Best AI Agent Builders for Model Context Protocol (MCP)

Retool is a modern AI-native application development platform designed to help teams build internal software quickly and efficiently. It enables users to create agents, workflows, dashboards, and full-stack apps using natural language prompts and visual tools. Retool connects directly to databases, APIs, vector stores, and AI models to ensure applications work seamlessly with existing systems. The platform allows teams to transform raw data into actionable tools such as dashboards, admin panels, and monitoring systems. With drag-and-drop UI building, code-level customization, and AI-assisted generation, Retool supports multiple development styles. Built-in workflows automate complex processes while maintaining auditability and security. Retool fits naturally into standard engineering stacks with support for CI/CD and version control. Enterprise-grade permissions and hosting options ensure sensitive data stays protected. Used by thousands of companies worldwide, Retool helps teams ship AI-powered software faster. It bridges the gap between idea and production with speed and control.

Postman serves as a collaborative platform for developing APIs, designed to simplify the entire process of API creation and enhance teamwork, enabling the rapid development of superior APIs. The platform's features facilitate each phase of API construction, making it easier to collaborate and accelerate the creation of high-quality APIs. Users can quickly and effortlessly send requests for REST, SOAP, and GraphQL directly within Postman, optimizing their workflow. Additionally, it allows for the automation of manual tests, seamlessly integrating them into your CI/CD pipeline to safeguard against potential issues when code changes are deployed to production. API behavior can be communicated effectively by simulating endpoints and their respective responses without the need for a backend server setup. You can also generate and publish visually appealing, machine-readable documentation, which helps in making your API more accessible for users. Regular performance and response time checks ensure you stay informed about your API's health, allowing for proactive management. Lastly, Postman fosters a shared environment for API creation and consumption, enabling real-time collaboration among team members. Postman’s AI Agent Builder revolutionizes the development of AI agents with its no-code platform, enabling users to build, test, and deploy powerful agents without coding expertise. It provides access to a vast library of over 100,000 APIs and a variety of LLMs, offering tools to compare their performance, cost, and response quality. The visual workflow builder simplifies creating multi-step agent interactions, and its testing tools ensure reliability before deployment.

The most versatile and realistic AI speech software ever. Eleven delivers the most convincing, rich and authentic voices to creators and publishers looking for the ultimate tools for storytelling. The most versatile and versatile AI speech tool available allows you to produce high-quality spoken audio in any style and voice. Our deep learning model can detect human intonation and inflections and adjust delivery based upon context. Our AI model is designed to understand the logic and emotions behind words. Instead of generating sentences one-by-1, the AI model is always aware of how each utterance links to preceding or succeeding text. This zoomed-out perspective allows it a more convincing and purposeful way to intone longer fragments. Finally, you can do it with any voice you like.

Microsoft Foundry provides a unified environment for building AI-powered applications and agents that reflect your organization’s knowledge, workflows, and security standards. Developers can tap into more than 11,000 cutting-edge models, instantly benchmark them, and route intelligently for real-time performance gains. The platform simplifies development with a consistent API, prebuilt SDKs, and solution templates that accelerate integration with existing systems. Foundry also incorporates enterprise-grade governance, providing centralized monitoring, compliance controls, and secure model operations across all teams. Organizations can embed AI directly into tools they already use — such as GitHub, Visual Studio, and Fabric — to streamline development. Its interoperability with cloud infrastructure and business data ensures every model is grounded, accurate, and production-ready. From automating internal workflows to powering transformative customer experiences, Foundry enables high-impact AI at scale. By combining model breadth, developer velocity, and enterprise security, Microsoft Foundry delivers an unmatched foundation for modern AI innovation.

Metaflow serves as an intuitive agent creator and automation framework for growth operators and knowledge professionals who find themselves constrained by inflexible app connections and a plethora of prompt threads. This platform allows for uninhibited ideation while transforming insights into scalable AI workflows seamlessly. In contrast to conventional automation solutions that compartmentalize creativity from implementation, Metaflow integrates both discovery and execution into a cohesive environment. This integration facilitates exploration, development, and maturation of ideas into robust systems that generate significant impact. As a result, growth teams can liberate their cognitive resources, enabling them to engage in work that is profoundly fulfilling and impactful. Ultimately, Metaflow empowers users to harness their creativity while also streamlining their operational processes.

