already live and just needs proper token checks. I’ve added similar flows to medical systems before, so I’m comfortable handling the security side. I’d set it up cleanly so trusted machine clients request tokens and every call hits the verifier. Steps: • Add token endpoint with client credential flow • Store and validate client secrets • Wrap your endpoints with middleware checking access tokens • Provide simple cURL examples for testing I can start right away and this should move fast once I see your current structure. Do you already have a preferred place in your API stack where the token validation middleware should live? Greetings, Slavko
$200 USD in 5 days
4.4
4.4

Hello, I understand that you are looking to enhance your existing REST API with a robust authentication layer using OAuth 2.0, specifically the Client Credentials grant. This is a critical step to ensure secure communication between your machine-to-machine clients. With over five years of experience in developing and securing RESTful APIs, I have successfully implemented OAuth 2.0 for various applications, ensuring that access tokens are issued correctly and efficiently. I am well-versed in technologies such as Node.js and Express, which I believe align with your current setup. To complete this project, I would take the following steps: - Assess your current API architecture to ensure seamless integration of the OAuth 2.0 framework. - Implement the Client Credentials grant flow to issue access tokens to your authorized clients. - Conduct thorough testing to confirm that the authentication layer is secure and functional. - Provide documentation detailing the implementation for future reference and maintenance. I am eager to start this project and confident in my ability to deliver reliable results that meet your requirements. Please feel free to reach out so we can discuss this further and get started right away. Thank you!
$30 USD in 7 days
4.5
4.5

Hey , I just finished reading the job description and I see you are looking for someone experienced in Software Development, API Integration, API Testing, cURL, API Development, REST API, Security, RESTful, Web Services and OAuth. 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? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am- 9pm Eastern Time (I work as a full time freelancer) 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, Adil Yousuf
$30 USD in 4 days
4.1
4.1

Hi there, ❤️❤️❤️ I’ve reviewed your OpenEMR REST API project and it aligns well with my experience in API security, OAuth 2.0, and RESTful integrations. I can help you add a secure Client Credentials authentication layer so trusted machine-to-machine clients can access your API using verified access tokens. How I can help: • Implement OAuth 2.0 Client Credentials flow for your existing live API • Add token validation/middleware to protect every request without disrupting current functionality • Test endpoints with cURL/API tools and document usage for client credentials and bearer tokens Relevant experience: I’ve worked on similar REST API security projects involving OAuth, access tokens, web services, and API testing, and I can start working immediately. Approach: I focus on secure, maintainable implementation, clear communication, and careful testing to keep your live API stable. I’d be happy to discuss your requirements in more detail and get started right away. Best regards,
$180 USD in 4 days
4.0
4.0

As an experienced web developer with a strong command over multiple programming languages like C#, JavaScript, TypeScript, Python and PHP, I believe I could add significant value to your project where you require assistance in the REST API migration to introduce OAuth 2.0 using the Client Credentials grant. My ability to work with diverse API integrations and automation tools like N8N makes me well-tuned to provide comprehensive end-to-end solutions tailored to specific client needs. My previous experience in developing complex, high-performance web applications using technologies such as Node.js, Express, React and more could easily be leveraged for enriching your OpenEMR API as required. I also have dexterity over mobile app development with React Native and Expo which magnifies my adaptability quotient and ensures my merge effortlessly with any of your dynamic requirements. The combination of my comprehensive understanding of application architecture, both front-end and back-end, along with my focus on efficiency, scalability and maintainability make me confident about not just providing the authentication layer but also optimizing the existing functionality. Through a collaboration on your project, let's ensure that security takes precedence while performance is never compromised. Choose me today to optimize, secure and scale up your API environment!
$200 USD in 3 days
3.5
3.5

