nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq6a2rqwxetkllufxsyjjjddphp7qzxapp62smyxsgtnz4j5pmvwvqrhdavq (nprofile…davq)
What happens when you send a "Offer" message to an actor on Mastodon?
The behavior of Offer activity is not described in ActivityPub, so Mastodon is not required to support it. Curiously, ActivityPub mentions Offer when it talks about the side effects of Accept:
The side effect of receiving this in an inbox is determined by the type of the object received, and it is possible to accept types not described in this document (for example, an Offer).
...This statement is not compatible with the idea of a generic server.
Can I create a group actor on Mastodon?
I don't know. But it can create Service actors, I guess it can be easily patched to allow creation of Group actors too.
Can I use this actor to boost other actor's posts and have it visible on a Lemmy client?
I think FEP-1b12 Announce is not compatible with ActivityPub. It has different side effects, doesn't update shares collection.
How can a Mastodon client ask the server to get a collection of all images with an specific tag?
Maybe something like /api/v1/timelines/tag/{tag}?only_media=true ?
nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqku30mphs68tg30c4jj0d80g698resvue70hhrvnawxvdfaq4p0ushyd8rs (nprofile…d8rs)
silverpill
npub1df…27gmw
2026-02-27 18:12:45 UTC
in reply to nevent1q…dqhl
Author Public Key
npub1df0nthpgzfmvxrzj0cfypmmt45l0y770j260auqhm3l45hp3uhkqx27gmwSeen on
wss://relay.ditto.pubPublished at
2026-02-27 18:12:45 UTCEvent JSON
{
"id": "ba194b694f469914be635672e207511eca3882bcd418c10f8336365093c494dc",
"pubkey": "6a5f35dc281276c30c527e1240ef6bad3ef27bcf92b4fef017dc7f5a5c31e5ec",
"created_at": 1772215965,
"kind": 1,
"tags": [
[
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],
[
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[
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],
[
"proxy",
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"activitypub"
],
[
"client",
"Mostr",
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],
"content": "nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq6a2rqwxetkllufxsyjjjddphp7qzxapp62smyxsgtnz4j5pmvwvqrhdavq\n\nWhat happens when you send a \"Offer\" message to an actor on Mastodon?\n\nThe behavior of Offer activity is not described in ActivityPub, so Mastodon is not required to support it. Curiously, ActivityPub mentions Offer when it talks about the side effects of Accept:\n\nThe side effect of receiving this in an inbox is determined by the type of the object received, and it is possible to accept types not described in this document (for example, an Offer).\n\n...This statement is not compatible with the idea of a generic server.\n\nCan I create a group actor on Mastodon?\n\nI don't know. But it can create Service actors, I guess it can be easily patched to allow creation of Group actors too.\n\nCan I use this actor to boost other actor's posts and have it visible on a Lemmy client?\n\nI think FEP-1b12 Announce is not compatible with ActivityPub. It has different side effects, doesn't update shares collection.\n\nHow can a Mastodon client ask the server to get a collection of all images with an specific tag?\n\nMaybe something like /api/v1/timelines/tag/{tag}?only_media=true ?\n\nnostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqku30mphs68tg30c4jj0d80g698resvue70hhrvnawxvdfaq4p0ushyd8rs",
"sig": "f2d70c9176fab304a2c5aaae2370b6764b31829d92ef679a0e58f2cc87bb350742761415cae48316f3491e107a065d7118b01c6bdd2b5e0ccf9b422d980c125c"
}