Runbear empowers teams to rapidly build AI-powered agents without any coding, seamlessly integrating them into widely used communication platforms such as Slack, Teams, Discord, and HubSpot. The platform enables users to deploy specialized AI assistants connected to models like OpenAI, Claude, and Gemini, enhanced by integrations with knowledge sources including Google Drive, Notion, and Confluence to keep content updated automatically. Runbear’s flexible multi-agent management lets organizations customize AI experiences for different teams, improving productivity and collaboration across departments. Key features include automating meeting prep, generating PRDs from Slack threads, querying databases with natural language, and triggering workflow automation through Zapier—all directly from chat environments. The product is designed to simplify complex workflows by reducing repetitive tasks and providing instant, context-aware AI responses to common questions. Companies across various industries praise Runbear for its intuitive interface, seamless setup, and transformative impact on team communication and efficiency. Additionally, Runbear supports compliance with enterprise-grade security standards such as SOC2. This makes it a reliable choice for businesses looking to incorporate AI assistants while maintaining data integrity and privacy.

Mastra is an open-source TypeScript framework that allows developers to build AI agents capable of performing tasks, managing knowledge, and retaining memory across interactions. With a clean and intuitive API, Mastra simplifies the creation of complex agent workflows, enabling real-time task execution and seamless integration with machine learning models like GPT-4. The framework supports task orchestration, agent memory, and knowledge management, making it ideal for applications in automation, personalized services, and complex systems.

Activepieces is an intuitive, open-source automation platform that enables teams to build powerful AI-driven workflows without any coding. With 280+ pre-built automation pieces (MCPs), users can easily integrate various applications, streamline repetitive tasks, and automate business processes. The platform offers no-code tools for creating chat interfaces, automating approvals, and generating AI-powered agents. Whether for small businesses or large corporations, Activepieces supports decentralized innovation and seamless collaboration, empowering teams to automate daily operations, improve productivity, and unlock the full potential of AI in their workflows.

Portia AI is an open-source developer framework that includes optional cloud services, enabling teams to quickly create, deploy, and oversee stateful, authenticated AI agents while maintaining full visibility and control over the process. Developers initiate the process by using the SDK to generate clear, organized multi-step "plans" that integrate LLM reasoning with various tool calls, executing these plans incrementally and enhancing the plan state at each step, while also allowing for pauses to seek clarifications, whether from human users or machine inputs, when authentication or additional information is necessary. With its cohesive authentication framework and an easily customizable tool catalog, Portia automatically manages the credentials and permissions needed for remote API and MCP tool calls. Furthermore, the accompanying cloud solution provides persistent storage for plan execution states, historical log tracking, telemetry dashboards, and managed scaling, ensuring that production deployments remain dependable, traceable, and compliant with regulatory standards. This comprehensive approach not only simplifies the development process but also enhances the overall efficiency and effectiveness of AI agent deployments.

Koog is a Kotlin-based framework designed for developing and executing AI agents using idiomatic Kotlin, catering to both simple agents that handle individual inputs and more intricate workflow agents with tailored strategies and configurations. Its architecture is built entirely in Kotlin, ensuring a smooth integration of the Model Control Protocol (MCP) for improved management of models. The framework also utilizes vector embeddings to facilitate semantic search and offers a versatile system for creating and enhancing tools that can interact with external systems and APIs. Components that are ready for immediate use tackle prevalent challenges in AI engineering, while intelligent history compression techniques are employed to optimize token consumption and maintain context. Additionally, a robust streaming API supports real-time response processing and allows for simultaneous tool invocations. Agents benefit from persistent memory, which enables them to retain knowledge across different sessions and among various agents, and detailed tracing facilities enhance the debugging and monitoring process, ensuring developers have the insights needed for effective optimization. This combination of features positions Koog as a comprehensive solution for developers looking to harness the power of AI in their applications.

