io.github.chrischall/signupgenius-mcp
NPM · SIGNUPGENIUS-MCP · SCANNED SEP 20
SignUpGenius for Claude — sign-ups, slots, groups, and RSVPs. Free accounts or Pro API key.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 0 of 9 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to chrischall/signupgenius-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability80
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 2051 tokens (~102/item across 20 items; 20 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management90
- Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage90
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 71% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 20 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
How do I install the io.github.chrischall/signupgenius-mcp server?
io.github.chrischall/signupgenius-mcp runs locally as an npm package, launched with npx -y signupgenius-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · signupgenius-mcp
claude mcp add chrischall-signupgenius-mcp -- npx -y signupgenius-mcp
{
"mcpServers": {
"chrischall-signupgenius-mcp": {
"command": "npx",
"args": [
"-y",
"signupgenius-mcp"
]
}
}
} {
"servers": {
"chrischall-signupgenius-mcp": {
"command": "npx",
"args": [
"-y",
"signupgenius-mcp"
]
}
}
} codex mcp add chrischall-signupgenius-mcp -- npx -y signupgenius-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"chrischall-signupgenius-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"signupgenius-mcp"
],
"enabled": true
}
}
} openclaw mcp add chrischall-signupgenius-mcp --command npx --arg -y --arg signupgenius-mcp
mcp_servers:
chrischall-signupgenius-mcp:
command: "npx"
args: ["-y", "signupgenius-mcp"] {
"McpServers": {
"chrischall-signupgenius-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"signupgenius-mcp"
]
}
}
} assistant mcp add chrischall-signupgenius-mcp -t stdio -c npx -a -y signupgenius-mcp
{
"mcpServers": {
"chrischall-signupgenius-mcp": {
"command": "npx",
"args": [
"-y",
"signupgenius-mcp"
]
}
}
} 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.
- 20 Sept 26 +1
- MCP protocol: Implements a current MCP spec version (2026-07-28). functional
- Package version: 2.0.0 → 2.1.0 functional
- 18 Sept 26 +1
- Stability: 0.80 → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- Dependency health: 0.87 → 1.00 ▲ functional
- Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
- Package version: 1.8.4 → 2.0.0 functional
- Package version: 1.3.0 → 2.0.0 functional
- 17 Sept 26 −2
- Stability: pass → 0.80 functional
- 16 Sept 26 +15
- Malware scan: unverified → pass ▲ security
- Stability: 0.97 → pass security
- 15 Sept 26 +11
- Malware scan: unverified → pass ▲ security
- Known CVEs: unverified → pass ▲ security
- Dependency health: unverified → 0.87 ▲ functional
- Dependency health: unverified → 0.86 ▲ functional
- Package version: 1.8.3 → 1.8.4 functional
- 14 Sept 26 −25
- Known CVEs: pass → unverified ▼ security
- Stability: 0.90 → unverified ▼ security
- Malware scan: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Dependency health: 0.86 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
- Package version: 1.8.1 → 1.8.3 functional
- Package version: 1.8.1 → 1.8.2 functional
- Package version: 1.3.0 → 1.8.1 functional
- 12 Sept 26 +16
- Malware scan: unverified → pass ▲ security
- 10 Sept 26 −18
- Malware scan: pass → unverified ▼ security
- Stability: pass → 0.80 functional
- Package version: 1.8.0 → 1.8.1 functional
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 20 Sept 2026 · Analysed npm/signupgenius-mcp@2.1.0
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | chrischall/signupgenius-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/chrischall/signupgenius-mcp/.github/workflows/release-please.yml@refs/heads/main |
| Rekor log index | 2893922786 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:5393e9f049b2df6292014ca22dd293b92487c35ea3f824e9ec97265c0af90d9b3d12b708b300f75fb6fc9bd765574e63f5d9b371fd269c234e4f1379c |
Background: How many MCP packages publish verified provenance →
Dependencies 9 packages
| Packages resolved | 9 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
signupgenius_add_group_member ~82
Add a member to a SignUpGenius group by email address. First/last name are optional. Writes data — confirm with the user before invoking.
| Name | Type | Req | Description |
|---|---|---|---|
| emailaddress | string | yes | Email of the member to add to the group. |
| firstname | string | – | – |
| groupId | integer | yes | – |
| lastname | string | – | – |
No output schema declared.
