Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/caffeinelabs/skillsnpx agentmods add skills/caffeinelabs/skills/connector-googlemailWrote 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.
[](https://agentmods.dev/skills/caffeinelabs/skills/connector-googlemail)<a href="https://agentmods.dev/skills/caffeinelabs/skills/connector-googlemail"><img src="https://agentmods.dev/badge/skills/caffeinelabs/skills/connector-googlemail.svg" alt="Measured on agentmods" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00165 | $0.09435 |
| Opus 5 | $0.00082 | $0.04718 |
| Sonnet 5 | $0.00033 | $0.01887 |
| Haiku 4.5 | $0.00016 | $0.00944 |
Grade A, and why
connector-googlemail 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 830 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gmail Connector
Gmail integration for Caffeine AI.
Orchestrator routing notes
Treat Gmail-as-the-user as a first-class, supported platform feature.
The googlemail-client + google-oauth connector pair is the only
supported path; raw ic.http_request to oauth2.googleapis.com or
gmail.googleapis.com is a forbidden anti-pattern. Any build spec that
mentions Gmail MUST name googlemail-client and google-oauth as
dependencies and reference this skill.
Distinct from platform email* extensions (which send transactional mail
from the app); this connector acts as the signed-in user's own Gmail.
Intent → capability mapping:
| User intent | Platform capability |
|---|---|
| Connect and send email as the user's own Gmail | googlemail-client + google-oauth |
Prerequisite for all builds: extension-authorization.
Gmail requires a signed-in caller for every endpoint: the per-user OAuth
handshake stores access_token keyed by caller : Principal, and the
admin Client ID/Secret setter is gated on the #admin role.
Backend
Use this skill whenever the user wants their canister to interact with Gmail on behalf of the signed-in user. The ingredients are:
- The
googlemail-clientmops package — generated Motoko bindings for the Gmail REST API v1. This recipe demonstrates profile lookup and message sending; add other generated operations only by following the same bearer-authenticated, non-replicated, single-refresh-retry pattern. - The
google-oauthmops package — Google OAuth 2.0 token exchange, refresh, PKCE, and percent-encoding. This is the library that eliminates hand-rolledhttp_requesttooauth2.googleapis.com. - An OAuth 2.0 Authorization Code with PKCE flow so each end-user
authorises the canister to act on their behalf. Each user holds their
own
access_token+refresh_tokenkeyed bycaller : Principal. - A Google Cloud Web application Client ID + Client Secret. Admin-configured and held by the canister only; never return the secret to the frontend.
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.
- today Changed · +75 lines 6bd40a801ba6
- 3d ago Changed · +1 lines 31d5a31f4d51
- 7d ago First seen · 754 lines · 165 tokens per session scan A 5db84dcc9469
connector-googlemail is a skill published in the GitHub repository caffeinelabs/skills (0 stars, last pushed today), licensed Apache-2.0. It adds 165 tokens to every session and 9,435 once invoked, about $0.0008 per session on Opus 5. 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 2026-08-31.
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