RESTful API stands for Representational State Transfer Application Programming Interface, a term coined by Roy Fielding in 2000. A RESTful API allows an application to communicate with other applications. It is based on the structure of a website, where the data and information are stored in the form of resources. RESTful APIs make use of these resources to provide a certain level of accessibility and data exchange between different systems. This makes web development more efficient, as resources can be accessed easily and quickly.

A RESTful API Developer is responsible for designing and developing APIs to facilitate communication between different applications. The Developer will use their existing skills in web development to create APIs that are secure and reliable, that can provide clients with the ability to access resources for different types of usage. The Developer will also ensure that the APIs are well documented so that any updates or changes to their backend programming environment don't cause any disruptions with existing communication workflows.

Here's some projects that our expert RESTful API Developer made real:

  • Creating browser extensions using Microsoft Graph API
  • Building webpages for flight searches & results
  • Developing applications for React Native in PHP
  • Retrieving data through various APIs, presenting it in a table format & sending email notifications
  • Developing & integrating simple authentication functions into Laravel apps
  • Integrating WordPress REST APIs into mobile apps via PHP
  • Building middleware systems to convert HTTP GET requests into REST calls
  • Developing programs in C# .NET using the WordPressPCL Package Library
  • Developing cloud services programs using Cloud Flare's API
  • Creating tools to trigger Customer orders with CSV file uploads

At Freelancer.com, our RESTful API Developers are highly experienced professionals dedicated to delivering innovative solutions that meet our clients' specific needs! Our Developers have successfully completed various projects for a wide range of clients, enabling quick and secure data exchange between applications. If you’re looking for an experienced developer to create an efficient, reliable and secure API system, then post your project now and hire the most suitable API developer here on Freelancer.com!

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    AWS developer 6 ngày left
    ĐÃ XÁC THỰC

    We are looking for an experienced AWS programmer.

    $1 - $5 / hr
    $1 - $5 / hr
    0 lượt đặt giá
    BigCommerce extension App Development -- 3 6 ngày left
    ĐÃ XÁC THỰC

    Need to develop BigCommerce extension App to connect to JSON web service API. The extension is to incorporate automated sales tax solution to calculate taxes from within BigCommerce application. We have client who wants to calculate taxes on invoices in BigCommerce, we found web service and now we trying to develop an extension that connects to the web service. Experience in developing BigCommerce apps is a must. Send message if interested.

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    Need a Restful API expert 5 ngày left
    ĐÃ XÁC THỰC

    I am in need of a skilled Restful API expert who can build a PHP API with a specific API framework in mind. The primary function of the API will be data scrapped. We have about 50 API scripts which needs to be updated regarding the URL has changed or the websites layout has changed. We are scrapping data from other websites every day through cronjobs. Ideal Skills and Experience: - Proficient in PHP programming language - Experience in building Restful APIs - Knowledge of API frameworks - Strong understanding of data retrieval techniques and best practices

    $7 / hr (Avg Bid)
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    I am looking for a Python developer to integrate a REST API into my project. The main purpose of this integration is authentication and authorization. Skills and Experience: - Strong proficiency in Python and experience with REST API integration - Knowledge of authentication and authorization protocols - Familiarity with external API integration - Ability to work with JSON format for data retrieval and presentation The data that needs to be retrieved is from an external API. The retrieved data should be presented in JSON format. If you have the skills and experience required for this project, please submit your proposal.

    $185 (Avg Bid)
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    Restful Python SDMX API and viewer. 5 ngày left
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    I'm looking for an experienced Python coder to create a SDMX 2.1 Restful API and viewer application using the Python pandasSDMX library. The API will have commands to connect, list the Datasources, categories, datasets and values using a SDMX 2.1 RESTful web service API. Each SDMX web service provides a subset of the full SDMX feature set, so the same request made to two different sources may yield different results, or an error message. Errors need to be handled as described on () and any error messages clearly displayed. I need a viewer application showcase theAPI. It can connect to datasources an allow me to navigate through its tree and metadata to view any timeseries data. There is an EasyUI demo that looks perfect for this as it has a tree and 2 other tabs - all in...

