APIM subscription key

In the Ultra Transcenders books

SC-500AI-103

Each book explains APIM subscription key in context, with comparison tables and the common traps.

Terms in this definition

• Index field attributes

  Settings applied to each field in an Azure AI Search index: searchable for full text, retrievable to return it, filterable for exact-match $filter, sortable, facetable for counts, and key for the unique document ID.

• State

  A parameter in OAuth that carries custom data through the authorisation flow and back, as with the "Support state parameter" option in APIM.

• API Management

  Azure's API gateway, where policies like rate limits, quotas, ip-filter and validate-jwt are defined once and apply to every API. Production VNet injection is offered in the Premium tier.

• Microsoft Entra

  The umbrella brand covering Microsoft's identity and network access portfolio. Internet Access, Private Access, External ID and ID Governance all belong to it, built on top of the core directory service, Entra ID.

• Token

  The unit of text an LLM works with, which may be a word, part of a word or punctuation. Billing, limits and context windows are all counted in these units.

• Foundry Tools

  Microsoft's collection of AI APIs that can be used ready-made or customised, spanning areas such as Vision, Speech, Language, Document Intelligence, Content Safety and Content Understanding.

• LIKE

  Compares strings with a pattern that can contain the % and _ wildcards. Because it only understands character patterns, searching big volumes of text this way is much slower than using full-text search.

• CRUD

  Shorthand for create, read, update and delete, the four basic things you do with data. Data-plane roles in Azure Cosmos DB, for instance, authorise those operations on items.