Example implementation of a Mastodon API client

mastodon_client.sh

if [ -z $OAUTH_TOKEN ]
then
    
    if [ -z $CLIENT_ID ]
    then
        APP_INFO=$(curl -s -X POST \
            -F 'client_name=Example App' \
            -F 'redirect_uris=urn:ietf:wg:oauth:2.0:oob' \
            -F 'scopes=read' \
            -F 'website=https://example.com' \
            https://mastodon.social/api/v1/apps
        )
        echo $APP_INFO
        
        CLIENT_ID=$(echo $APP_INFO | jq -r '.client_id')
        CLIENT_SECRET=$(echo $APP_INFO | jq -r '.client_secret')
        echo $CLIENT_ID
        echo $CLIENT_SECRET
    fi
    
    OAUTH_TOKEN=$(curl -s -X POST \
        -F 'client_id=$CLIENT_ID' \
        -F 'client_secret=$CLIENT_SECRET' \
        -F 'redirect_uri=urn:ietf:wg:oauth:2.0:oob' \
        -F 'grant_type=client_credentials' \
        https://mastodon.social/oauth/token
    )
    
    echo $OAUTH_TOKEN
    echo "Set oauth token for future calls"
fi

# Lookup an account by webfinger such as @17Christiana@pixelfed.social
ACCOUNT=$(curl -s \
    -H 'Authorization $OAUTH_TOKEN' \
    https://mastodon.social/api/v1/accounts/lookup?acct=$WEBFINGER
)

# Print account info
echo $ACCOUNT | jq

ACCOUNT_ID=$(echo $ACCOUNT | jq '.id')

# Get statuses for an account
STATUSES=$(curl -s \
    -H 'Authorization $OAUTH_TOKEN' \
    https://mastodon.social/api/v1/accounts/$ACCOUNT_ID/statuses?exclude_replies=true&exclude_reblogs=true&limit=10
)
echo $STATUSES