MCP-Use is an open-source platform designed for developers that provides an array of SDKs, cloud infrastructure, and an intuitive control interface to facilitate the creation, management, and deployment of AI agents utilizing the Model Context Protocol (MCP). The platform allows connections to various MCP servers, each offering distinct tool functionalities such as web browsing, file handling, or specialized third-party integrations, all accessible through a single, unified MCPClient. Developers are empowered to build custom agents (using MCPAgent) that can intelligently choose the most suitable server for each specific task by leveraging configurable pipelines or a built-in server management system. By streamlining processes like authentication, managing access control, audit logging, observability, and creating sandboxed runtime environments, it ensures that both self-hosted and managed MCP developments are primed for production use. Moreover, MCP-Use enhances the development experience by integrating with well-known frameworks such as LangChain (Python) and LangChain.js (TypeScript), significantly speeding up the process of building AI agents equipped with diverse tools. In addition, its user-friendly architecture encourages developers to innovate and experiment with new AI functionalities more efficiently.

CREAO is an advanced AI automation platform that allows users to create intelligent agents through conversational inputs. It enables individuals and teams to automate tasks, workflows, and processes without needing technical expertise. The platform’s Super Agent can execute everything from simple actions to complex multi-step workflows with ease. CREAO is designed to retain memory, allowing agents to learn from past actions and improve over time. Users can convert one-time tasks into reusable agent-based applications for consistent and reliable execution. It also integrates with various tools and systems, enabling seamless workflow automation across platforms. The platform supports scheduled and continuous task execution, allowing AI agents to operate 24/7. CREAO provides built-in and customizable skills to enhance agent capabilities. Its user-friendly interface makes it accessible for both beginners and advanced users. Overall, CREAO empowers users to scale productivity and automate operations through intelligent AI agents.

AgentKit offers an all-in-one collection of tools aimed at simplifying the creation, deployment, and enhancement of AI agents. Central to its offerings is Agent Builder, a visual platform that allows developers to easily create multi-agent workflows using drag-and-drop nodes, implement guardrails, preview executions, and manage different workflow versions. The Connector Registry plays a key role in unifying the oversight of data and tool integrations across various workspaces, ensuring effective governance and access management. Additionally, ChatKit facilitates the seamless integration of interactive chat interfaces, which can be tailored to fit specific branding and user experience requirements, into both web and app settings. To ensure high performance and dependability, AgentKit upgrades its evaluation framework with comprehensive datasets, trace grading, automated optimization of prompts, and compatibility with third-party models. Moreover, it offers reinforcement fine-tuning capabilities, further enhancing the potential of agents and their functionalities. This comprehensive suite makes it easier for developers to create sophisticated AI solutions efficiently.

Kaily is an innovative platform that utilizes AI technology to empower organizations to create and launch no-code, omnichannel conversational agents that surpass traditional chatbots by not only providing answers but also executing tasks independently, such as managing customer support, engaging prospective clients, facilitating sales, resolving problems, scheduling appointments, and streamlining workflows. This platform ensures round-the-clock conversational interactions across various channels, including web widgets, WhatsApp, email, mobile applications, Slack, voice calls, and public web pages, while also allowing integration with real-time business data sources to ensure that agents offer precise and contextually relevant responses and actions. Additionally, Kaily features an agent builder that allows for the customization of AI agents to reflect your brand's voice and emulate the behavior of your top-performing employees. With data connectors, agents can access live databases or CRM systems for the most current information and actions, and no-code AI workflows enable the trigger of tangible outcomes, such as updates to CRM systems or the creation of support tickets, based on conversational inputs, enhancing overall operational efficiency. This comprehensive approach not only improves customer interaction but also streamlines business processes, making Kaily an invaluable tool for modern enterprises.

Kagent is a versatile, open-source framework specifically designed for cloud-native AI agents, allowing teams to construct, deploy, and operate autonomous agents within Kubernetes clusters to streamline complex operational processes, troubleshoot cloud-native infrastructures, and oversee workloads with minimal human oversight. This framework empowers DevOps and platform engineers to develop intelligent agents capable of comprehending natural language, planning strategically, reasoning effectively, and executing a series of actions across Kubernetes environments by utilizing integrated tools and Model Context Protocol (MCP)-compatible integrations for various functions, including metric queries, pod log displays, resource management, and service mesh interactions. Additionally, Kagent facilitates communication between agents to orchestrate intricate workflows and includes observability features that enable teams to track and assess agent performance and behavior. Furthermore, its compatibility with multiple model providers, such as OpenAI and Anthropic, enhances its versatility and adaptability within diverse operational contexts.

