Application Programming Interface (API) | NFON [Contact](# "Contact") ![](/web-assets/f/290788/40x40/d98615a3ea/nfon-sales-contact.svg) Sales & General * [Talk to Sales](tel:+498000636624) * [Write to us](/en/request-information) Search * [![Products](https://a.storyblok.com/f/290788/40x40/539cd331b9/nfon-products.svg) Products](#) Call & Work ![AI icon](/assets/ai_icon.webp) + [Cloud Telephony](/en/products/cloud-telephony/) + [SIP Trunk](/en/products/enablement/) + [Devices](/en/products/devices) Build & Automate ![AI icon](/assets/ai_icon.webp) + [Assistants](/en/products/ai/assistants) + [Bots](/en/products/ai/bots) + [AI Agent Studio](/en/products/ai/agent-studio) Engage & Support ![AI icon](/assets/ai_icon.webp) + [Contact Center](/en/products/customer-contact/) Integrations & Add ons + [Integrations & Add ons](/en/integrations/) * [![Solutions](https://a.storyblok.com/f/290788/40x40/da156cbbb8/nfon-solutions-industries.svg) Solutions](#) Industries + [Health & Wellness](/en/solutions/health-wellness) + [Retail & E-Commerce](/en/solutions/retail) + [Finance & Legal](/en/solutions/finance-insurance) + [Travel & Hospitality](/en/solutions/hospitality) + [Public Sector](/en/solutions/public-sector) + [Energy](/en/solutions/energy) Success stories + [Customer Stories](/en/customer-stories/) * [![Partnerships](https://a.storyblok.com/f/290788/36x36/7bd105c67d/nfon-partner.svg) Partnerships](#) Partner with NFON + [Become a partner](/en/partner/become-partner) + [NGAGE](/en/partner/partner-programme) Partner Portal + [Partner Portal](https://partners.nfon.com/) * [![Help Centre](https://a.storyblok.com/f/290788/40x40/d01fbb4f30/help-nfon.svg) Help Centre](/en/help-center) * [Login](https://start.cloudya.com/ "Login") * International + [International](/en/integrations/api) + [Deutschland](/de/integrations/api) + [España](/es) + [France](/fr) + [Italia](/it) + [Österreich](/at) + [Polska](/pl) + [Portugal](/pt) + [United Kingdom](/gb) [![NFON Logo](/assets/logo-nfon.svg)](/en/ "NFON Home") * [Products](#) ![](/web-assets/f/290788/36x36/a9f3ceed6f/nfon-call-work.svg) Call & Work ![AI icon](/assets/ai_icon.webp) Seamless communication ![](/web-assets/f/290788/36x36/d03c61cf40/nfon-build-automate.svg) Build & Automate ![AI icon](/assets/ai_icon.webp) AI Automation ![](/web-assets/f/290788/36x36/106823b73b/nfon-engage-support.svg) Engage & Support ![AI icon](/assets/ai_icon.webp) Omnichannel support ![](/web-assets/f/290788/36x36/50b60f5411/nfon-integrations-add-ons.svg) Integrations & Add ons Connect Teams & CRMs + [![](/images/products-call-work-cloudteleophny-navbar-int_Fjf8b.webp) ### Cloud Telephony ![AI icon](/assets/ai_icon.webp) Seamless cloud telephony for every device. High-fidelity audio with European-grade security.](/en/products/cloud-telephony/) + [![](/images/products-call-work-siptrunk-navbar-int_ZH5NzW.webp) ### SIP Trunk Secure cloud connectivity for your existing hardware. Scales instantly with your business.](/en/products/enablement/) + [![](/images/products-call-work-devices-navbar-int_Z2dP6.webp) ### Devices Professional telephones and hardware designed for clear calls and all-day comfort.](/en/products/devices) + [![](/images/products-build-automate-assistants-navbar-int_2ghUIJ.webp) ### Assistants ![AI icon](/assets/ai_icon.webp) Pre-configured, plug-and-play digital roles like FrontDesk and Workdesk. Ready to deploy instantly with zero coding required.](/en/products/ai/assistants) + [![](/images/products-build-automate-bots-navbar-int_Z1p57Vm.webp) ### Bots ![AI icon](/assets/ai_icon.webp) Prompt-driven, multi-channel conversational experiences. Automate custom customer journeys across Web Chat, Voice, and Livechat.](/en/products/ai/bots) + [![A chatbot creation interface is shown with a readiness message, build report, agent prompt details, and created tools list, over a gradient background.](/images/products-build-agent-studio-navbar-int_Z1Y88dE.webp) ### AI Agent Studio ![AI icon](/assets/ai_icon.webp) Simply turn your ideas into AI agents for your business. Describe the task, create a working agent, then optimize it in one workspace.](/en/products/ai/agent-studio) + [![](/images/products-engage-support-navbar-int_1xyFBE.webp) ### Contact Center ![AI icon](/assets/ai_icon.webp) Omnichannel customer service for modern teams. Manage conversations, automation, AI assistance, and customer context.](/en/products/customer-contact/) + [![](/images/products-integrations-addons-navbar-int_Z1Ka5ea.webp) ### Integrations & Add ons Expand your capabilities and natively connect your everyday business to keep all workflows unified.](/en/integrations/) * [Solutions](#) ![](/web-assets/f/290788/40x40/da156cbbb8/nfon-solutions-industries.svg) Industries Tailored solutions ![](/web-assets/f/290788/40x40/155f2a989d/nfon-success.svg) Success stories 54,000+ trust us + [![](/images/solutions-health-wellness-navbar-int_Z15q3kJ.webp) ### Health & Wellness Secure communication for better patient experiences and care delivery.](/en/solutions/health-wellness) + [![](/images/solutions-retail-ecommerce-navbar-int_zUgjw.webp) ### Retail & E-Commerce Connected communication for modern retail and