# Instance

## Settings

```yaml
###########################
##### INSTANCE CONFIG #####
###########################

# Config pertaining to instance federation settings, pages to hide/expose, etc.

# Array of string. BCP47 language tags to indicate preferred languages of users on this instance.
#
# If you provide these, you should provide these in order from most-preferred to least-preferred,
# but note that leaving out a language from this array doesn't mean it can't be used on this instance,
# it only means it won't be advertised as a preferred instance language.
#
# It is valid to provide no entries here; your instance will then have no particular preferred language.
#
# See here for commonly-used tags: https://en.wikipedia.org/wiki/IETF_language_tag#List_of_common_primary_language_subtags
# See here for all current tags: https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
#
# Example: ["nl", "en-gb", "fr"]
# Default: []
instance-languages: []

# String. Federation mode to use for this instance.
#
# "blocklist" -- open federation by default. Only instances that are explicitly 
#                blocked will be denied (unless they are also explicitly allowed).
#
# "allowlist" -- closed federation by default. Only instances that are explicitly
#                allowed will be able to interact with this instance.
#
# For more details on blocklist and allowlist modes, check the documentation at:
# https://docs.gotosocial.org/en/latest/admin/federation_modes
#
# Options: ["blocklist", "allowlist"]
# Default: "blocklist"
instance-federation-mode: "blocklist"

# Bool. Enable spam filtering heuristics for messages entering your instance
# via the federation API. Regardless of what you set here, basic checks
# for message relevancy will still be performed, but you can try enabling
# this setting if you are being spammed with unwanted messages from other
# instances, and want to more strictly filter out spam messages.
#
# THIS IS CURRENTLY AN EXPERIMENTAL SETTING, AND MAY FILTER OUT LEGITIMATE
# MESSAGES, OR FAIL TO FILTER OUT SPAMMY MESSAGES. It is recommended to
# only enable this setting when the fediverse is in the midst of a spam
# wave, and you need to batten down the hatches to keep your instance usable.
#
# The decision of whether a message counts as spam or not is made based on
# the following heuristics, in order, where receiver = the account on your
# instance that received a message in their inbox, and requester = the
# account on a remote instance that sent the message.
#
# First, basic relevancy checks
#
#  1. Receiver follows requester. Return OK.
#  2. Statusable doesn't mention receiver. Return NotRelevant.
#
# If instance-federation-spam-filter = false, then return OK now.
# Otherwise check:
#
#  3. Receiver is locked and is followed by requester. Return OK.
#  4. Five or more people are mentioned. Return Spam.
#  5. Receiver follow (requests) a mentioned account. Return OK.
#  6. Statusable has a media attachment. Return Spam.
#  7. Statusable contains non-mention, non-hashtag links. Return Spam.
#
# Messages identified as spam will be dropped from your instance, and not
# inserted into the database, or into home timelines or notifications.
#
# Options: [true, false]
# Default: false
instance-federation-spam-filter: false

# Bool. Allow unauthenticated users to make queries to /api/v1/instance/peers?filter=open in order
# to see a list of instances that this instance 'peers' with. Even if set to 'false', then authenticated
# users (members of the instance) will still be able to query the endpoint.
# Options: [true, false]
# Default: false
instance-expose-peers: false

# Bool. Allow unauthenticated users to make queries to /api/v1/instance/peers?filter=suspended in order
# to see a list of instances that this instance blocks/suspends. Even if set to 'false', then authenticated
# users (members of the instance) will still be able to query the endpoint.
#
# WARNING: Setting this variable to 'true' may result in your instance being scraped by blocklist scrapers.
# See: https://docs.gotosocial.org/en/latest/admin/domain_blocks/#block-announce-bots
#
# Options: [true, false]
# Default: false
instance-expose-suspended: false

# Bool. Allow unauthenticated users to view /about/suspended,
# showing the HTML rendered list of instances that this instance blocks/suspends.
# Options: [true, false]
# Default: false
instance-expose-suspended-web: false

# Bool. Allow unauthenticated users to make queries to /api/v1/timelines/public in order
# to see a list of public posts on this server. Even if set to 'false', then authenticated
# users (members of the instance) will still be able to query the endpoint.
# Options: [true, false]
# Default: false
instance-expose-public-timeline: false

# Bool. This flag tweaks whether GoToSocial will deliver ActivityPub messages
# to the shared inbox of a recipient, if one is available, instead of delivering
# each message to each actor who should receive a message individually.
#
# Shared inbox delivery can significantly reduce network load when delivering
# to multiple recipients share an inbox (eg., on large Mastodon instances).
#
# See: https://www.w3.org/TR/activitypub/#shared-inbox-delivery
#
# Options: [true, false]
# Default: true
instance-deliver-to-shared-inboxes: true

# Bool. This flag will inject a Mastodon version into the version field that
# is included in /api/v1/instance. This version is often used by Mastodon clients
# to do API feature detection. By injecting a Mastodon compatible version, it is
# possible to cajole those clients to behave correctly with GoToSocial.
#
# Options: [true, false]
# Default: false
instance-inject-mastodon-version: false
```