friendica/doc/api.md

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# Using the APIs
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<!-- markdownlint-disable MD010 MD013 MD024 -->
* [Home](help)
Friendica offers multiple API endpoints to interface with third-party applications:
- [Twitter](help/API-Twitter)
- [Mastodon](help/API-Mastodon)
- [Friendica-specific](help/API-Friendica)
- [GNU Social](help/API-GNU-Social)
## Usage
### HTTP Method
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API endpoints can restrict the HTTP method used to request them.
Using an invalid method results in HTTP error 405 "Method Not Allowed".
### Authentication
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Friendica supports basic HTTP Auth and OAuth to authenticate the user to the APIs.
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### Errors
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When an error occurs in API call, an HTTP error code is returned, with an error message
Usually:
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* 400 Bad Request: if parameters are missing or items can't be found
* 403 Forbidden: if the authenticated user is missing
* 405 Method Not Allowed: if API was called with an invalid method, eg. GET when API require POST
* 501 Not Implemented: if the requested API doesn't exist
* 500 Internal Server Error: on other error conditions
Error body is
json:
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```json
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{
"error": "Specific error message",
"request": "API path requested",
"code": "HTTP error code"
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}
```
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xml:
```xml
<status>
<error>Specific error message</error>
<request>API path requested</request>
<code>HTTP error code</code>
</status>
```
## Usage Examples
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### BASH / cURL
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```bash
/usr/bin/curl -u USER:PASS https://YOUR.FRIENDICA.TLD/api/statuses/update.xml -d source="some source id" -d status="the status you want to post"
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```
### Python
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The [RSStoFriendika](https://github.com/pafcu/RSStoFriendika) code can be used as an example of how to use the API with python.
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The lines for posting are located at [line 21](https://github.com/pafcu/RSStoFriendika/blob/master/RSStoFriendika.py#L21) and following.
def tweet(server, message, group_allow=None):
url = server + '/api/statuses/update'
urllib2.urlopen(url, urllib.urlencode({'status': message,'group_allow[]':group_allow}, doseq=True))
There is also a [module for python 3](https://bitbucket.org/tobiasd/python-friendica) for using the API.