customer engagement.](/en/solutions/retail) + [![](/images/solutions-finance-legal-navbar-int_1Dy5Ax.webp) ### Finance & Legal Trusted communication for regulated and security-conscious organizations.](/en/solutions/finance-insurance) + [![](/images/solutions-hospitality-travel-navbar-int_17WoBe.webp) ### Travel & Hospitality Seamless communication for exceptional guest experiences and service.](/en/solutions/hospitality) + [![](/images/solutions-publicsector-navbar-int_YyABB.webp) ### Public Sector Reliable communication for responsive public services and citizen support.](/en/solutions/public-sector) + [![](/images/solutions-energy-navbar_FDoix.webp) ### Energy Reliable communication for responsive customer service, even during outages and peak demand.](/en/solutions/energy) + [![](/images/solutions-costumerstroy-navbar-int_Z1MdOsM.webp) ### Customer Stories Real-world impact across every industry. Explore how we solve complex communication challenges for Europe’s leading brands.](/en/customer-stories/) * [Partnerships](#) ![](/web-assets/f/290788/36x36/7bd105c67d/nfon-partner.svg) Partner with NFON Join the NFON network ![](/web-assets/f/290788/36x36/8c5c9a9c78/nfon-partner-portal.svg) Partner Portal Existing partner login + [![](/images/partnerships-partner-navbar-int_ZHYGKx.webp) ### Become a partner From onboarding to co-branded marketing, we provide the tools you need to win.](/en/partner/become-partner) + [![](/images/partnerships-ngage-navbar-int_Zs3yY9.webp) ### NGAGE Discover our tiered rewards system designed to help you scale your business and revenue.](/en/partner/partner-programme) + [![](/images/partnerships-partnerportal-navbar-int_2ki451.webp) ### Partner Portal Access partner tools, deal registration, training resources, and program benefits in one place.](https://partners.nfon.com/) * [Help Centre](/en/help-center) * Search * [Login](https://start.cloudya.com/ "Login") * en + [International](/en/integrations/api) + [Deutschland](/de/integrations/api) + [España](/es) + [France](/fr) + [Italia](/it) + [Österreich](/at) + [Polska](/pl) + [Portugal](/pt) + [United Kingdom](/gb) * [Contact](#) [Contact](# "Contact") + ![](/web-assets/f/290788/40x40/d98615a3ea/nfon-sales-contact.svg) Sales & General Get in touch with us. ![](/images/getstarted-talktosales-navbar-int_ZMspQ4.webp) ### Talk to Sales Get a free consultation to see how NFON products can meet your needs. [+49 8000 – 63 66 24](tel:+498000636624 "+49 8000 – 63 66 24
") ![](/images/getstarted-writetous-navbar-int_ZY7MOf.webp) ### Write to us Fill out our request form. Our experts will respond as soon as possible. [Write to us](/en/request-information "Write to us") # Smart APIs for modern communication. Elevate your applications with NFON’s powerful cloud telephony — seamless integration, cutting-edge performance, and trusted European data protection built in. [Contact us](mailto:integration@nfon.com "Contact us") [All details](/en/integrations/api#a06d170c1d37 "All details") ![A blue puzzle piece with 6 outgoing nodes, symbolizing NFON integrations.](/images/overview-integraations-teams-int_1qhfYR.webp) ![A blue puzzle piece with 6 outgoing nodes, symbolizing NFON integrations.](/images/overview-integraations-teams-int_8mtMn.webp) ## Powerful APIs for every business need. From simple call control to advanced AI-driven automation, our APIs cover the full spectrum of modern business communication. CALL INTEGRATION ### CTI API Seamless communication integration Click-to-call functionality to trigger outgoing calls directly from your software applications. Automatic contact popups to display caller details the moment an incoming call connects. Real-time CRM data linking to sync phone numbers directly with customer records. [Explore CTI API](/en/integrations/cti-api) WORKFLOW AUTOMATION ### Portal API Automation made easy Seamless address book synchronization to import contacts automatically from your CRM or ERP. Smart extension management to automate phone system provisioning and user updates. Intelligent call flow automation to create, adjust, and route queues dynamically. [Explore Portal API](/en/integrations/portal-api) Early Access ### Login with NFON: Access to user call lists Login with NFON provides easy app access without extra credentials and enables access to the NFON Call History API, including user context and call history. To try this feature, contact us with your use case. We cannot accept new partners yet, but you can join our waiting list. [Learn more](/en/integrations/login-with-nfon "Learn more") ![Blue icon of a web page with a user profile symbol, three lines representing text.](/images/partnerships-partnerportal-navbar-int_2ki451.webp) ## Accelerate your integration. Over a thousand companies already rely on our flexible integration solutions. Our goal is to make getting started as easy as possible for you. ### Onboarding We'll guide you through the onboarding process step by step and show you the possibilities our APIs open up. So you can leverage the full potential of our solutions right from the start. ### Development Services NFON AG connects you with specialized service providers who have