io.github.cameronrye/activitypub-mcp
NPM · ACTIVITYPUB-MCP
Read-only-by-default MCP server: let LLMs explore the Fediverse — Mastodon, Misskey, Pleroma.
Available components
Last scanned (2 hours ago)
Scores higher than 99% of npm servers
Category News and Social
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 30 of 94 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to cameronrye/activitypub-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 135 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability87
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1501 tokens (~53/item across 28 items; 18 tools + 10 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 18 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 19 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 0
- Stability: 0.97 → pass security
- 4 Nov 26 0
- Stability: pass → 0.97 functional
- 29 Oct 26 0
- Stability: 0.97 → pass security
- 28 Oct 26 0
- Stability: pass → 0.97 functional
- 26 Oct 26 +1
- Security disclosure: unverified → pass ▲ functional
- 25 Oct 26 −1
- Security disclosure: pass → unverified ▼ functional
- 22 Oct 26 0
- Stability: 0.97 → pass security
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Analysed npm/activitypub-mcp@3.2.1
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | cameronrye/activitypub-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/cameronrye/activitypub-mcp/.github/workflows/release.yml@refs/heads/main |
| Rekor log index | 1912314010 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:2259f03feb5769afdb7e1efdb85ba6440c111170385b63b3d4b1917156183e3a53d89864b01c58ec0227be9778403883f53b2816d9b4e953506ef56c8 |
Background: How many MCP packages publish verified provenance →
Dependencies 94 packages
| Packages resolved | 94 |
|---|---|
| Stale | 30 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
discover-actor Discover Fediverse Actor ~100
Find and retrieve the profile of any fediverse user or account (called an 'actor' in ActivityPub). Returns display name, bio, follower/following URLs, and inbox/outbox endpoints. Pass a handle like '@alice@mastodon.social' or 'alice@mastodon.social'.
| Name | Type | Req | Description |
|---|---|---|---|
| identifier | string | yes | Actor handle in 'user@domain' or '@user@domain' form (e.g., 'alice@mastodon.social') |
| Name | Type | Req | Description |
|---|---|---|---|
| actor | object | yes | – |
No examples provided.
discover-instances Discover Fediverse Instances ~139
Discover fediverse instances in real-time using the instances.social API with advanced filtering
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | – | Filter by language code (e.g., 'en', 'de', 'ja') |
| limit | number | – | Number of results (default: 20) |
| maxUsers | number | – | Maximum number of users |
| minUsers | number | – | Minimum number of users |
| openRegistrations | boolean | – | Only show instances with open registrations |
| software | string | – | Filter by software type |
| sortBy | string | – | Sort results by field |
| sortOrder | string | – | Sort order (default: desc) |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| instances | array | yes | – |
No examples provided.
fetch-timeline Fetch Actor Timeline ~146
Fetch recent posts (the outbox) from any fediverse actor — a user or account — with cursor- and ID-based pagination. Pass a handle like 'alice@mastodon.social'.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | Pagination cursor from previous response to fetch next page |
| identifier | string | yes | Actor identifier (e.g., user@example.social) |
| limit | number | – | Number of posts to fetch (default: 20) |
| maxId | string | – | Return posts older than this post ID (pagination) |
| minId | string | – | Return posts newer than this post ID (pagination) |
| sinceId | string | – | Return posts more recent than this post ID |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
get-bookmarks Get Bookmarks ~39
Get your bookmarked posts
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Account ID |
| limit | number | – | Number of posts (default: 20) |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
get-favourites Get Favourites ~41
Get posts you have favourited
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Account ID |
| limit | number | – | Number of posts (default: 20) |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
get-home-timeline Get Home Timeline ~75
Get your personalized home timeline (posts from accounts you follow)
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Account ID |
| limit | number | – | Number of posts (default: 20) |
| maxId | string | – | Return posts older than this ID |
| sinceId | string | – | Return posts newer than this ID |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
get-instance-info Get Instance Information ~54
Get detailed information about a fediverse instance: software and version, description, registration policy, supported languages, user/post/domain counts, and contact account.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Instance domain (e.g., example.social) |
| Name | Type | Req | Description |
|---|---|---|---|
| description | string | – | – |
| domain | string | yes | – |
| registrationsOpen | boolean | – | – |
| software | string | – | – |
| title | string | – | – |
| users | number | – | – |
| version | string | – | – |
No examples provided.
get-notifications Get Notifications ~57
Get your notifications (mentions, follows, boosts, favourites)
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Account ID |
| limit | number | – | Number of notifications (default: 20) |
| types | array | – | Filter by notification types |
| Name | Type | Req | Description |
|---|---|---|---|
| notifications | array | yes | – |
No examples provided.
get-post-thread Get Post Thread ~80
Fetch a post and its full conversation thread including replies and parent posts
| Name | Type | Req | Description |
|---|---|---|---|
| depth | number | – | How many levels of nested replies to fetch (default: 2) |
| maxReplies | number | – | Maximum number of replies to fetch (default: 50) |
| postUrl | string | yes | The URL of the post to fetch the thread for |
| Name | Type | Req | Description |
|---|---|---|---|
| ancestors | array | yes | – |
| post | object | yes | – |
| replies | array | yes | – |
No examples provided.
