A Magento REST API example with rauth as OAuth provider. For Magento 1

magento-cli.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from rauth.service import OAuth1Service

# Create consumer key & secret in your Magento Admin interface
# For an API Guideline see:
# http://www.magentocommerce.com/api/rest/authentication/oauth_authentication.html
#
# Short Magento setup explanation:
# 1. Magento Admin > System > Web Services > REST - OAuth Consumers:
#    Add a new consumer for this script [maybe the OAuth1Service(name='') value]
#    (This creates the consumer_key and consumer_secret token for you)
# 2. Possibly enable rewriting rules for the /api url in the Magento .htaccess
# 3. Magento Admin > System > Web Services > REST - Roles:
#    Give the Customer account some access to stuff (using the customer authorize_url below)
#    or create an Admin account for write access (using the admin authorize_url below)
#    Give the Guest account some access for some basic functionality testing without authorization.
# 4. Magento Admin > System > Web Services > REST - Attributes:
#    Configure ACL attributes access for the role/account configured in 3rd
# -  The customer must have a (frontend) account to login to and authorize the script.
# -  For any created Admin roles in 3rd, the role needs to be mapped to an admin user:
# 5. Magento Admin > System > Permissions > Users:
#    Edit an admin user and under 'REST Role', tick the created Admin REST Role to map it to that account.
#    This admin will get the authorize_url to authorize your script access in the browser.

MAGENTO_HOST = 'http://127.0.0.1'
MAGENTO_API_BASE = '%s/api/rest/' % MAGENTO_HOST

magento = OAuth1Service(
    name               = 'magento',
    consumer_key       = 'vygdq11yzaectqwbpn1h4zwlamsrpomi',
    consumer_secret    = '5x5idvqc8rh4vc8lrxeg4hvple0u63dt',
    request_token_url  = '%s/oauth/initiate' % MAGENTO_HOST,
    access_token_url   = '%s/oauth/token' % MAGENTO_HOST,
    # Customer authorization
    #authorize_url     = '%s/oauth/authorize' % MAGENTO_HOST,
    # Admin authorize url depending on admin url
    authorize_url      = '%s/admin/oauth_authorize' % MAGENTO_HOST,
    base_url           = MAGENTO_API_BASE
)

# get request token
request_token, request_token_secret = magento.get_request_token(method='POST', params={'oauth_callback': 'oob'})

# authorize us
authorize_url = magento.get_authorize_url(request_token)

print 'Visit this URL in your browser: ' + authorize_url
code = raw_input('Paste Code from browser: ')

session = magento.get_auth_session(request_token,
                                   request_token_secret,
                                   method='POST',
                                   data={'oauth_verifier': code})

headers = {'Accept': 'application/json'}
r = session.get('products', headers=headers)

articles = r.json()

for i, product in articles.items():
    id = product['sku'].encode('utf-8')
    text = product['description'].encode('utf-8')
    print '{0}. ArtNr: {1} - {2}'.format(i, id, text)

session.close()

magento-rauth-example.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from rauth.service import OAuth1Service
import json
from urlparse import urljoin

# Create consumer key & secret in your Magento Admin interface
# For an API Guideline see:
# http://www.magentocommerce.com/api/rest/authentication/oauth_authentication.html
#
# Short Magento setup explanation:
# 1. Magento Admin > System > Web Services > REST - OAuth Consumers:
#    Add a new consumer for this script [maybe the OAuth1Service(name='') value]
#    (This creates the consumer_key and consumer_secret token for you)
# 2. Possibly enable rewriting rules for the /api url in the Magento .htaccess
# 3. Magento Admin > System > Web Services > REST - Roles:
#    Give the Customer account some access to stuff (using the customer authorize_url below)
#    or create an Admin account for write access (using the admin authorize_url below)
#    Give the Guest account some access for some basic functionality testing without authorization.
# 4. Magento Admin > System > Web Services > REST - Attributes:
#    Configure ACL attributes access for the role/account configured in 3rd
# -  The customer must have a (frontend) account to login to and authorize the script.
# -  For any created Admin roles in 3rd, the role needs to be mapped to an admin user:
# 5. Magento Admin > System > Permissions > Users:
#    Edit an admin user and under 'REST Role', tick the created Admin REST Role to map it to that account.
#    This admin will get the authorize_url to authorize your script access in the browser.