No examples provided.
signupgenius_claim_slot ~264
Claim (sign up for) a slot on a slot-based SignUpGenius sheet. Two-step by design: call WITHOUT `confirm` first to get a preview of the slot, identity and payload, show it to the user, then call again with confirm:true. WRITES DATA — never call with confirm:true unless the user has explicitly approved this specific slot. For Yes/No/Maybe headcount sheets use signupgenius_rsvp instead.
| Name | Type | Req | Description |
|---|---|---|---|
| comment | string | – | Optional comment shown to the organizer. |
| confirm | boolean | – | Must be true to actually submit. Omit (or false) to get a dry-run preview of exactly what would be sent, including the identity and the slot. |
| customFields | array | – | Answers to the sheet's required custom questions. Read the required set from signupgenius_get_public_signup.customFields — omitting a required field makes the server reject the claim. |
| string | yes | – | |
| firstname | string | yes | – |
| lastname | string | yes | – |
| quantity | integer | – | Spots to take. Default 1. |
| slotitemid | integer | yes | The slot to claim. Get this from signupgenius_list_slots. |
| url | string | yes | Sign-up URL or slug. |
No output schema declared.
No examples provided.
signupgenius_get_group_member ~64
Get detailed info for a group member (address, phone, email) when the member has provided it via a sign-up.
| Name | Type | Req | Description |
|---|---|---|---|
| groupId | integer | yes | – |
| memberId | integer | yes | communitymemberid returned by signupgenius_list_group_members. |
No output schema declared.
No examples provided.
signupgenius_get_profile ~61
Get the SignUpGenius profile of the authenticated user (name, email, member ID, subscription level). Useful as a first call to confirm credentials. Key mode hits /v2/k/user/profile; session mode hits /v3/member/profile.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_get_public_signup ~192
Look up a SignUpGenius sign-up by its public URL or slug (e.g. `https://www.signupgenius.com/go/<urlid>-<signupid>-<vanity>`). Returns the real sheet metadata: title, description, organization, category, creator + contact email, timezone, created/modified dates, whether it is an RSVP or slot-based sheet, and which custom fields a participant must supply to sign up. Requires NO SignUpGenius auth and works for sheets the user did not create. Use signupgenius_list_slots for the actual dates/times and availability — this tool returns metadata only.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Either a full SignUpGenius sign-up URL (e.g. https://www.signupgenius.com/go/<slug>) or just the slug. The slug looks like `<hex>-<signupid>[-<vanity>]`. |
No output schema declared.
No examples provided.
signupgenius_healthcheck Verify credentials and upstream reachability ~105
Resolves the credential the way real tools do, then makes one authenticated request to api.signupgenius.com. Reports which source supplied the credential, whether api.signupgenius.com accepted it, the round-trip time, and a plain-English hint distinguishing 'no credential' from 'credential rejected' from 'a api.signupgenius.com-side problem'. Read-only; never returns the credential itself. Call this when a real tool fails and you want to know which hop broke.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_legacy_get_my_signups ~64
Session mode only. Returns the same sign-up listing the SignUpGenius wizard sees (via /SUGboxAPI.cfm?go=t.getMySignups). Use when you want fuller data than signupgenius_list_created_* provides.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_created_active ~47
List sign-ups created by the authenticated user. In session mode this returns the full list (active + expired) — filter on enddate client-side if you need only active.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_created_all ~26
List ALL sign-ups created by the authenticated user (active and expired).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_created_expired ~40
Alias of signupgenius_list_created_active in session mode (v3 returns active + expired together). Filter on enddate client-side.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_group_members ~56
List members of a SignUpGenius group (basic info: name, email, memberid).
| Name | Type | Req | Description |
|---|---|---|---|
| groupId | integer | yes | Group ID returned by signupgenius_list_groups. |
| sort | string | – | – |
No output schema declared.
No examples provided.
signupgenius_list_groups ~44
List groups created by the authenticated user. Returns groupid, title, and member count for each group.
| Name | Type | Req | Description |
|---|---|---|---|
| sort | string | – | Sort order for group results. |
No output schema declared.
No examples provided.
signupgenius_list_invited ~22
List sign-ups the user has been invited to.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_signedupfor ~24
List sign-ups the user has personally signed up for.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signupgenius_list_slots ~226
List every SLOT on a SignUpGenius sign-up — date, day of week, start/end time, title, location, capacity, how many spots are filled vs still available, and who has already signed up (with the quantity each entry consumes). Accepts a sign-up URL, slug, or numeric id. Requires NO auth and works for sheets the user did NOT create, which is exactly the case the Pro signupgenius_report_* tools cannot serve (they are key-only AND owner-scoped). This is the right tool for "what is still open?".
| Name | Type | Req | Description |
|---|---|---|---|
| includeParticipants | boolean | – | Fetch the name + quantity of everyone already signed up (default true). Costs one extra request per slot row; set false for a fast availability-only view. |
| onlyAvailable | boolean | – | Return only slots that still have room. Default false (return all). |
| url | string | yes | A SignUpGenius sign-up URL, its slug (`<urlid>-<signupid>[-<vanity>]`), or just the numeric sign-up id. |
No output schema declared.
