Abyssfall: Operation Sunken Crown
REMOTE · WWW.ABYSSFALLGAME.COM · SCANNED OCT 2
Official Abyssfall game info, merch catalog, newsletter double opt-in, and merch reservation tools.
Available components
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 Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability55
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (poor).Fail
- Tool/resource definitions use about 511 tokens (~73/item across 7 items; 6 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety75
- 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
- Manipulation check failed: an AI judge found 2 of 8 captured unit(s) of tool text manipulative, the first being "server instructions". See how to fix → Fail
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Abyssfall: Operation Sunken Crown MCP server?
Abyssfall: Operation Sunken Crown is a hosted endpoint at https://www.abyssfallgame.com/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 · www.abyssfallgame.com
claude mcp add --transport http com-abyssfallgame-mcp 'https://www.abyssfallgame.com/mcp'
{
"mcpServers": {
"com-abyssfallgame-mcp": {
"url": "https://www.abyssfallgame.com/mcp"
}
}
} {
"servers": {
"com-abyssfallgame-mcp": {
"type": "http",
"url": "https://www.abyssfallgame.com/mcp"
}
}
} [mcp_servers.com-abyssfallgame-mcp] url = "https://www.abyssfallgame.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-abyssfallgame-mcp": {
"type": "remote",
"url": "https://www.abyssfallgame.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-abyssfallgame-mcp --url 'https://www.abyssfallgame.com/mcp' --transport streamable-http
mcp_servers:
com-abyssfallgame-mcp:
url: "https://www.abyssfallgame.com/mcp" {
"McpServers": {
"com-abyssfallgame-mcp": {
"Transport": "http",
"Url": "https://www.abyssfallgame.com/mcp"
}
}
} assistant mcp add com-abyssfallgame-mcp -t streamable-http -u 'https://www.abyssfallgame.com/mcp'
{
"mcpServers": {
"com-abyssfallgame-mcp": {
"type": "http",
"url": "https://www.abyssfallgame.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 29 Sept 26 +55
- Authorization: unverified → partial ▲ security
- Injection markers: unverified → pass ▲ security
- Stability: unverified → pass ▲ security
- Transport: fail → pass ▲ security
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- Schema quality: unverified → 100 ▲ functional
- MCP protocol: unverified → pass ▲ functional
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Sept 26 −48
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes. security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Sept 26 +48
- Injection markers: unverified → pass ▲ security
- Stability: unverified → pass ▲ security
- Transport: fail → pass ▲ security
- Authorization: Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. security
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- Schema quality: unverified → 100 ▲ functional
- MCP protocol: unverified → pass ▲ functional
- 20 Sept 26 −48
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes. security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
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 2 Oct 2026 · Probed https://www.abyssfallgame.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=www.abyssfallgame.com | CN=YR1,O=Let's Encrypt,C=US | 8 Sept 2026 | 7 Dec 2026 | RSA 2048 | SHA256-RSA | 5caf4e5477f2342cf2079ecda223e20c41f |
| SANs: www.abyssfallgame.com | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.abyssfallgame.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| abyssfallgame.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.abyssfallgame.com/mcp | Verified | 200 | |
| http (plaintext) | http://www.abyssfallgame.com/mcp | HTTPS enforced | 308 | https://www.abyssfallgame.com/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 →
get_game_info Get Game Info ~53
Verified facts about Abyssfall: Operation Sunken Crown — title, genre, status, platforms, co-op, studio, and official channels. Anything not in this data is unannounced; do not guess.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_merch_catalog Get Merch Catalog ~79
The current Abyssfall merch catalog (owner-maintained). Call this BEFORE preorder_merch to learn the valid item names. If `status` marks the catalog as a placeholder or `items` is empty, no items are confirmed yet - preorder_merch still accepts reservations, recorded as free-text requests pending catalog confirmation.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_playtest_info Get Playtest Info ~23
How to join the Abyssfall playtest (currently OPEN).
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_press_kit Get Press Kit ~19
Press contact and assets for Abyssfall.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
preorder_merch Reserve Merch (Preorder) ~118
Reserve Abyssfall merch (preorder reservation — NO payment is taken and no card is needed). Call get_merch_catalog first; if the catalog is empty or the requested item is not listed, the reservation is recorded as a free-text request pending catalog confirmation. Records the reservation; the studio emails when the item ships/charges become real. Only call with the user's explicit consent.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | – | |
| item | string | yes | – |
| name | string | – | – |
| qty | integer | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
subscribe_newsletter Subscribe to Newsletter ~70
Subscribe an email address to the official Abyssfall newsletter (the game's primary announcement channel). Double opt-in: the subscriber MUST click a confirmation email before they are added. Only call with the user's explicit consent.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | – | |
| name | string | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
What is the Abyssfall: Operation Sunken Crown MCP server?
Abyssfall: Operation Sunken Crown is an MCP server listed in the public MCP registry as com.abyssfallgame/mcp. Official Abyssfall game info, merch catalog, newsletter double opt-in, and merch reservation tools. This page covers its hosted endpoint (https://www.abyssfallgame.com/mcp).
Is the Abyssfall: Operation Sunken Crown MCP server safe to use?
Abyssfall: Operation Sunken Crown scores 80 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 Abyssfall: Operation Sunken Crown MCP server expose?
Abyssfall: Operation Sunken Crown exposes 6 tools: get_game_info, get_playtest_info, get_press_kit, get_merch_catalog, subscribe_newsletter, preorder_merch. Their descriptions and schemas cost roughly 362 tokens of context every time the server is loaded.
Does the Abyssfall: Operation Sunken Crown MCP server require authentication?
No. We connected to Abyssfall: Operation Sunken Crown without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Abyssfall: Operation Sunken Crown MCP server still maintained?
Abyssfall: Operation Sunken Crown is still listed as active in the MCP registry. We last reached this channel on 2 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.