MAGENTO_HOST = 'http://127.0.0.1'
MAGENTO_API_BASE = '%s/api/rest/' % MAGENTO_HOST

magento = OAuth1Service(
    name               = 'magento',
    consumer_key       = 'vygdq11yzaectqwbpn1h4zwlamsrpomi',
    consumer_secret    = '5x5idvqc8rh4vc8lrxeg4hvple0u63dt',
    request_token_url  = '%s/oauth/initiate' % MAGENTO_HOST,
    access_token_url   = '%s/oauth/token' % MAGENTO_HOST,
    # Customer authorization
    #authorize_url     = '%s/oauth/authorize' % MAGENTO_HOST,
    # Admin authorize url depending on admin url
    authorize_url      = '%s/admin/oauth_authorize' % MAGENTO_HOST,
    base_url           = MAGENTO_API_BASE
)

"""
# get request token
request_token, request_token_secret = magento.get_request_token(method='POST', params={'oauth_callback': 'oob'})

print 'Our request token is: ' + request_token
print '     token secret is: ' + request_token_secret
print

# authorize us
authorize_url = magento.get_authorize_url(request_token)

print 'Visit this URL in your browser: ' + authorize_url
code = raw_input('Paste Code from browser: ')

#session = magento.get_auth_session(request_token, request_token_secret, method='POST', data=params)
#session = magento.get_auth_session(request_token, request_token_secret, method='GET', params=params)

# -- get access token
access_token, access_token_secret = magento.get_access_token(request_token=request_token,
                                                             request_token_secret=request_token_secret,
                                                             method='POST',
                                                             data={'oauth_verifier': code})

print 'Our access token is: ' + access_token
print '    token secret is: ' + access_token_secret
print
"""

access_token = '<save access_token here for reuse>'
access_token_secret = '<save access_token here for reuse>'

tok = access_token, access_token_secret
session = magento.get_session(token=tok, signature=None)


## example GET request

headers = {'Accept': 'application/json'}
#headers = {'Accept': 'application/xml'}

r = session.get(
    'products',
    #'products/1/categories',
    #'customers',
    #'stockitems',
    #'products?filter[1][attribute]=entity_id&filter[1][gt]=4'
    headers=headers,
    #header_auth=True,
)

print r.request.headers
print r.json()
print


## example POST request

headers = {'Content-Type': 'application/json', 'Accept': 'application/json'}

# - create a product

product = """{
"type_id": "simple",
"attribute_set_id": "4",
"sku": "TestArticle1",
"name": "Test Article 70mm² M12",
"price": "3.5200",
"description": "This Product has the bare minimum required attributes to get inserted",
"short_description": "Test Article 70mm² M12",
"weight": "0.0000",
"status": "1",
"visibility": "4",
"tax_class_id": "2"
}"""

payload = json.loads(product)
r = session.post(
    'products',
    header_auth=True,
    headers=headers,
    data=json.dumps(payload),
)

# see if we have errors
if r.status_code != 200:
    print 'Error!'
    print r.text
    quit()
else:
    # catch the returned Location redirect to the new product
    article_url = urljoin(MAGENTO_API_BASE, r.headers['location'])
    print 'New product inserted as: %s' % (article_url)


# - assign new product to a category (so it will be visible in frontend)
#   FIX THIS TO A CATEGORY ID WHICH EXISTS AND IS NOT ROOT

payload = json.dumps({'category_id': '2'})
r = session.post(
    article_url + '/categories',
    header_auth=True,
    headers=headers,
    data=payload,
)

# see if we have errors
if r.status_code != 200:
    print 'Error!'
    print r.text
    quit()
else:
    article_url = urljoin(MAGENTO_API_BASE, r.headers['location'])
    print 'Success! Product added to category: %s' % (article_url)
    print r.request.headers


session.close()

Hi guys, sorry I don't get notifies on gist comments, unless you @mention me.

Late comment: A 400 error probably meant the API wasn't enabled or credentials were wrong.

@blob84, your magento apparently returned some data that couldn't be decoded using utf-8.
I don't know why this happens, if the API is enabled I think that should happen.
Note this was built for the Magento 1 API.