in-depth experience with the NFON API and can therefore implement customized solutions in a shorter time. Success stories ## Hear directly from our partners. > The NFON API impressed us with its clear structure and high reliability. We are able to efficiently implement our ideas and automate processes that were previously very time-consuming. This led to the creation of our own tool, Portalblitz, which simplifies the management of extensions, groups, queues, and time schedules. ![](/web-assets/f/290788/442x232/1541137881/froschhaeuser_gmbh.png) Thomas Winkler Froschhäuser GmbH > Thanks to the NFON CTI API, we were able to seamlessly connect our PowerWeiss software with NFON Cloud Telephony in a very short time. The simple integration enabled us to quickly offer our customers real added value. ![](/web-assets/f/290788/314x293/733a267f71/weiss_gmbh.jpg) Martin Lauble Weiss GmbH > For us, connecting the NFON APIs to our CRM system SYNCCESS worked without any problems. ![](/web-assets/f/290788/1019x889/5f42882c38/ziel_logo.png) Andreas Döbrich Z.I.E.L. GmbH ## All the details about the NFON APIs ![](/images/integrations-apioverview-imagetext-home-en_ZgU6MT.webp) With the NFON APIs, you can integrate key NFON services directly into your own applications, portals, and business processes. This allows you to develop tailored solutions for your company and your customers, automate workflows, and seamlessly connect third-party systems with the NFON platform. For a quick introduction, the **NFON** **[API Showcase](https://github.com/NFON-AG/API-Showcase)** provides a practical overview of how the APIs can be used. The available source code can serve as a basis for your own integrations and can be adapted and further developed to suit your requirements. Three APIs are currently available and are continuously being developed and expanded with additional functionality: ### 1. Portal API The **[Portal API](/en/integrations/portal-api)** makes key functions of the NFON Admin Portal available via an API. Depending on the use case, access is provided at **K-account or S-account level**. **K-account level – tailored customer solutions** Access to an individual K-account is suitable for applications developed specifically for a customer environment. One possible use case is synchronising the NFON address book with third-party systems such as Microsoft Outlook or Salesforce. **S-account level – centralised partner solutions** At S-account level, NFON partners can centrally manage their customers’ K-accounts. This makes it possible, for example, to automatically apply standardised settings across multiple customer environments or create custom administration processes that go beyond the capabilities of the Admin Portal. ### 2. Call History API The **[Call History API](/en/integrations/login-with-nfon)** provides access to call data for an individual user. Authentication is handled via **“Login with NFON”**, which is integrated into the respective third-party application. After a successful login, the application receives an access token and can retrieve the call data that the user has authorised for access. This makes it possible, for example, to automatically store and further process call summaries in systems such as DATEV or Salesforce. ### 3. CTI API The **[CTI API](/en/integrations/cti-api)** enables the control and analysis of key telephony functions across the entire phone system or K-account. This allows partners, among other things, to: * develop real-time dashboards for incoming and outgoing calls, * display incoming calls together with contact details in CRM systems, * initiate calls directly from a third-party application, * automatically document and store telephony activities. The CTI API therefore provides the foundation for comprehensive telephony integrations with CRM, ERP, and other business applications. ## Frequently asked questions (FAQ) #### Are there any costs associated with the API? No, using the API is free of charge. #### How can I stay up to date for any API news? Please subscribe to "API Breaking Changes" on the **[NFON Status](https://status.nfon.com/)** page for updates. #### Who can I contact if I have questions about the possibilities of NFON APIs? You are welcome to contact **[integration@nfon.com](mailto:integration@nfon.com)** with your request. ![NFON Logo](/assets/logo-nfon.svg) News * [Events](https://www.nfon.com/en/news/events) * [Press](https://corporate.nfon.com/en/communication/) Customers * [Cloudya Login](https://start.cloudya.com/auth/login) * [Admin Portal](https://admin.nfon.com/) * [NFON Status](https://status.nfon.com/) About NFON * [Corporate](https://corporate.nfon.com/en/) * [Investor Relations](https://corporate.nfon.com/en/investor-relations/ir-at-a-glance/) * [Sustainability & ESG](https://corporate.nfon.com/en/sustainability/) * [Career](https://corporate.nfon.com/en/careers/) Legal * [GTC-SLA](/en/legal/gtc-sla) * [Legal Notice](/en/legal/legal-notice) * [Trust Center](https://www.nfon.com/en/trust-center/) * [Data Protection](/en/legal/data-protection) * [Cookie Settings](javascript:onclick=UC_UI.showSecondLayer()) © 2026 - NFON | All rights reserved.