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.
npx skills add chrischall/signupgenius-mcp --skill signupgenius-apigit clone --depth 1 https://github.com/chrischall/signupgenius-mcpWrote 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/chrischall/signupgenius-mcp/signupgenius-api)<a href="https://agentmods.dev/skills/chrischall/signupgenius-mcp/signupgenius-api"><img src="https://agentmods.dev/badge/skills/chrischall/signupgenius-mcp/signupgenius-api/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.
<a href="https://agentmods.dev/skills/chrischall/signupgenius-mcp/signupgenius-api"><img src="https://agentmods.dev/badge/skills/chrischall/signupgenius-mcp/signupgenius-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00096 | $0.01478 |
| Opus 5 | $0.00048 | $0.00739 |
| Sonnet 5 | $0.00019 | $0.00296 |
| Haiku 4.5 | $0.00010 | $0.00148 |
Grade A, and why
signupgenius-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
description: "Access SignUpGenius (sign-ups, groups, RSVPs) from a shell with curl instead of running the signupgenius-mcp server — server-side email/password login to a JWT + cfid/cftoken cookies, then curl the v3 API a How it starts
The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SignUpGenius via curl (no MCP)
SignUpGenius's session mode is a classic ColdFusion login: POST email+password
to the login form, get back a accessToken JWT cookie plus cfid/cftoken
session cookies. No browser or extension needed — everything here is a plain
curl call. This is the same auth path signupgenius-mcp uses in session
mode (src/auth-session-login.ts); its fetchproxy path (lifting the same
cookies out of a signed-in browser tab) is only a fallback for when you
don't want to put a password in .env — this skill always logs in directly.
One-time setup
export SIGNUPGENIUS_EMAIL="[email protected]"
export SIGNUPGENIUS_PASSWORD="..."
# or: export SIGNUPGENIUS_PASSWORD="$(op read 'op://Private/SignUpGenius/password')"
SSO accounts (Google/Apple/Facebook/Microsoft) and 2FA-enabled accounts can't use this flow — same limitation as the MCP's session mode.
Log in: get the JWT + cookies
COOKIEJAR=$(mktemp)
CSRF=$(curl -s -c "$COOKIEJAR" https://www.signupgenius.com/login \
| grep -oE 'name="csrfToken"[[:space:]]+value="[^"]+"' \
| sed -E 's/.*value="([^"]+)".*/\1/')
curl -s -D /tmp/sug-login-headers.txt -o /dev/null \
-b "$COOKIEJAR" -c "$COOKIEJAR" \
-A 'Mozilla/5.0 (Macintosh; Intel Mac OS X 14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0 Safari/537.36' \
-X POST 'https://www.signupgenius.com/index.cfm?go=c.Login' \
--data-urlencode "csrfToken=$CSRF" \
--data-urlencode "loginemail=$SIGNUPGENIUS_EMAIL" \
--data-urlencode "pword=$SIGNUPGENIUS_PASSWORD" \
--data-urlencode "successpage=c.jump&jump=/index.cfm?go=c.MyAccount" \
--data-urlencode "failpage=c.Register" \
--data-urlencode "ScreenWidth=2000" \
--data-urlencode "ScreenHeight=1200" \
--data-urlencode "formaction=1" \
--data-urlencode "formName=loginform" \
--data-urlencode "refererUrl="
# Bad credentials 302 to c.Register instead of setting accessToken — check both:
grep -q 'c.Register' /tmp/sug-login-headers.txt && echo "LOGIN FAILED (bad credentials)" >&2
ACCESS_TOKEN=$(awk -F'\t' '$6=="accessToken"{print $7}' "$COOKIEJAR")
CFID=$(awk -F'\t' '$6=="cfid"{print $7}' "$COOKIEJAR")
CFTOKEN=$(awk -F'\t' '$6=="cftoken"{print $7}' "$COOKIEJAR")
[ -z "$ACCESS_TOKEN" ] && echo "LOGIN FAILED (no accessToken cookie set)" >&2
COOKIE_HEADER="accessToken=${ACCESS_TOKEN}; cfid=${CFID}; cftoken=${CFTOKEN}"
What ships with it
1 file 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.
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 · 125 lines · 96 tokens per session scan A 483b78cde490
signupgenius-api is a skill published in the GitHub repository chrischall/signupgenius-mcp (0 stars, last pushed yesterday), licensed MIT. It adds 96 tokens to every session and 1,478 once invoked, about $0.0005 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 2026-08-31.
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