Your one-stop shop for easy, programmable SMS/MMS messaging
Easily send and receive messages at scale, verify users with 2FA, deliver alerts and marketing campaigns, and engage customers in two-way conversations with FreeClimb Messaging API, backed by proven code and a powerful, carrier-grade platform.
Send your first SMS/MMS message in minutes with expert documentation, SDK libraries, sample code, and tutorials.
Know exactly when your messages are delivered and easily debug your apps with detailed logs.
Deploy messaging campaigns faster with our 10DLC concierge support.
Businesses choose the FreeClimb API platform for its reliability, support, and cost-effectiveness
Integrate scalable messaging into your applications in minutes. From high deliverability to transparent reporting, our platform is designed to cover all the details, so that you can focus on offering rich and meaningful experiences.
Long message concatenation
When an SMS/MMS message exceeds the character limit for a single text, our API automatically segments long messages and pieces them together upon delivery, ensuring the recipient sees a single cohesive message.
Message queueing
The API queues incoming messages to ensure they are efficiently processed in order and prevent system overload. Each message is assigned a unique ID and timestamp for easy tracking throughout its lifecycle.
Message logs and reporting
Receive instant updates on message delivery, status changes, and errors via advanced webhook logging, giving you the visibility you need to troubleshoot, debug, and reduce costs.
Automatic message encoding
FreeClimb automatically detects and translates Unicode characters into GSM7 characters, minimizing cost per send and maintaining compatibility with a wide range of devices and networks.
Opt-in and opt-out support
FreeClimb applications can programmatically respond to opt-in, opt-out, or "help" keywords, updating subscription lists and ensuring compliance with regulations.
Use any sender type
Easily buy, manage, or port local (10DLC), toll-free, and short-code numbers, or use numbers you already own.
An API platform built for scale, speed, and performance
Best-in-class platform reliability
For decades, FreeClimb has maintained a 99.999% uptime through direct Tier 1 interconnects and a fault-tolerant software architecture, ensuring optimal call quality, message deliverability, and service availability.
Ironclad security and compliance
FreeClimb is certified to the most rigorous compliance standards, including HIPAA and Level 1 PCI DSS, enabling businesses to scale into new markets with ease.
Safeguard data with encryption
All API communications are secured using HTTPS, encrypting data in transit. Add an extra layer of security to your applications using webhook-based request signatures to verify authenticity.
Send one-way texts, or allow customers to reply to you and get real-time assistance, enabling a more personal, conversational interaction that builds trust.
Fortify your security measures by implementing two-factor authentication and sending one-time passwords (OTPs) or verification codes, preventing unauthorized access and reducing the load off your support team.
Enrich your communications with visually compelling content, including links, images, gifs, and videos.
Use and process any characters across different languages, such as accents, symbols, and emojis.
Drive higher engagement using a recognizable phone number or branded sender ID, improving the customer experience.
Collect valuable customer feedback with customizable surveys, deepening your understanding of their needs and making them feel heard.
All the use cases you need to scale your communications and drive engagement
Quickly build impactful experiences, deliver time-sensitive information, validate users, and more with just a few lines of code.
Send text messages hassle-free with white-glove support
Evolving requirements for A2P 10DLC messaging can be overwhelming to navigate alone. With deep expertise in SMS/MMS verification, we offer white-glove support to streamline the registration process and ensure your messaging campaigns are compliant and deployed faster.
Configuring your brand with The Campaign Registry
Submitting your brand for brand vetting
Securing your Brand ID and Identity Status
Monitoring your approval status
Linking your Brand ID to your FreeClimb account
Accelerate build time with dev-friendly resources
Support for Multiple Languages: Code in your preferred language, including Java, Python, C#, Node.js, PHP, and Ruby.
Real-Time Monitoring: Use webhook logging to monitor and manage call statuses, history, and logs.
Dedicated Integration Support: Get direct-to-engineer support when you need it most.
Save on every message
Customers typically save 30-40% per message segment by switching to FreeClimb. Pay for only what you use with transparent, pay-as-you-go pricing. Get additional discounts as you scale.
Domestic Long-code (10DLC) SMS
Domestic Long-code (10DLC) MMS
Registered Toll-Free
Enrich your customer communications with programmable messaging
Take advantage of a robust platform and build more impactful interactions with all the tools and support you need. Whether you’re a developer, business owner, or marketer, we’ll have you sending your first message in no time.
Resources
While 10DLC enables businesses to send a high volume of messages at scale, a multi-step sign-up process is required, from Brand and Campaign registration to throughput vetting.
A2P 10DLC messaging helps you reach an audience with meaningful and timely messages on the device they use the most. However, 10DLC also requires a special registration process that affects your message deliverability and brand credibility. We made it easier to get set up.
From marketing campaigns to order confirmations, A2P SMS messaging equips businesses with the power of direct and personalized customer outreach. Find which number best supports your use case, their associated costs, and how FreeClimb can help you scale your campaigns.
FreeClimb Messaging API FAQs
FreeClimb Messaging API is a programmable SMS and MMS solution that enables businesses and developers to send, receive, and manage messages directly through their applications. Built on a carrier-grade communications platform with decades of engineering expertise, FreeClimb provides reliable messaging infrastructure, developer tools, compliance support, and enterprise-grade security.
FreeClimb Messaging API supports a wide range of messaging applications, including two-factor authentication, appointment reminders, alerts, notifications, marketing campaigns, customer support conversations, surveys, order updates, and automated business communications. Businesses can send SMS and MMS messages, support two-way conversations, and manage sender options such as local numbers, toll-free numbers, and short codes.
FreeClimb Messaging API is designed for fast implementation with developer resources including documentation, SDKs, quickstarts, sample code, and flexible APIs. Developers can integrate messaging capabilities into existing applications and workflows using popular programming languages such as Java, Python, C#, Node.js, PHP, and Ruby.
FreeClimb provides reliable messaging infrastructure with monitoring tools, delivery reporting, webhook notifications, and detailed message logs. Developers can track message status, troubleshoot issues, optimize performance, and improve deliverability across messaging workflows.
Yes. FreeClimb supports A2P 10DLC messaging requirements and provides guided assistance with registration, brand approval, campaign setup, and compliance processes. The platform also supports opt-in, opt-out, and help keyword management to help businesses maintain compliant messaging programs.
Yes. FreeClimb Messaging API is built on enterprise-grade infrastructure designed for scalable communication workloads. The platform uses secure HTTPS communications, webhook request signatures, and security features designed to support requirements such as HIPAA, Level 1 PCI DSS, and SOC 1 and 2 certification.
FreeClimb uses transparent, usage-based pricing, allowing businesses to pay for the messages they send and receive without long-term contracts or hidden fees. Volume-based pricing options are available as messaging needs grow.
FreeClimb combines reliable messaging infrastructure, developer-friendly APIs, compliance support, and expert technical assistance. Businesses choose FreeClimb to build scalable messaging experiences while benefiting from decades of telecom expertise and enterprise-grade reliability.
Developers can start by creating a free trial account, exploring documentation, and testing messaging applications with available resources. Businesses can also work with FreeClimb experts to design and scale messaging solutions tailored to their needs.