No examples provided.
signupgenius_release_slot ~196
Withdraw (give up) a slot the user previously signed up for. Call WITHOUT `confirm` first to preview which entry would be removed, then again with confirm:true. WRITES DATA — this removes a real sign-up.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to actually withdraw. |
| itemMemberId | integer | yes | The sign-up entry to withdraw — `participants[].item_member_id` from signupgenius_list_slots. This is the wizard's `imid`. |
| memberId | integer | – | Optional. The signed-in member id is resolved automatically; supplying a DIFFERENT one is rejected, because this tool only withdraws the current user's own sign-up. |
| slotitemid | integer | yes | The slot the entry sits in (`slotitemid` from the same signupgenius_list_slots row). Used to verify afterwards that the entry actually disappeared. |
| url | string | yes | Sign-up URL or slug. |
No output schema declared.
No examples provided.
signupgenius_report_all ~110
Full report for a sign-up: every slot plus the participant who claimed it (with custom-question answers when present). Requires SIGNUPGENIUS_USER_KEY (Pro subscription) — session mode is not supported for reports — AND only covers sheets the key-holder created. For slot dates, times and availability on ANY sign-up (including sheets the user did not create) prefer signupgenius_list_slots, which needs no auth.
| Name | Type | Req | Description |
|---|---|---|---|
| signupId | integer | yes | Sign-up ID (signupid). |
No output schema declared.
No examples provided.
signupgenius_report_available ~102
Report for a sign-up restricted to slots that are still open/empty. Requires SIGNUPGENIUS_USER_KEY (Pro subscription) — session mode is not supported for reports — AND only covers sheets the key-holder created. For slot dates, times and availability on ANY sign-up (including sheets the user did not create) prefer signupgenius_list_slots, which needs no auth.
| Name | Type | Req | Description |
|---|---|---|---|
| signupId | integer | yes | Sign-up ID (signupid). |
No output schema declared.
No examples provided.
signupgenius_report_filled ~102
Report for a sign-up restricted to slots that have already been filled. Requires SIGNUPGENIUS_USER_KEY (Pro subscription) — session mode is not supported for reports — AND only covers sheets the key-holder created. For slot dates, times and availability on ANY sign-up (including sheets the user did not create) prefer signupgenius_list_slots, which needs no auth.
| Name | Type | Req | Description |
|---|---|---|---|
| signupId | integer | yes | Sign-up ID (signupid). |
No output schema declared.
No examples provided.
signupgenius_rsvp ~224
RSVP to a SignUpGenius sign-up (the Yes/No/Maybe-style sheets, including invitations from family/friends). Walks the PreProcessSignup → getSignupInfo → processSignUpFormHandler flow under the hood. Writes data — confirm with the user before invoking. Slot-based sign-ups (e.g. "claim the 3pm slot") are NOT handled here — use signupgenius_claim_slot for those.
| Name | Type | Req | Description |
|---|---|---|---|
| adults | integer | – | Adult guest count. Defaults to 1 for yes/maybe, 0 for no. |
| children | integer | – | Child guest count. Defaults to 0. |
| comment | string | – | Optional comment shown to the sign-up owner. |
| string | yes | – | |
| firstname | string | yes | – |
| lastname | string | yes | – |
| response | string | yes | RSVP response. Maps to the wizard's Yes / No / Maybe buttons. |
| url | string | yes | SignUpGenius sign-up URL (https://www.signupgenius.com/go/<slug>) or just the slug. |
No output schema declared.
No examples provided.
What is the io.github.chrischall/signupgenius-mcp server?
io.github.chrischall/signupgenius-mcp is listed in the public MCP registry as io.github.chrischall/signupgenius-mcp. SignUpGenius for Claude, sign-ups, slots, groups, and RSVPs. Free accounts or Pro API key. This page covers its npm package (signupgenius-mcp).
Is the io.github.chrischall/signupgenius-mcp server safe to use?
io.github.chrischall/signupgenius-mcp scores 94 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 io.github.chrischall/signupgenius-mcp server expose?
io.github.chrischall/signupgenius-mcp exposes 20 tools: signupgenius_get_profile, signupgenius_healthcheck, signupgenius_list_groups, signupgenius_list_group_members, signupgenius_get_group_member, and 15 more. Their descriptions and schemas cost roughly 2,051 tokens of context every time the server is loaded.
Is the io.github.chrischall/signupgenius-mcp server still maintained?
io.github.chrischall/signupgenius-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.chrischall/signupgenius-mcp server under?
io.github.chrischall/signupgenius-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.