Corsizio MCP by usefulapi
REMOTE · CORSIZIO.USEFULAPI.IO
Read Corsizio events, attendees and registrations, including payment status. Read-only.
Available components
Last scanned (1 hour ago)
Scores higher than 46% of remote servers
Reachable. Last reached 25 Oct 2026.
Category Project Management
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security78
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token. View diagnostics → Pass
- HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability0
- Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability76
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1424 tokens (~237/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.
- 25 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- Server version: 1.2.0 → 1.2.3 functional
- 24 Oct 26 61
First indexed and scored.
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 25 Oct 2026 · Probed https://corsizio.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 13 Sept 2026 | 12 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d9be3287b0fde9630e825ba1f79bff3f |
| SANs: usefulapi.io, *.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of corsizio.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690, 57355 | 8, 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 302 |
WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://corsizio.usefulapi.io/.well-known/oauth-protected-resource/mcp"
Bearer realm="OAuth", resource_metadata="https://corsizio.usefulapi.io/.well-known/oauth-protected-resource/mcp"Protected resource metadata
| Document | https://corsizio.usefulapi.io/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://corsizio.usefulapi.io/mcp |
| Authorisation server | https://corsizio.usefulapi.io |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://corsizio.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/corsizio/ |
| http (plaintext) | http://corsizio.usefulapi.io/mcp | Inconclusive | 302 | http://corsizio.usefulapi.io/mcp |
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 →
corsizio_get_account Get account details ~72
Get the Corsizio account behind the API key: name, alias, time zone, currency, site URL, contact, and the configured locations, categories, age groups, genders, levels and price ranges (their ids are the filters for corsizio_list_events). Good first call. API: GET /account.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
corsizio_get_attendee Get attendee details ~122
Get one attendee registration in full: contact data, registration answers, internal remark, status, and with include=payment the amount, fees, taxes, refunds and transactions (card brand and last 4 digits). Returns personal data. The API key needs the attendees permission. API: GET /attendees/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| attendee_id | string | yes | Attendee id. |
| expand | string | – | Replace ids with full objects, comma-separated: event, account. |
| include | string | – | Extra data, comma-separated: payment, activity, details. |
No output schema declared.
No examples provided.
corsizio_get_event Get event details ~124
Get one event in full: dates, location, ticket prices and early-bird prices, descriptions, max spots, contact and instructors. Use include=stats for registration counts. For the attendee list use corsizio_list_attendees with the event id (or corsizio_get_event_with_attendees). API: GET /events/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| event_id | string | yes | Event id. |
| expand | string | – | Replace ids with full objects, comma-separated: filters, instructors, account. |
| include | string | – | Extra data, comma-separated: filters, stats. |
No output schema declared.
No examples provided.
corsizio_get_event_with_attendees Get event with its attendees ~131
Get one event together with its attendees (and optionally each attendee's payment) in a single call. Returns personal data of registrants (names, emails, phones, notes); only use it when you need the roster, otherwise prefer corsizio_get_event or corsizio_list_attendees with a limit. API: GET /events/{id}?include=attendees[,payment].
| Name | Type | Req | Description |
|---|---|---|---|
| event_id | string | yes | Event id. |
| include_stats | boolean | – | Also include registration statistics (default false). |
| with_payment | boolean | – | Also include each attendee's payment details (default false). |
No output schema declared.
No examples provided.
corsizio_list_attendees List attendees (registrations) ~331
List attendee registrations across the account, or for one event (event filter): name, email, phone, status, registration answers and dates. Default status is active. Filter by status (e.g. owing,!canceled), created-date range, event id, coupon code or a search word (name, email, phone). Returns personal data. The API key needs the attendees permission. API: GET /attendees.
| Name | Type | Req | Description |
|---|---|---|---|
| coupon | string | – | Only attendees who used this coupon (the coupon code, as the vendor docs describe it). |
| date | string | – | Registration (created) date range FROM:TO, YYYY-MM-DD, either side optional (UTC). |
| event | string | – | Only this event's attendees (event id from corsizio_list_events). |
| expand | string | – | Replace ids with full objects, comma-separated: event, account. |
| include | string | – | Extra data, comma-separated: payment, activity, details. |
| limit | integer | – | Results per page, 1-100 (default 20). |
| page | integer | – | Page number (default 1). The reply's paging.more says whether another page exists. |
| search | string | – | A word in the attendee's name, email or phone, or an exact attendee id. |
| status | string | – | Comma-separated statuses (default active): any, active, waiting, archived, deleted, manual, attended, absent, payment, paid, owing, early, deposit, offline, exempt, refunded, canceled. Prefix with !… |
No output schema declared.
No examples provided.
corsizio_list_events List events ~387
List the account's events (classes, workshops, camps) with dates, location, prices and page URLs, newest start first by default. Only published events unless status says otherwise. Filter by status, date range, price range, category/location/age/gender/level id (from corsizio_get_account) or a name word. API: GET /events.
| Name | Type | Req | Description |
|---|---|---|---|
| age | string | – | Age group id (from corsizio_get_account). |
| category | string | – | Category id (from corsizio_get_account). |
| date | string | – | Event start/end date range FROM:TO, YYYY-MM-DD, either side optional, e.g. 2026-06-01:2026-06-30 or :2026-12-31 or just 2026 (UTC). |
| expand | string | – | Replace ids with full objects, comma-separated: filters, instructors, account. |
| gender | string | – | Gender id (from corsizio_get_account). |
| include | string | – | Extra data, comma-separated: details, filters, stats, config. |
| level | string | – | Level id (from corsizio_get_account). |
| limit | integer | – | Results per page, 1-100 (default 20). |
| location | string | – | Location id (from corsizio_get_account). |
| order | string | – | Sort order; a leading - is descending (default -startDate). |
| page | integer | – | Page number (default 1). The reply's paging.more says whether another page exists. |
| price | string | – | Price range FROM:TO, e.g. 50:200, :300 (300 and under) or 1000 (1000 and over). |
| search | string | – | A word in the event name, or an exact event id. |
| status | string | – | Event status (default published). |
No output schema declared.
No examples provided.
How do I install the Corsizio MCP by usefulapi server?
Corsizio MCP by usefulapi is a hosted endpoint at https://corsizio.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · corsizio.usefulapi.io
claude mcp add --transport http io-usefulapi-corsizio 'https://corsizio.usefulapi.io/mcp'
What is the Corsizio MCP by usefulapi server?
Corsizio MCP by usefulapi is listed in the public MCP registry as io.usefulapi/corsizio. Read Corsizio events, attendees and registrations, including payment status. Read-only. This page covers its hosted endpoint (https://corsizio.usefulapi.io/mcp).
Is the Corsizio MCP by usefulapi server safe to use?
Corsizio MCP by usefulapi scores 62 out of 100 on VerifyMCP. 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 Corsizio MCP by usefulapi server expose?
Corsizio MCP by usefulapi exposes 6 tools: corsizio_get_account, corsizio_list_events, corsizio_get_event, corsizio_get_event_with_attendees, corsizio_list_attendees, corsizio_get_attendee. Their descriptions and schemas cost roughly 1,167 tokens of context every time the server is loaded.
Does the Corsizio MCP by usefulapi server require authentication?
Yes. Corsizio MCP by usefulapi asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Corsizio MCP by usefulapi server still maintained?
Corsizio MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 25 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.