LTI integration explained: how LTI 1.3 and LTI Advantage connect external tools to your LMS securely, with deep linking and grade passback.
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LTI integration is the standard way to plug an external tool — a content library, a simulation, a proctoring service, an authoring platform — into your LMS so it launches in place, recognizes the learner, and sends results back. The current version, LTI 1.3, does this over a secure, modern authentication model and adds capabilities like deep linking and grade passback. For an organization that owns its platform, LTI is what keeps you from hard-wiring every vendor tool one custom integration at a time.
This post explains what LTI 1.3 is, what it actually enables, how it differs from SSO and API work, and why it matters when you're connecting third-party tools to a platform you control.
LTI stands for Learning Tools Interoperability. It's an open standard maintained by 1EdTech (formerly IMS Global) that defines how an LMS — the "platform" — and an external tool talk to each other. The LMS launches the tool, passes along who the learner is and what context they're in, and receives results.
LTI 1.3 is the modern version, and it's a meaningful upgrade over the older 1.1. Earlier LTI relied on a shared secret and a signing method that's now dated. LTI 1.3 is built on OAuth 2.0, OpenID Connect, and signed JSON Web Tokens — the same security primitives used across modern web authentication. The bundle of services that ships with it is branded LTI Advantage.
Three capabilities do most of the work in practice.
Single launch with identity and context. A learner clicks a link in your LMS and lands inside the external tool already identified and placed in the right course or activity — no separate login, no copy-pasting rosters. The tool knows who they are and why they're there.
Deep linking. Instead of pasting a raw URL, an administrator or course builder browses the external tool's catalog from inside the LMS and selects specific content to embed. The tool hands back a structured link the LMS stores as an activity. This is what makes adding a vendor's course, simulation, or assessment feel native rather than bolted on.
Grade passback (Assignment and Grade Services). When the learner finishes the external activity, the tool sends scores and completion back into the LMS gradebook automatically. For compliance and certification work, this is the part that matters: the result lands in the system of record without anyone re-keying it.
LTI Advantage also includes Names and Role Provisioning Services, which lets the tool retrieve the course roster and each person's role securely — useful for tools that need to know the full class, not just the launching user.
LTI overlaps with other integration work, so it's worth being precise. These are complementary, not competing.
A quick way to keep them straight: SSO gets your people into the LMS; HRIS sync keeps who they are correct; LTI connects the tools they use once inside; and custom APIs handle anything the standards don't. The patterns behind the last row are covered in our integration patterns post, and the directory side is the subject of HRIS integration.
Yes. Moodle has supported LTI for years and supports LTI 1.3 / LTI Advantage, acting as either the platform (consuming external tools) or, with the right setup, as a tool provider. That's one of the practical advantages of building on a mature, open codebase: the interoperability standard your content vendors expect is already there, not a paid add-on you have to license per connection.
That said, supporting the standard and configuring it correctly are different things. Registering a tool with LTI 1.3 means exchanging keys and endpoints, mapping roles, and deciding which services (deep linking, grade passback, roster access) each tool is allowed to use. Getting role mapping and grade passback right across multiple sites is where the real work sits.
If you rent a SaaS LMS, the set of tools you can connect — and how cleanly — is partly the vendor's decision, and premium connectors are a common line item. Because LTI is an open standard, a platform you own can connect to any LTI-compliant tool on the market without per-connection licensing or waiting on a roadmap.
For a multi-site organization, that's leverage. You can standardize on the content vendors and specialized tools that fit each site's needs, embed them through deep linking, and have results flow back to one gradebook — all under your control. When you change a vendor, you swap the LTI registration; you don't rebuild an integration. How those tool launches and registrations are configured and rolled out across environments is part of deployment.
One caution worth keeping: LTI capabilities and version support vary by tool. Before committing to a vendor, verify with them directly that they support LTI 1.3 and the specific services you need — particularly grade passback — rather than assuming "LTI support" means all of LTI Advantage.
LTI integration is the open standard for connecting external learning tools to your LMS. LTI 1.3, with its LTI Advantage services, runs on modern OAuth/OIDC security and enables in-context launch, deep linking to embed specific content, and grade passback so results land in your gradebook automatically. It's distinct from SSO and HRIS sync, which handle login and user provisioning. Moodle supports it natively — which means a platform you own can connect to any LTI-compliant tool without per-connection fees or vendor gatekeeping. Confirm each vendor's exact LTI support before you standardize.