What is fediverse-crud?

A tool for managing posts, likes, boosts, follows, and other actions across Fediverse servers. The Fediverse is a network of independently operated social-media servers that communicate using ActivityPub.

Use it to publish or delete posts, like or boost content, follow users, read inboxes and outboxes, and test delivery between servers.

It handles the discovery, login, data-format, and server-delivery steps that make cross-server social actions difficult to perform manually.

fediverse-crud — Skill for Claude Code and Codex by OpenLinkSoftware

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add OpenLinkSoftware/ai-agent-skills --skill fediverse-crud

Clone the repo

git clone --depth 1 https://github.com/OpenLinkSoftware/ai-agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/fediverse-crud/github.svg)](https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/fediverse-crud)

Your own site

<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/fediverse-crud"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/fediverse-crud/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/fediverse-crud"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/fediverse-crud.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,371 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Data Exfiltration · line 93
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00051	$0.01371
Opus 5	$0.00026	$0.00685
Sonnet 5	$0.00010	$0.00274
Haiku 4.5	$0.00005	$0.00137

Measured 10d ago against content hash 952ce4c88866, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

fediverse-crud scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/test-fediverse.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sL -H "Accept: application/activity+json" "{actor_uri}"

fediverse-crud/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fediverse CRUD

Create, read, and manage ActivityPub activities on any Fediverse server.

Triggers

"post a note/toot/status" — create a Note
"like/boost/favourite" — Like or Announce an object
"follow/unfollow @user" — Follow or Undo-Follow
"delete my post/activity" — Delete your own activity
"read/show my inbox/outbox" — GET and paginate collections
"send an ActivityPub activity" — any of the above
"test the fediverse" — run the test harness
"remote delivery" — verify server-to-server fan-out

Workflow

Step 1: Elicit server and identity

Prompt the user for:

Variable	Prompt	Example
`INSTANCE`	"Fediverse instance hostname"	`localhost` or `fediverse.demo.openlinksw.com`
`USER_HANDLE`	"Your handle"	`demo`
`SECOND_USER`	"Target handle (for Follow/delivery)"	`kidehen`
`SCOPES`	"OAuth scopes"	`read write follow push`

Step 2: Resolve actor

WebFinger: Discover the WebFinger endpoint from https://{instance}/.well-known/host-meta.json (lrdd link template)
Query: WebFinger acct:{handle}@{instance} with Accept: application/jrd+json
Extract: Pull the actor URI from the self link with type: application/activity+json

Step 3: Fetch actor document

curl -sL -H "Accept: application/activity+json" "{actor_uri}"

Parse the response to extract:

inbox
outbox
followers
following
endpoints.sharedInbox
endpoints.oauthAuthorizationEndpoint
endpoints.oauthTokenEndpoint

Step 4: Authenticate

Delegated to the existing OAuth Authorization Code flow:

Reference: agent-rdf-memory/howto/uriburner-oauth-authcode-flow.ttl
Implementation: oa2.py (in this repo's root) or equivalent
OIDC discovery: {instance}/.well-known/openid-configuration
Scopes at runtime: elicit from user (read write follow push)

Do not create new auth scripts. Use the existing pattern.

Step 5: Elicit operation parameters from the user

Read the full file on GitHub · 135 lines

Files

What ships with it

20 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago First seen · 135 lines · 51 tokens per session scan A 952ce4c88866

Subscribe to this mod's changes

fediverse-crud is a skill published in the GitHub repository OpenLinkSoftware/ai-agent-skills (38 stars, last pushed yesterday), licensed MIT. It adds 51 tokens to every session and 1,371 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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fediverse-crud