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SuperSkill Registry

REMOTE · SUPERSKILL.SH · SCANNED SEP 24

Find, inspect and install reviewed reusable AI-agent capabilities from superskill.sh.

Available components

remote · superskill.sh 79
0 this week 79 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security63
Transport & Reachability100
Schema Quality & AI Usability76
  • AI-judged instruction clarity (good).Pass
  • Tool/resource definitions use about 757 tokens (~63/item across 12 items; 12 tools + 0 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 Coverage82
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 36% of tool parameters carry a description.Partial
  • 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
  • All 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
  • An AI judge read all 12 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
Install

How do I install the SuperSkill Registry MCP server?

SuperSkill Registry is a hosted endpoint at https://superskill.sh/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · superskill.sh

# add to Claude Code
claude mcp add --transport http com-onlyharness-registry 'https://superskill.sh/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "com-onlyharness-registry": {
      "url": "https://superskill.sh/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "com-onlyharness-registry": {
      "type": "http",
      "url": "https://superskill.sh/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.com-onlyharness-registry]
url = "https://superskill.sh/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-onlyharness-registry": {
      "type": "remote",
      "url": "https://superskill.sh/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add com-onlyharness-registry --url 'https://superskill.sh/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  com-onlyharness-registry:
    url: "https://superskill.sh/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "com-onlyharness-registry": {
      "Transport": "http",
      "Url": "https://superskill.sh/mcp"
    }
  }
}
# add to Vellum
assistant mcp add com-onlyharness-registry -t streamable-http -u 'https://superskill.sh/mcp'
// mcp.json
{
  "mcpServers": {
    "com-onlyharness-registry": {
      "type": "http",
      "url": "https://superskill.sh/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

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.

  • 26 Aug 26 79
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 11 Aug 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 31 Jul 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 28 Jul 26 0
    • Stability: unverified → 0.03 ▲ functional
  • 27 Jul 26 0

    First indexed and scored.

Diagnostics

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 24 Sept 2026 · Probed https://superskill.sh/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=superskill.sh CN=YE1,O=Let's Encrypt,C=US 9 Sept 2026 8 Dec 2026 ECDSA 256 ECDSA-SHA384 519f362c8c28cb0e9b6336388e66776ce71
SANs: superskill.sh
CN=YE1,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 5ddd70dd31f801c85c186a7a04b80afe
CN=Root YE,O=ISRG,C=US (CA) CN=ISRG Root X2,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 ECDSA-SHA384 872165fc34b6e5fba8add5b3705fb53a
CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 SHA256-RSA 6c8f1dc727c7117f7baf853ac980f9cd

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of superskill.sh. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
sh. present 55297 8 Verified
superskill.sh. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200
Header Value
strict-transport-security max-age=31536000; includeSubDomains; preload
x-content-type-options nosniff
referrer-policy strict-origin-when-cross-origin

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://superskill.sh/mcp Verified 200
http (plaintext) http://superskill.sh/mcp HTTPS enforced 308 https://superskill.sh/mcp
MCP tools · 12 exposed · ~757 tokens

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 →

Tool Tokens
fetch ~41

Fetch the complete public catalog record for an exact resource id returned by search, including a canonical citation URL.

NameTypeReqDescription
idstringyesExact resource id returned by search.
NameTypeReqDescription
idstringyes–
metadataobject––
textstringyes–
titlestringyes–
urlstringyes–

No examples provided.

harness_detail ~46

Return manifest, trust signals, example and file list for one harness.

NameTypeReqDescription
namestringyesHarness slug, for example deep-market-researcher.
ownerstring––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

publish_markdown_to_harness ~43

Convert markdown into an unverified harness scaffold. Requires a SuperSkill Bearer token.

NameTypeReqDescription
markdownstringyes–
namestring––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

publish_resource_package ~127

Publish an immutable canonical hosted package release. Requires a confirmed-user Bearer with active superskill:managed scope, semantic version and idempotency key. Returns unreviewed trust; never grants a Verified badge.

NameTypeReqDescription
filesarrayyes–
idempotencyKeystringyes–
namestring––
resourceTypestring––
sourceUrlstring––
summarystring––
tagsarray––
titlestring––
versionstringyes–
worksWitharray––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

pull_harness ~51

Return archive files for a harness. Paid harnesses return payment requirements unless the Bearer token is entitled.

NameTypeReqDescription
namestringyes–
ownerstring––
versionstring––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

pull_instructions ~37

Return CLI and HTTP commands for pulling a harness into a local workspace.

NameTypeReqDescription
namestringyes–
ownerstring––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

resource_detail ~70

Return provenance, trust, popularity and actions for one mixed resource. Pass version to bind a hosted immutable release; latest is never substituted for an explicit version.

NameTypeReqDescription
idstringyesExact mixed resource identifier.
versionstring–Optional immutable hosted release version. When supplied, latest is never used.
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

resource_use_instructions ~80

Return the best safe next action for a mixed resource. Pass version to bind an immutable hosted release. Hosted skills expose explicit-consent exact native client install commands; upstream-only resources stay open-only.

NameTypeReqDescription
idstringyesExact mixed resource identifier.
versionstring–Optional immutable hosted release version. When supplied, latest is never used.
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

search ~42

Search public agent resources. Returns exact resource ids and canonical browser-openable URLs for citation.

NameTypeReqDescription
querystringyesNatural-language or keyword query for public SuperSkill resources.
NameTypeReqDescription
resultsarrayyes–

No examples provided.

search_docs ~33

Search /llms.txt and agent guidance for API, CLI, MCP and safety instructions.

NameTypeReqDescription
querystring––
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

search_harnesses ~53

Search the SuperSkill registry by task, job, title, summary or tag.

NameTypeReqDescription
limitinteger––
querystring–Search terms such as market research, support triage or finance safety.
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

search_resources ~134

Search mixed source-aware resources: harnesses, skills, plugins, workflows, MCP servers, configs, guides, runtimes and directories.

NameTypeReqDescription
limitinteger––
qstring–Alias for query, matching the HTTP /resources?q= contract.
querystring–Search terms such as superpowers, MCP browser, workflow or Claude skill.
typestring–Optional resource type filter, for example skill, plugin, workflow, mcp_server or harness.
worksWithstring–Optional compatibility filter: claude-code, codex, cursor, mcp, cli or github.
NameTypeReqDescription
codestringyes–
okbooleanyes–
statusintegeryes–

No examples provided.

Common questions

What is the SuperSkill Registry MCP server?

SuperSkill Registry is an MCP server listed in the public MCP registry as com.onlyharness/registry. Find, inspect and install reviewed reusable AI-agent capabilities from superskill.sh. This page covers its hosted endpoint (https://superskill.sh/mcp).

Is the SuperSkill Registry MCP server safe to use?

SuperSkill Registry scores 79 out of 100 on VerifyMCP. 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 SuperSkill Registry MCP server expose?

SuperSkill Registry exposes 12 tools: search, fetch, search_harnesses, harness_detail, search_resources, and 7 more. Their descriptions and schemas cost roughly 757 tokens of context every time the server is loaded.

Does the SuperSkill Registry MCP server require authentication?

No. We connected to SuperSkill Registry without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the SuperSkill Registry MCP server still maintained?

SuperSkill Registry is still listed as active in the MCP registry. We last reached this channel on 24 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.