Having worked extensively with API Integration and REST API development, I am confident in my ability to modify your existing API for OpenEMR with an appropriate and smart authentication layer. Implementing OAuth 2.0 using the Client Credentials grant is a bread-and-butter task in which I have considerable expertise. My experience in creating secure and scalable Node.js backends, as well as building applications that are meant for real users and real business goals with Modern React applications, will significantly benefit your requirements. I never jump straight into writing code; rather my approach is to comprehend the unique needs of your project. By understanding your business goals and your desired outcomes thoroughly, I'll be able to recommend the best possible solutions for your API integration needs. This approach has enabled me to create maintainable solutions that improve performance, conversion and long-term stability. Choosing me means choosing quality: quality design, quality communication, and quality code. I focus on delivering value to my clients by providing scalable and reliable solutions that not only meet immediate requirements but also cater for future growth. So if you seek a trustworthy professional who can deliver on time and within budget FAQs? do get in touch; together we'll build something incredible!
$250 USD in 7 days
3.5
3.5

Hello, Implementing a robust authentication layer introduces several challenges. Ensuring the security of access tokens is critical, particularly in a machine-to-machine context. Additionally, the architecture must effectively handle token issuance and verification without impacting the performance of the existing API. What specific security measures do you envision for protecting the access tokens? Will the current infrastructure support the necessary changes for token management, or will it require a redesign? Are there specific compliance requirements or security standards that need to be adhered to for the authentication flow? I look forward to discussing the architecture further.
$30 USD in 7 days
3.1
3.1

Hi, I can help you integrate OAuth 2.0 using the Client Credentials grant, ensuring that every request is verified properly. With 8+ years of experience in REST API development and a strong background in security protocols, I can implement this smoothly. Once the integration is complete, you’ll have a reliable authentication process for your machine-to-machine communications. I’m available for a quick call to discuss how we can proceed. Looking forward to your response! Best Regards, Priyanka
$140 USD in 2 days
3.0
3.0

Hello, I understand you need a secure OAuth 2.0 Client Credentials flow added to your existing REST API for OpenEMR, ensuring every request carries a verifiable access token issued to trusted M2M clients. I can deliver a robust, standards-compliant authentication layer with minimal disruption to current endpoints. Solution approach: - Implement OAuth 2.0 server (Client Credentials) with a dedicated token endpoint, using JWT access tokens signed for integrity. - Define client registration, scopes, and token lifetimes tuned to your OpenEMR use cases. - Add token validation middleware on all API routes, with optional caching of token introspection results. - Support token rotation, revocation, and audit logs for issued tokens. - Provide clear developer docs and curl examples for requesting tokens and calling resources. - Automated security tests (token issuance, expired tokens, invalid signatures, scope checks). Deliverables: - OAuth 2.0 authorization server module integrated with your API - Middleware for token verification on all endpoints - Client registration and scope management UI or config (as preferred) - Full test suite and documentation - Migration plan with minimal downtime Budget & timeline: - Budget: 220 USD - Timeline: 5 days from project start, with milestones for token endpoint, middleware, testing, and documentation I’m a Full-Stack Digital Expert with strong API, security, and RESTful design experience. I can ensure this integrates cleanly with OpenEMR and
$190 USD in 3 days
2.6
2.6

You need to enhance your existing REST API with a solid authentication layer using OAuth 2.0. Here is exactly what I would build: Authentication layer: I will implement OAuth 2.0 with Client Credentials grant, ensuring that every request is verified through access tokens. This will secure your API and allow only trusted machine-to-machine clients to access it. Token management: I will set up a secure mechanism for issuing and validating access tokens, ensuring they are handled properly and expire as needed to maintain security. Testing: Comprehensive API testing will be conducted to ensure that the authentication layer works seamlessly with existing endpoints and that unauthorized requests are properly rejected. Timeline: 1 day. Do you have any specific requirements for token expiration or revocation policies that I should consider during implementation?
$96 USD in 1 day
2.3
2.3

Hello, In my opinion, the problem of this project is that the current authentication mechanism lacks the security and verification provided by OAuth 2.0. I will implement OAuth 2.0 using the Client Credentials grant by setting up an authorization server to issue access tokens. The API will validate these tokens for each request to ensure only authorized clients can access the resources. I will ensure consistent token handling across all endpoints and handle edge cases such as token expiration and revocation without altering existing functionality. The deliverable will be a fully integrated OAuth 2.0 authentication layer, with updated API documentation and test cases to verify the implementation. I have successfully integrated OAuth 2.0 in multiple projects, ensuring robust security. I can start immediately. Regards.
$140 USD in 7 days
2.3
2.3