get-public-timeline Get Public Timeline ~110
Fetch an instance's public timeline. scope 'federated' (default) shows posts the instance has seen from across the fediverse; 'local' shows only posts authored on that instance.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Instance domain, e.g. mastodon.social |
| limit | number | – | Number of posts to fetch (default: 20) |
| maxId | string | – | Return results older than this ID (for pagination) |
| scope | string | – | default: federated |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
get-relationship Get Relationship ~123
Check your relationship status with another account (following, followed by, blocking, muting, etc.). Pass a single acct like 'username@instance'. To check multiple accounts, call this tool once per account.
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Your account ID |
| accountIds | – | – | Deprecated / not supported. Use 'acct' (a single username@instance string) and call this tool once per account. |
| acct | string | yes | Account to check relationship with (username@instance). If you have multiple accounts to check, call this tool once per account. |
| Name | Type | Req | Description |
|---|---|---|---|
| acct | string | yes | – |
| blocking | boolean | – | – |
| followedBy | boolean | – | – |
| following | boolean | – | – |
| muting | boolean | – | – |
| requested | boolean | – | – |
No examples provided.
get-scheduled-posts Get Scheduled Posts ~46
List your scheduled posts that haven't been published yet
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Account ID |
| limit | number | – | Number of posts (default: 20) |
| Name | Type | Req | Description |
|---|---|---|---|
| scheduledPosts | array | yes | – |
No examples provided.
get-trending-hashtags Get Trending Hashtags ~66
Get currently trending hashtags on a fediverse instance (Mastodon-compatible instances that expose a trends API).
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Instance domain (e.g., mastodon.social) |
| limit | number | – | Number of hashtags to fetch (default: 20) |
| Name | Type | Req | Description |
|---|---|---|---|
| hashtags | array | yes | – |
No examples provided.
get-trending-posts Get Trending Posts ~65
Get currently trending posts on a fediverse instance (Mastodon-compatible instances that expose a trends API).
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Instance domain (e.g., mastodon.social) |
| limit | number | – | Number of posts to fetch (default: 20) |
| Name | Type | Req | Description |
|---|---|---|---|
| hasMore | boolean | – | – |
| nextCursor | string | – | Opaque cursor for the next page, if more results |
| posts | array | yes | – |
| source | string | – | Account/actor/instance the posts came from |
No examples provided.
list-accounts List Configured Accounts ~18
List all configured authenticated accounts for write operations
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| accounts | array | yes | – |
| activeAccountId | string | – | – |
| writeEnabled | boolean | yes | – |
No examples provided.
search Search Fediverse ~86
Unified search across the fediverse - find accounts, posts, or hashtags on any instance
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | – | Instance domain to search on (default: mastodon.social) |
| limit | number | – | Number of results per type (default: 10) |
| query | string | yes | Search query |
| type | string | – | Type of content to search for (default: all) |
| Name | Type | Req | Description |
|---|---|---|---|
| accounts | array | – | – |
| hashtags | array | – | – |
| statuses | array | – | – |
No examples provided.
switch-account Switch Active Account ~39
Switch the active account used for write operations
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | yes | The account ID to switch to (use list-accounts to see IDs) |
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | – |
| active | boolean | – | – |
| instance | string | – | – |
| username | string | – | – |
| verified | boolean | – | – |
No examples provided.
verify-account Verify Account Credentials ~38
Verify that the account credentials are valid and get account information
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | The account ID to verify (defaults to active account) |
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | – |
| active | boolean | – | – |
| instance | string | – | – |
| username | string | – | – |
| verified | boolean | – | – |
No examples provided.
How do I install the io.github.cameronrye/activitypub-mcp server?
io.github.cameronrye/activitypub-mcp runs locally as an npm package, launched with npx -y activitypub-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · activitypub-mcp
claude mcp add cameronrye-activitypub-mcp -- npx -y activitypub-mcp
What is the io.github.cameronrye/activitypub-mcp server?
io.github.cameronrye/activitypub-mcp is listed in the public MCP registry as io.github.cameronrye/activitypub-mcp. Read-only-by-default MCP server: let LLMs explore the Fediverse, Mastodon, Misskey, Pleroma. This page covers its npm package (activitypub-mcp).
Is the io.github.cameronrye/activitypub-mcp server safe to use?
io.github.cameronrye/activitypub-mcp scores 97 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.cameronrye/activitypub-mcp server expose?
io.github.cameronrye/activitypub-mcp exposes 18 tools: discover-actor, discover-instances, fetch-timeline, get-post-thread, search, and 13 more. Their descriptions and schemas cost roughly 1,322 tokens of context every time the server is loaded.
Is the io.github.cameronrye/activitypub-mcp server still maintained?
io.github.cameronrye/activitypub-mcp is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.cameronrye/activitypub-mcp server under?
io.github.cameronrye/activitypub-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.