Sim serves as an open-source platform that facilitates the creation, testing, and deployment of AI agent workflows through an intuitive visual interface that allows users to drag and drop components, thus streamlining complex automation tasks. By offering a canvas-like workspace akin to traditional design software, it enables individuals to link various modular elements that represent AI agents, APIs, and other integrations, allowing for the development of intricate multi-step workflows without the necessity of extensive coding knowledge. Users can connect to a diverse range of over 100 models and applications, which allows them to incorporate various tools such as email services, databases, customer relationship management systems, and calendars into cohesive, automated workflows capable of executing genuine business operations. In addition, Sim.ai empowers users to create and define agents, track their collaborative processes step by step, and observe outputs in real-time, which simplifies the tasks of debugging, refining, and personalizing workflows. The platform also accommodates a variety of triggers, including APIs, chat interfaces, scheduled tasks, and webhooks, which supports versatile deployment in multiple settings, ensuring that users can adapt their automated solutions to meet varying needs. This flexibility and ease of use make Sim an appealing choice for individuals and businesses aiming to harness the power of AI without the steep learning curve typically associated with automation technologies.

The Claude Agent SDK serves as a comprehensive toolkit for developers aiming to create autonomous AI agents that utilize Claude's capabilities, facilitating their ability to engage in practical tasks that extend beyond mere text generation by directly interfacing with various files, systems, and tools. This SDK incorporates the same core infrastructure utilized by Claude Code, featuring an agent loop, context management, and built-in tool execution, and it is accessible for developers working in both Python and TypeScript. By leveraging this toolkit, developers can create agents that are capable of reading and writing files, executing shell commands, conducting web searches, modifying code, and automating intricate workflows without the need to build these functionalities from the ground up. Additionally, the SDK ensures that agents maintain a persistent context and state throughout their interactions, which allows them to function continuously, reason through complex multi-step problems, take appropriate actions, verify their results, and refine their approach until tasks are successfully completed. This makes the SDK an invaluable resource for those seeking to streamline and enhance the capabilities of AI agents in diverse applications.

ElevenLabs Agents is an innovative platform designed for the creation, deployment, and scaling of smart conversational AI agents that can communicate through speech, text, and actions across various channels, including phone, web, and applications. It empowers developers and teams to craft real-time agents that engage users in a seamless manner, using a combination of speech recognition, advanced language models, and voice synthesis to simulate human-like conversations. The platform facilitates agents in addressing customer inquiries, streamlining workflows, providing answers, and performing tasks by leveraging interconnected data sources and established logic, ensuring that interactions are both precise and contextually relevant. Additionally, these agents can be tailored with knowledge bases, system prompts, and tools that allow them to interact with external systems, execute complex logic, and accomplish tasks beyond mere answers. They feature multimodal capabilities, enabling them to read, speak, and comprehend inputs while adeptly managing the intricacies of conversation. Moreover, this versatility enhances user engagement and satisfaction, making the agents invaluable assets in modern digital interactions.

The Teradata Enterprise AgentStack is a comprehensive platform designed for the development, deployment, and management of enterprise-level autonomous AI agents that seamlessly connect to reliable data and analytics, aiding businesses in transitioning from experimentation phases to fully operational agentic AI with robust enterprise control. This platform consolidates diverse functionalities to facilitate the entire agent lifecycle; AgentBuilder streamlines the process of creating intelligent agents through both no-code and pro-code tools that are compatible with Teradata Vantage and various open-source frameworks. Furthermore, the Enterprise MCP provides secure, context-rich access to well-governed enterprise data along with tailored prompts that enhance agent intelligence. Meanwhile, AgentEngine ensures scalable agent execution while maintaining consistent memory and reliability across various hybrid environments. Additionally, AgentOps plays a crucial role in centralizing the monitoring, governance, compliance, auditability, and policy enforcement, ensuring that the agents operate within established parameters, which ultimately leads to increased efficiency and adherence to organizational standards. Collectively, these features empower organizations to harness the full potential of autonomous AI in a controlled and efficient manner.

