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As you look to connect your AI agents, you’ll likely need to outsource most integrations to manage your engineering capacity effectively.
But what type of integration platform should you use?
We’ll help you decide by breaking down the best AI integration solutions.
But first, let’s align on the definition of an AI integration platform and explain why you’d want to use one to begin with.
It’s a 3rd-party software that lets you connect AI agents to external data sources, either through API endpoints or MCP tools (which can include API requests). These integrations can be built in your product or between your organization’s business applications.

Here’s a closer at an AI integration platform’s core components:
Related: What are AI connectors?
Here are just a few reasons why AI integration platforms are often critical:
Building and maintaining integrations, whether through MCP servers or API endpoints, can take your engineers hundreds of hours. And the process of maintaining these integrations can be an even bigger burden on your team, as this work lasts as long as the lifespans of your integrations.
AI integration platforms often take this work off your engineers' plates by providing pre-built and managed MCP servers and API connectors.

Your engineers can use the time they save on building and maintaining AI integrations on other tasks they’re more likely to enjoy, such as building or improving your core product.
They can also avoid all the stress that comes with handling integration issues, whether that’s dealing with frustrated employees, angry customers, and/or disappointed prospects.
Many AI integration platforms offer more secure integrations than open-source options.
For example, if you search for MCP servers for a given tool, you might come across community servers that seem safe but were created by malicious actors to steal sensitive data.
AI integration tools can provide trust-worthy MCP servers and API connectors, and let you add rules on top of them to prevent (or redact/log) your agents from accessing and sharing sensitive data, whether that’s social security numbers, passport numbers, email addresses, and so on.

If you and your team are like most, you're implementing integrations for your agents for the first time.
To help guide you on the best ways to build these integrations, observe your agents’ API requests and/or tool calls, and handle any other aspect of your agents’ integrations, these platforms may give you direct access to experts who can answer your questions—and potentially even implement the integrations on your behalf.
To help pressure-test your integrations, identify specific issues, and remedy them—all before your end users are impacted—AI integration platforms may offer structured tests against realistic prompts and test cases. This can help validate that your agents use tools and API endpoints correctly and produce expected outcomes.
You may even be able to test your agents’ authentication implementations and verify that your agents surface authentication flows at the appropriate points in time.

Here are some AI agent integration platforms to consider:
Composio provides tools and infrastructure for connecting AI agents to external services and APIs.
Related: Alternatives to Composio
Workato offers several integration solutions that can support your agents, including their integration platform as a service (iPaaS), embedded iPaaS, and their new “Workato Enterprise MCP” offering.
Related: Alternatives to Workato
Merge offers two products, Merge Unified and Merge Agent Handler, that can support your agents’ integrations.

Merge Unified lets you add thousands of integrations to your product through a unified API.
This works great when you’re building agents in your product and you need them to support relatively static, predefined workflows (e.g., when a user clicks a button in your product to trigger a particular process).
Merge Agent Handler lets you add thousands of tools to your agents securely across dozens of fully-managed MCP servers. This is likely the better option when you’re building internal or customer-facing agents that need to make decisions on the fly (i.e., deciding what tools to call based on a user’s input).
For both products, Merge's enterprise-grade platform handles the entire integration lifecycle, from authentication and security to monitoring and maintenance.
Learn more about each product and decide which is right for your agents by scheduling a demo with one of our integration experts.
In case you have any more questions on AI integration platforms, we’ve addressed several more below.
An AI integration platform can overlap with an iPaaS, such as Workato, Boomi, Mulesoft, Celigo, or any other. For example, many iPaaSs provide connectors with LLMs (e.g., OpenAI) to help companies build intelligent workflow automations.
However, AI integration platforms can extend beyond this software category. For instance, they can include tool-calling platforms, like Merge Agent Handler, that can help you connect agents to MCP tools.
An AI integration platform can include API integrations, but it can also include other connectivity methods, whether that’s MCP servers’ tools or custom scripts. An API integration platform, on the other hand, is narrowly focused on supporting API-based integrations.
You can connect an AI agent to Linear's MCP server to access tools like <code class="blog_inline-code">list_ticket</code>, <code class="blog_inline-code">create_ticket</code>, <code class="blog_inline-code">update_ticket</code>, and <code class="blog_inline-code">delete_ticket</code>.
Here's how an agentic workflow could then work:
1. An employee sends a plain text instruction in Slack (e.g., "Create a high-priority ticket for the API timeout issue in the mobile app").
2. The agent analyzes the request and determines which Linear tool to call.
3. The agent executes the action in Linear using the appropriate credentials. If authentication is needed, it prompts the employee to connect their Linear account.
4. Once complete, the agent responds in Slack with a confirmation message as well as a link to the newly-created or updated ticket.
Here are some best practices worth following:
1. Review the platforms’ reviews on 3rd-party sites. G2 is a particularly great source because it not only provides individual reviews and an overall rating for a given vendor but also offers up grids in software categories that let you directly compare solutions.
For example, if you’re considering a unified API solution to power your product’s enterprise search, the grid below can be an easy way to pinpoint the best vendor.

2. Look at case studies for similar use cases. Many vendors will have case studies that directly apply to your use case. At the very least, they should be able to point to specific customers that use their solution similarly to how you're planning on using it.
3. Participate in a proof of concept. Given how new and cutting-edge your AI integration use cases are, you shouldn’t take vendors at their word. Ask for a proof of concept (PoC) that’s a few weeks long and will give you a chance to actually implement and test at least one of your AI integration use cases.