gum-auth-probe

gum-auth-probe is a command for coding agents from ehmo/gum. It costs 0 tokens per session (236 once invoked), scanned A, original, MIT.

A reference page for the `gum auth probe` command, which obtains an authentication token for requested permissions and prints metadata that does not contain the token secret.

In plain words
What is it for?
Use it to check available flags when probing Gmail or other configured authentication scopes, choosing an OAuth or application-default strategy, or selecting JSON or text logs.
Why use it?
It shows the command's syntax, default permission, authentication strategies, output formats, logging options, and profile setting.

Command

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.

agentmods
npx agentmods add commands/ehmo/gum/gum-auth-probe
Clone the repo
git clone --depth 1 https://github.com/ehmo/gum

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.

agentmods badge for gum-auth-probe

README.md
[![agentmods](https://agentmods.dev/badge/commands/ehmo/gum/gum-auth-probe.svg)](https://agentmods.dev/commands/ehmo/gum/gum-auth-probe)
Your own site
<a href="https://agentmods.dev/commands/ehmo/gum/gum-auth-probe"><img src="https://agentmods.dev/badge/commands/ehmo/gum/gum-auth-probe.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 236 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00236
Opus 5 $0.00000 $0.00118
Sonnet 5 $0.00000 $0.00047
Haiku 4.5 $0.00000 $0.00024

Measured 5d ago against content hash dffd2797608d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gum-auth-probe scanned grade A with 0 findings 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 5d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/commands/gum-auth-probe.md · 31 lines

What it actually says

gum auth probe

Generated from gum schema --json. Do not edit this page by hand; run make docs-commands.

Acquire a token for --scopes and print non-secret metadata

Usage

gum auth probe [flags]

Parent

Flags

Flag Type Default Help
--scopes stringSlice [gmail.readonly] Scopes to acquire
--strategy string auto Auth strategy to probe: auto, byo_oauth, or adc
--log-format string json Log format: json|text
--log-level string info Log level: debug|info|warn|error (overrides GUM_LOG_LEVEL)
--profile string default Profile name to read/write config under

See also

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.

  1. 5d ago First seen · 31 lines · 0 tokens per session scan A dffd2797608d

Subscribe to this mod's changes

gum-auth-probe is a command published in the GitHub repository ehmo/gum (32 stars, last pushed 28d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 236 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.