OpenLegion serves as an advanced AI agent framework and platform designed to facilitate the creation of an AI workforce tailored to your specifications. By simply instructing OpenLegion with requests like "I want a marketing agency," "I want a sales team," or "I want a research desk," it efficiently sets up an agent stack complete with predefined roles, financial allocations, permissions, and secure credential management. Rather than limiting its capabilities to basic chat functions, OpenLegion is engineered to handle comprehensive workflows; agents are equipped to navigate websites, complete forms, write and execute code, send emails and messages, organize files and folders, conduct research and summarizations, scrape data, qualify potential sales leads, process data in spreadsheets, manage social media posts, monitor changes, and initiate workflows via platforms like Slack, Telegram, or Discord. Each agent operates within a distinct isolated container, ensuring individual budgets, specific tool permissions, persistent memory, skills compatible with MCP, and secure credentials that remain untouched by the agents themselves. This robust architecture not only enhances security but also fosters a seamless interaction among agents, ultimately streamlining operations across various business functions.

The fastest way to integrate APIs, and run code. Pipedream is a serverless computing platform and integration platform that makes it easy for developers to create event-driven workflows and connect apps. Any API can be turned into an event stream by creating event sources. You can create event sources to listen for tweets, Github events or Airtable records. You can inspect events in a human-friendly manner, trigger Node.js workflows for every event, and consume events in your app via API. Node.js code steps are used to create workflows that run on every event. You can write your own Node.js and use any npm packages. Or you can reuse actions that scaffold popular APIs. You can trigger via sources, a custom URL, email address or SDK code, or a schedule. Connect to Auth apps once and they will continue to work in your workflow. Pipedream supports OAuth, key-based auth and handles token refresh and OAuth flow for you. Simply link accounts to steps, and include the appropriate auth information in code.

Agent Builder is a component of OpenAI’s suite designed for creating agentic applications, which are systems that leverage large language models to autonomously carry out multi-step tasks while incorporating governance, tool integration, memory, orchestration, and observability features. This platform provides a flexible collection of components—such as models, tools, memory/state, guardrails, and workflow orchestration—which developers can piece together to create agents that determine the appropriate moments to utilize a tool, take action, or pause and transfer control. Additionally, OpenAI has introduced a new Responses API that merges chat functions with integrated tool usage, alongside an Agents SDK available in Python and JS/TS that simplifies the control loop, enforces guardrails (validations on inputs and outputs), manages agent handoffs, oversees session management, and tracks agent activities. Furthermore, agents can be enhanced with various built-in tools, including web search, file search, or computer functionalities, as well as custom function-calling tools, allowing for a diverse range of operational capabilities. Overall, this comprehensive ecosystem empowers developers to craft sophisticated applications that can adapt and respond to user needs with remarkable efficiency.

Redpanda is a high-performance data streaming platform purpose-built for running AI agents securely across enterprise data ecosystems. Its Agentic Data Plane provides centralized access, governance, and observability for agents operating on real-time and historical data. Redpanda connects hundreds of data sources across on-prem, VPC, and cloud environments into a unified plane. A single SQL query layer allows agents to analyze data in motion and at rest without switching tools. Built-in identity, authorization, and policy controls govern every agent action before it happens. Every interaction is captured in immutable audit logs that can be replayed end to end. Redpanda integrates with open standards like Kafka, Iceberg, SQL, MCP, and A2A, avoiding lock-in. Designed for speed and safety, it enables enterprises to deploy AI agents with confidence. The result is a scalable, governed foundation for autonomous and multi-agent systems.

Adopt AI helps modern applications deliver an agentic experience to their end users within days. Using Adopt, end users of applications can execute complex actions across their application via natural language commands, automate workflows and unlock new possibilities for application innovation. In this future, AI agents will understand application/website workflows, know which components to call, create dynamic plans, and execute those plans to achieve desired outcomes. This approach means that humans will no longer need to learn how to use applications; instead, they can interact with AI in natural language to accomplish tasks or have AI automatically perform tasks based on schedules or triggers. Adopt AI is helping companies race against time to build their own AI copilot and set of autonomous/semi-autonomous agents.

QVeris serves as an infrastructure for AI agents tailored for developers, focusing on MCP and skills-oriented agents. It offers a cohesive API that allows users to discover, access, and utilize over 10,000 real-world tools, APIs, and data resources, empowering LLMs and AI agents to analyze, fetch information, and perform real-world tasks efficiently and at scale. This innovative approach significantly enhances the capabilities and versatility of AI applications in various domains.