Hi, I can fix your OpenEMR REST API authentication I've solved this exact problem many times. Here is what I will do: Implement OAuth 2.0 Client Credentials flow for trusted machine-to-machine access. Secure every API endpoint by validating access tokens on each request. Test the integration with cURL and provide clean API usage notes. 10 days free support after delivery Milestone-based payment Reply "YES" and Best regards, syed ribal
$30 USD in 5 days
2.0
2.0

Hello, I am a Senior Full Stack Developer with over 10 years of experience in the React, Django REST, and PostgreSQL field. I understand you need a multi tenant SaaS platform for device leasing with full device lifecycle control, secure billing, and automated locking based on payment status. The system must be reliable, scalable, and fully independent from third party MDM fees. I will build a clean architecture where each tenant is isolated, with flexible store management and strict role based access. The MDM layer will integrate Apple Business Manager and Android Management API to handle provisioning, locking, and syncing device states in real time. For billing, I will implement Stripe with webhook based validation to trigger instant device lock or unlock. Contracts will be generated dynamically with digital signatures and stored securely. The backend will use Django REST with optimized APIs and background workers for tasks like payment checks and device actions. The frontend in React will provide fast dashboards, clear revenue insights, and smooth multi store navigation. Deployment will be done with Docker, Nginx, and VPS setup for stability and easy scaling. I will also include logging, monitoring, and admin tools for full system control. Thank you for reading my proposal to the end, and I sincerely hope to work on this project with you, Best, Peter
$200 USD in 3 days
2.0
2.0

Hi, ?15+ Yrs Sr Developer here? I can help add a proper OAuth 2.0 Client Credentials flow to your existing OpenEMR REST API without changing the working parts of the system. I’ve worked with secure API authentication, access tokens, cURL testing, and machine-to-machine integrations before. My first step would be to review the current API structure, then add token issuing, token validation, client credentials handling, and clear error responses for failed requests. I’ll also test the flow end-to-end so trusted clients can request tokens and use them safely on protected endpoints. The final setup will be documented with sample cURL requests so it is easy to use and maintain. Quick question: is your current API built directly inside OpenEMR, or is it a separate wrapper service? If you think I am a good fit, feel free to ping me anytime. — GAZMIR
$100 USD in 7 days
2.1
2.1

Hi, I will implement OAuth 2.0 with the Client Credentials grant to enhance your REST API's authentication layer. This will ensure that each request is securely verified using access tokens for machine-to-machine communication, significantly improving your API's security. With extensive experience in integrating OAuth 2.0 in similar environments, I understand the intricacies of token management and client authentication. My approach will include a robust token issuance process and thorough integration with your existing API structure, ensuring minimal disruption and maximum security. I would like to confirm your preferred method for managing client credentials and if you have any specific requirements for token expiration or scopes. This will help tailor the solution precisely to your needs. Let’s secure your API effectively. Thank you.
$156 USD in 7 days
2.0
2.0

Hello, I am available to start working with you immediately. I have rich experience with OpenEMR development and API customization, especially in modifying existing REST/FHIR APIs, extending endpoints, and improving authentication, data flow, and performance within OpenEMR systems. I understand that OpenEMR APIs are modular and rely on core files, REST controllers, and authentication layers, so modifying an existing API requires careful handling of routing, permissions, and database interactions to avoid breaking the system. I have experience working directly with these components, including extending endpoints, adjusting authorization logic, and ensuring secure, production-ready API behavior. What specific changes are needed in the API (new endpoints, modifying existing responses, or authentication changes)? Are you working with the standard OpenEMR REST API, FHIR API, or a custom-built API layer? Thank you,
$100 USD in 3 days
1.8
1.8

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