25 lines
734 B
Plaintext
25 lines
734 B
Plaintext
---
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title: Introduction
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description: "Fundamental concepts of Usend's API."
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---
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## Base URL
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useSend's API is built on REST principles and is served over HTTPS. To ensure data privacy, unencrypted HTTP is not supported.
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The Base URL for all API endpoints is:
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```sh Terminal
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https://app.usesend.com/api/
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```
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## Authentication
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Authentication to Usend's API is performed via the Authorization header with a Bearer token. To authenticate, you need to include the Authorization header with the word Bearer followed by your token in your API requests like so:
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```sh Terminal
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Authorization: Bearer us_12345
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```
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You can create a new token/API key under your useSend [Developer Settings](https://app.usesend.com/dev-settings/api-keys).
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