msgraph-typescript-typings

@microsoft/microsoft-graph-types packages the official TypeScript interface definitions for the Microsoft Graph API’s v1.0 data model — users, groups, messages, mail, calendar events, files, Teams, security, identity, and hundreds of other entities exposed by Microsoft 365 and Azure AD. The types are generated directly from Microsoft’s Graph metadata, so every property, enum, and nested type mirrors the actual JSON shape returned by the API.

Rather than shipping a full HTTP client, this package is a pure .d.ts companion: developers pair it with the Microsoft Graph JavaScript SDK (or any HTTP client) to get autocomplete, inline documentation, and compile-time type checking on request and response bodies. A parallel -types-beta package tracks the beta Graph endpoint for teams that need pre-release schema access.

What You Get

• Typed interfaces for hundreds of Graph entities (User, Message, Group, DriveItem, Team, Event, and more) matching the live API schema
• String-literal union types for Graph enums (status values, categories, filter options) instead of loose strings
• The NullableOption<T> helper type modeling Graph’s nullable-field JSON convention consistently across the type surface
• IntelliSense and inline per-property documentation in any TypeScript-aware editor (VS Code, WebStorm, Atom) with zero runtime code
• A parallel -types-beta package for pinning to the beta Graph schema when a project needs pre-release entities

Common Use Cases

• Casting Microsoft Graph JavaScript SDK responses (client.api('/me').get()) to typed objects like User or Message
• Building typed request payloads for Graph write operations (creating events, sending mail, updating group membership)
• Adding compile-time safety to Microsoft 365 integrations (Outlook, Teams, SharePoint, OneDrive) built in TypeScript
• Powering autocomplete and schema discovery for identity and access-management tooling built against Azure AD / Entra ID Graph endpoints

Under The Hood

Architecture The repo is minimal by design: the entire published surface is one generated microsoft-graph.d.ts file (roughly 39,000 lines) at the root, exported via the types field in package.json and consumed with export as namespace microsoftgraph. There is no runtime code, module graph, or layered structure — supporting infrastructure lives in scripts/src/*.ps1 (PowerShell automation for version bumping and release tagging) and .azure-pipelines/, which regenerate and publish the .d.ts from Microsoft’s internal Graph metadata rather than having it hand-edited. spec/*.ts holds a small set of Mocha specs (users.ts, groups.ts) that exercise the emitted types against the real @microsoft/microsoft-graph-client SDK to catch schema drift at compile time.

Tech Stack TypeScript 5.x (typescript ^5.0.3 devDependency), compiled per tsconfig.json targeting ES6/CommonJS with declaration: true and noImplicitAny: false (intentionally loose to keep generated types buildable). The test harness pairs mocha ^11 and chai ^6 with @types/node, running spec/*.ts against the live @microsoft/microsoft-graph-client (^3.0.5) as an integration-style type check rather than a unit test suite. Release automation runs through Azure Pipelines driving the PowerShell scripts plus release-please for changelog and version bumps (release-please-config.json, .release-please-manifest.json). No bundler, database, or web framework is present since this is a types-only package.

Code Quality Testing exists but is thin: two spec files under 5KB total, run via tsc && mocha spec/**.ts, which compile-check that live Graph API responses satisfy the User/Group interfaces rather than asserting isolated unit behavior — there is no runtime behavior of the package’s own to unit-test. Naming and structure in the .d.ts are inherited wholesale from the Microsoft Graph OData schema rather than authored; the maintainers’ actual hand-written surface is the small PowerShell release scripts, which are simple and imperative with minimal explicit error handling. No dedicated linter config is present for the TypeScript output beyond tsconfig.json; CI (Azure Pipelines plus GitHub Actions) automates versioning and publishing rather than gating code review.

API Design The package’s core developer-experience bet is a single flat namespace exposing every Graph v1.0 entity and enum behind one import (import { User } from '@microsoft/microsoft-graph-types'), with no client-library coupling required. Nullable Graph fields are modeled uniformly through a shared NullableOption<T> generic instead of scattering ad hoc | null unions, and enum-valued properties are typed as string-literal unions (e.g. AccessPackageRequestState) rather than string, catching typos the untyped Graph client alone can’t. Each property in the generated interfaces carries JSDoc pulled from Graph’s own metadata, so editors surface inline documentation without leaving the code. Because it ships zero runtime code, adoption cost is a single npm install --save-dev with no version-compatibility risk to the client library itself — the tradeoff is that the design is purely reflective of Microsoft’s own schema, kept current through automated regeneration rather than any novel abstraction.