A login procedure for dirctl, the command-line client used to access the AGNTCY Directory configured in dir-mcp. It uses a browser-based sign-in and stores a token for the server to use.

Use it to sign in to the configured AGNTCY Directory and make the resulting login available to dir-mcp.

It removes the need to manually create or copy an authentication token, while checking the approved client path before login.

dirctl-auth — Skill for Claude Code by agntcy/dir-mcp

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 agntcy/dir-mcp --skill dirctl-auth

Clone the repo

git clone --depth 1 https://github.com/agntcy/dir-mcp

Made for: Claude Code.

Or install agntcy-dir, the plugin that ships this one along with the rest of its 4 skills, 1 MCP server.

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/agntcy/dir-mcp/dirctl-auth/github.svg)](https://agentmods.dev/skills/agntcy/dir-mcp/dirctl-auth)

Your own site

<a href="https://agentmods.dev/skills/agntcy/dir-mcp/dirctl-auth"><img src="https://agentmods.dev/badge/skills/agntcy/dir-mcp/dirctl-auth/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/agntcy/dir-mcp/dirctl-auth"><img src="https://agentmods.dev/badge/skills/agntcy/dir-mcp/dirctl-auth.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,052 The whole file, excluding the scripts and references it only reads on demand.

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

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	$0.00092	$0.02052
Opus 5.5	$0.00037	$0.00821
Sonnet 5.5	$0.00018	$0.00410
Haiku 4.5	$0.00009	$0.00205

Measured 1mo ago against content hash 30a502e388fb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

dirctl-auth scanned grade B 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 1mo ago.

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.

Reads MCP configurationmediumAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

cat .mcp.json

dir-mcp-plugins/claude/skills/dirctl-auth/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authenticate with dirctl

Use this skill to log in to the AGNTCY Directory instance that dir-mcp is configured to use. It runs dirctl auth login which opens a browser-based PKCE flow and caches the resulting token for the MCP server to pick up automatically.

1. Invoke dirctl through the dir-mcp npm package — never system-wide

Never run a bare dirctl, which dirctl, or search the filesystem/PATH for the binary. The @agntcy/dir-mcp npm package — the same one .mcp.json runs via npx -y @agntcy/dir-mcp — exposes the platform-specific dirctl binary it already downloaded as a second bin entry. Invoke it through npx so you always get that binary, not a possibly-different one that happens to be installed elsewhere on the machine:

npx -y --package=@agntcy/dir-mcp dirctl <subcommand and flags>

Run this exact command (with subcommand/flags appended) in place of every dirctl invocation below — treat $DIRCTL in this doc's prose as shorthand for npx -y --package=@agntcy/dir-mcp dirctl, not as a shell variable to actually set. Do not assign it with VAR="..." first: that syntax is bash/zsh-only and fails outright under fish (fish: Unsupported use of '='), and you cannot assume which shell the Bash tool is running. Always spell out the full npx ... command in each call. Internally this wrapper (bin/dirctl.js in the package):

resolves the actual binary from DIRECTORY_DIRCTL_PATH if that's set in the environment, otherwise from its own package bin/ directory — it never scans PATH or the rest of the filesystem;
chmods the binary executable if needed before spawning it;
passes the process environment straight through, so any DIRECTORY_CLIENT_* env vars set in .mcp.json's env block reach dirctl too, where they act as overrides on top of whatever context dirctl's own config (~/.config/dirctl/config.yaml) has selected.

If dirctl version (or any subcommand) fails with "dirctl binary not found", the platform download at install time failed — tell the user to re-run npx -y @agntcy/dir-mcp once, or reinstall the plugin, to restore it. Do not fall back to a system dirctl even if one is present.

Read the full file on GitHub · 109 lines

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.

1mo ago Changed · -8 lines scan A → B 30a502e388fb
1mo ago Changed · +53 tokens per session a9782d988b81
2mo ago First seen · 117 lines · 39 tokens per session scan A a742ee0be75f

Subscribe to this mod's changes

dirctl-auth is a skill published in the GitHub repository agntcy/dir-mcp (4 stars, last pushed 3d ago), licensed Apache-2.0. It adds 92 tokens to every session and 2,052 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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dirctl-auth