A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

Type to find tags:
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You need help with the use of the Stack Exchange API, apps built on the API, or assistance building scripts that work on Stack Exchange websites.
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Indicates you've found an erroneous or unexpected behavior in the Stack Exchange API, or the Stack Exchange HTML or CSS, that needs to be fixed.
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Applications that use the Stack Exchange API or work on any of the Stack Exchange websites are listed as questions and tagged with this tag. The body of the question contains details and screenshots o…
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designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
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Indicates that a feature request has been implemented, a bug has been fixed, or another type of request has been processed.
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indicates a proposal for a new feature for the Stack Exchange API, or a change to an existing feature.
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A question about the Stack Exchange API: usage, functioning, guidelines, etc.
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to post a userscript that operates on Stack Exchange sites and/or uses the Stack Exchange API. For questions about user scripting and Stack Exchange, or its API, use the "scripts" tag in…
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for questions about the Stack Exchange API version 2.
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A question about how the API returns questions.
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Question pertaining to the documentation provided with the API.
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Questions about usage of the Stack Exchange API in client-side browser JavaScript.
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Question about any of the API methods that return, in some form, information about tags.
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A question about how the API returns users.
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actually due to the existing design of the system and is not considered erroneous behaviour.
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Questions about the built-in API help pages at <https://api.stackexchange.com/docs>.
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A question about how the API returns reputation for users.
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to POST, or announce, libraries which provide access to the Stack Exchange API and/or Stack exchange sites. The body of the question will give usage examples, as well as source and licen…
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A question about the Stack Exchange authentication process and related API methods.
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Questions about searching via the API, typically using the /search method.
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Questions about / scripts that mess around with Stack Exchange Chat.
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Apps accessible using web interfaces should use this tag. Questions about SE sites really shouldn't.
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Questions about whether [app]s with certain functionality exist. Some members of the community may react to these questions by creating those [app]s, should they not exist.
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Accompanies [app]s written in, or [library]s meant to be used from, the Python programming language
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For apps that don't quite work yet, but need a registered Stack Apps post for testing.
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For questions relating to version 2.1 of the Stack Exchange API.
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An [app] that takes the form of an extension to the Google Chrome browser.
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Indicates that a request (usually a feature request) has been considered, but will not be implemented. Generally speaking, a developer will leave a comment as to why, or the community will come to con…
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For questions relating to version 2.2 of the Stack Exchange API.
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the centralized domain used for network-wide authentication to any site in the network.
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A question about how the API returns answers.
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Questions about: throttling, the `backoff` flag, the quotas, or the rate limiting of requests made to the API. API calls are restricted both by per-second rates and by daily quotas.
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Questions handling comments using the API. Or, posts of Scripts / Apps / Libraries that facilitate dealing with comments on Stack Exchange sites.
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Accompanies [app]s written in, or [library]s meant to be used from, the C# programming language
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For *either* meta questions about Stack Apps, or about how per-site metas are exposed by the API. (Stack Apps is its own meta site)
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an open standard for authorization.