    $11 / hr (Avg Bid)
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    Reverse Engineer T i Kt ok mobile API 5 ngày left
    ĐÃ XÁC THỰC

    ? Job Opportunity: Reverse Engineer Expert Needed! ? Project Overview: We are looking for a savvy and experienced Reverse Engineer to conduct an analysis and create a comprehensive documentation of a particular mobile API. ? Job Responsibilities: Analyze and understand the API endpoints, requests, responses, and authentication mechanisms. Provide comprehensive documentation about the API’s endpoints, functionalities, and behaviors. Create a Swagger/OpenAPI documentation, offering a clear and detailed guide to interacting with the API. ? Key Qualifications: Proven experience in reverse engineering and analyzing mobile APIs. Proficiency in using reverse engineering tools and methodologies. Deep understanding of API technologies and protocols (REST, HTTP/HTTPS, OAuth, etc.) Famil...

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    React Expert With Perfect Styles 4 ngày left
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    I am looking for a React expert with perfect styles to work on my project. The ideal candidate should have experience in developing responsive designs and integrating APIs. Specific requirements for the project include: Creating a responsive design that adapts to different screen sizes from Figma designs Integrating the existing APIs from existing sources. The project needs to be completed within a timeframe of 1-2 weeks. I have existing design assets available, so the freelancer will not need to create them from scratch. If you have the necessary skills and experience, please reach out to me. Detailed doc. Cost: max is $400 (Please don't place a bid if you want more cost) Timeline: max is 2 weeks. I want to hire one who can work faster with lower cost.

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    api to a database 4 ngày left
    ĐÃ XÁC THỰC

    I want to use the API () to get client invoice and payment data into a Google spreadsheet. The Service Fusion API does not have a search function, so I believe we need to GET the data from database and put/store it in AirTable, ClickUp or an external database to find the data more easily and then sort through the data to find all client invoices and payments. This is an example Google spreadsheet This spreadsheet does the math to find the total due between an invoice amount and the payments collected. If you think you have the necessary skills to help me with this task, please get in touch. I'm looking forward to hearing from you!

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    I am looking for a freelance developer to create a web application that will serve as an SMS Gateway and also support WhatsApp. The primary function of the application should be both sending and receiving messages on both platforms. Additionally, I require system integration with other systems. Ideal skills and experience for this project include: - Strong knowledge and experience in web development - Proficiency in programming languages such as C#, JavaScript, and HTML - Experience with SMS Gateway and Whatsapp API integration - Familiarity with system integration and API development - Ability to ensure the application is secure and scalable for multiple clients If you have the necessary skills and experience, please submit your proposal along with relevant examples of your previous w...

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    Hello, I'm looking for a freelancer to help me with developing an Odoo module for integration with online stores. Specifically, I am looking to integrate my online stores with Odoo. I have a specific online store platform in mind, and the primary purpose of the Odoo module is for inventory and order management through cron and webhooks. I'm looking for someone who is knowledgeable and can develop the module quickly.

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    Anyone available to support Java project (Senior full stack developer)? Needs to be in EST, should be 100% online for 8 hours. I will just login to laptop 8:00 am EST after that you will be responsible to stay online and complete the work.

    $16 / hr (Avg Bid)
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    Anyone available to support Java project (Senior full stack developer)? Needs to be in EST, should be 100% online for 8 hours. I will just login to laptop 8:00 am EST after that you will be responsible to stay online and complete the work.

