How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Microsoft Outlook Attachments API

Operations on message attachments

Microsoft Outlook Attachments API is one of 4 APIs that Microsoft Outlook publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 1 JSON Schema definition.

Tagged areas include Attachments. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a JSON-LD context, authentication docs, a getting-started guide, an API reference, and 1 JSON Schema.

This API exposes 5 operations across 3 paths, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://graph.microsoft.com/v1.0.

5 operations 3 paths 4 schemas 1 DELETE2 GET2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://graph.microsoft.com/v1.0
Authentication
OAuth 2.0
Resource Areas
1

Authentication & Security 1

Microsoft Outlook Attachments API declares 1 security scheme for authenticating requests. It supports OAuth 2.0 (oauth2) using the authorizationCode flow, exposing 6 scopes. By default, every request must be authenticated.

  • oauth2 — Microsoft identity platform OAuth 2.0 authorization. Supports delegated (user) and application permissions.

Paths & Operations 5

Across 3 paths, the API surfaces 5 operations — 1 DELETE, 2 GET, 2 POST. Each is listed below with its method, path, parameters, and response codes.

Attachments 5

Operations on message attachments

GET
/me/messages/{message-id}/attachments
Microsoft Outlook List Attachments
listAttachments 3 params → 200401404429
POST
/me/messages/{message-id}/attachments
Microsoft Outlook Add Attachment
addAttachment 1 param body → 201400401404429
GET
/me/messages/{message-id}/attachments/{attachment-id}
Microsoft Outlook Get Attachment
getAttachment 3 params → 200401404429
DELETE
/me/messages/{message-id}/attachments/{attachment-id}
Microsoft Outlook Delete Attachment
deleteAttachment 2 params → 204401404429
POST
/me/messages/{message-id}/attachments/createUploadSession
Microsoft Outlook Create Upload Session for Large Attachment
createAttachmentUploadSession 1 param body → 201400401404

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are Attachment (10 properties), UploadSession (3 properties), AttachmentCollectionResponse (2 properties), ODataError (1 property). Each schema is shown below with its type and property counts.

UploadSession
object
Represents the upload session for iterative file upload.
3 properties
Attachment
object
Base resource for file, item, and reference attachments. Use the @odata.type property to specify the derived type.
10 properties
ODataError
object
OData error response from Microsoft Graph.
1 property
AttachmentCollectionResponse
object
Collection of attachment resources.
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

microsoft-outlook-attachments-api-openapi.yml Raw ↑

Other APIs Microsoft Outlook publishes across the network.

Outlook Add-ins API
Microsoft Outlook Mail Folders API
Microsoft Outlook Messages API
Where this information came from

This is an independent, third-party profile of Microsoft Outlook Attachments API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.