    $522 (Avg Bid)
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    Acellemail bulk Add Subscriber via api ASAP 1 ngày left
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    Need to fix this part or add a function. When I send one user's data the API works { "EMAIL": "", "FIRST_NAME": "Subscriber1 Fname", "LAST_NAME": "Subscriber1 Lname" } [ { "EMAIL": "", "FIRST_NAME": "Subscriber1 Fname", "LAST_NAME": "Subscriber1 Lname" }, { "EMAIL": "", "FIRST_NAME": "Subscriber2 Fname", "LAST_NAME": "Subscriber2 Lname" } ] But when I send several I get a response 403 { "EMAIL": [ "The Email is required" ] }

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    MLS MRED API Integration into our website 1 ngày left
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    I am looking for a developer to integrate the MLS MRED API into our website. The purpose of this integration is to display both residential and commercial real estate listings. In addition to displaying listings, we require the implementation of advanced search filters to enhance user experience. Ideal skills and experience for this job include: - Strong knowledge of MLS MRED API - Experience in integrating APIs into websites - Proficiency in implementing advanced search filters If you have prior experience in integrating MLS MRED API and can provide examples of websites you have worked on with similar functionality, please include them in your proposal.

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    **Skills and Qualifications:** We are looking for candidates with the following qualifications: * Proficiency in Node.js and TypeScript for server-side development. * Prior experience with Firebase Cloud Functions (Google Cloud Functions). * Strong familiarity with NoSQL databases like Firebase Cloud Firestore. * Experience in working with APIs for data retrieval and manipulation. **Project Overview:** The primary objective of this project is to create a system that automates the following tasks using Firebase Cloud Functions: * **Data Retrieval**: Your role will involve retrieving data from an external API. This data will include information about football matches (dates, times, clubs, etc.), details about football players, and player performance statistics. The tasks within this pro...

    $1306 (Avg Bid)
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    We are looking for a developer who can develop with Cognitive search in SharePoint Online. Pull data from SharePoint online, pass info to Open AI, for cognitive search w/ ChatGPT API or Microsoft Open AI service. You must have direct experience with passing information into Open AI or ChatGPT via APIs. So we know you actually read this bid and did not autopost please put the words "AI will rule the world !" at the beginning of your bid. We must be able to see you have recent and strong experience in your job history with programming with Chat GPT or OpenAI.

    $2260 (Avg Bid)
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    Esp32 POS help with self certification -- 2 15 giờ left
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    I need help with the self certification process on mobilepay. We passed the certification process with the same esp32 program we got now, in the past only change is the credentials for a new client. But there is something in the process im missing or have forgotten, so need an extra set of eyes to help find a solution for this, and read through the documentation and do the test. It has been working with this code before, it has to work again. Here is the link to the documentation: The code is made in Arduino IDE so expect you got experience in this. Im expecting its less than 1 hour job for the right person.

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    Esp32 POS help with self certification 14 giờ left
    ĐÃ XÁC THỰC

    I need help with the self certification process on mobilepay. We passed the certification process with the same esp32 program we got now, in the past only change is the credentials for a new client. But there is something in the process im missing or have forgotten, so need an extra set of eyes to help find a solution for this, and read through the documentation and do the test. This is a no cure no pay kind of thing, since it has been working with this code before, it has to work again. Here is the link to the documentation: The code is made in Arduino IDE so expect you got experience in this.

    $46 (Avg Bid)
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    I am looking for a developer with experience working with APIs to connect our vacation rental system (which is made in Laravel) to using the API. The ideal candidate will have the following skills and experience: - Experience working with APIs, specifically the API. - Ability to complete the integration within a 3-4 week timeline. - Knowledge and understanding of integrating availability and rates, content, photo and get reservation functionality. If you meet these requirements and have the necessary skills and experience, please submit your proposal.

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    PAX A35 Terminal Semi-Integration 6 giờ left
    ĐÃ XÁC THỰC

    I need a semi-integration solution using POSLink, which will allow for quick and secure payments to be processed. All transactions must be PCI compliant and the system should be capable of handling swipe, chip, and contactless payments. I’m looking for a freelancer with extensive experience in payment processing to ensure the highest level of security and smooth operations for my customers. If you have experience setting up complex systems with similar payment processing requirements, I’d like to hear from you. Developer must be have a PAX A35 debug terminal.

    $4250 (Avg Bid)
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    We are looking for an expert who can define an openAPI definition for the openSource variant of vtiger 7.4.0/7.5.0 The openAPI definition shll be used for generating API clients from the definition. E.g. we will use maven openapi-generator-maven-plugin 7.0.0 We require an expert on vtiger API along an even better expert on openAPI definition creation. Postman collection is available:

    $64 (Avg Bid)
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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to re-implement this api in java / spring-boot Mandatory!!!! You have to have a installed the docker environment on you PC/Laptop and You document EACH step step to make the up and running along with a docker compose environment to make the new spring-boot api running with it. Milestones MS1: suggest if an openAPI definition would reduce your workload, since REST server and client can be generated MS2: reImplement as spring boot service the endpoints documented here: and: MS3: provide a docker compose incl. all steps to make your code available in a container Implementations: - best practices with openAPI - best practices with spring boot NO UI for now required! NO database required! No REST en...

    $120 (Avg Bid)
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    We look for Java Spring-Boog and Core-Java senior expert developer for vtiger integration Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a installed vtiger on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Implement a REST api call to - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserDTO> pUsersToAdd) - update update users List<UserDTO> updateUsers(List<User...

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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API maybe helpful: Mandatory!!!! You have to have a installed matrix synapse on PC/Laptop and on your smartphone to run on your local environment. You document EACH step you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Implement a spring boot service to invite users to the matrix. - sendNewUserRegistrations(List<UserDTO>) send a template e-mail to users to invite them to register an account - createNewPrivateGroupChats(List<GroupChatDto>, SpaceDto) create the list of (private) group chats into the given Space - inviteNewUsers(List<UserDTO>, List<GroupChatDto...

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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API (cora-api) and Mandatory!!!! You have to have a installed opnSense on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Delivery of to reproduce your steps of the proxmox installation on virtualBox Implement a REST api call to CRUD users and groups - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserD...

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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API (cora-api) Mandatory!!!! You have to have a installed opnSense on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Delivery of to reproduce your steps of the opnSense installation on virtualBox Implement a REST api call to List<VoucherDTO> listAllVouchers() List<VoucherGroupDTO> listAllVoucherGroups() List<VoucherProviderDTO> listAllVoucherProviders() List<VoucherDTO> expireVouchers(List<VoucherDTO>) List<VoucherDTO> createVouchers(List<VoucherDTO>) same for temp...

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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a playground of mailcontrol / forcepoint cloud security gateway in access. Preferably as playground on a docker environment. (plz check this as part of your bid!) You document EACH step to reproduce a test/integration environment Milestones MS1: Implement a spring boot service to add new users to the e-mail subscription. - fetchEmailSubscriptionsAll() - fetchEmailSubscriptions(List<UserDto> pByExample) - addNewEmailSubscriptions(List<UserDto>) // UserDto contains a main e-mail => subscription e-mail and alias e-mail addresses, along with a details of add subscription screenshot - deleteEmailS...

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    you are a fresher here? Require a quick win for gaining reputation here? this is a easy task, IF you are docker and java/springboot developer We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API maybe helpful: Mandatory!!!! You have to have a installed matrix synapse on PC/Laptop and on your smartphone to run on your local environment. You document EACH step you can run locally via: Milestones MS1: Implement a spring boot service to invite users to the matrix. - sendNewUserRegistrations(List<UserDTO>) send a template e-mail to users to invite them to register an account - createNewPrivateGroupChats(List<GroupChatDto>, SpaceDto) create the list of (private) group chat...

    $182 (Avg Bid)
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    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a installed gitlab CE on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: Implement a rest api call to - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserDTO> pUsersToAdd) - update update users List<UserDTO> updateUsers(List<UserDTO> pUsersToUpdate) - block/ban users List<UserDTO> blockUsers(List&l...

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