Arca
REMOTE · MCP.ARCA.BUILD · SCANNED AUG 3
Arca is a private data vault where your AI stores your structured data, semantic memory and skills.
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 →
Endpoint Security94
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- The endpoint enforces authorisation, advertised via RFC 9728 protected-resource metadata. View diagnostics → Pass
- 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
- 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 blocked by authentication: the endpoint requires auth we don't have to verify streamable-http. See how to fix → View diagnostics → Unverified
Schema Quality & AI Usability0
- Schema blocked by authentication: the endpoint requires auth we don't have to read it. See how to fix → Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.Unverified
Capabilities0
- Capabilities blocked by authentication: the endpoint requires auth we don't have to read them. See how to fix → Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · mcp.arca.build
claude mcp add --transport http build-arca-mcp-arca-mcp-server https://mcp.arca.build/
[mcp_servers.build-arca-mcp-arca-mcp-server] url = "https://mcp.arca.build/"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"build-arca-mcp-arca-mcp-server": {
"type": "remote",
"url": "https://mcp.arca.build/",
"enabled": true
}
}
} openclaw mcp add build-arca-mcp-arca-mcp-server --url https://mcp.arca.build/ --transport streamable-http
mcp_servers:
build-arca-mcp-arca-mcp-server:
url: "https://mcp.arca.build/" {
"mcpServers": {
"build-arca-mcp-arca-mcp-server": {
"type": "http",
"url": "https://mcp.arca.build/"
}
}
} 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.
- 31 Jul 26 +14
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- Transport: fail → unverified ▼ security
- Authorization: unverified → pass ▲ security
- HSTS header: unverified → pass ▲ security
- Capabilities: Capabilities blocked by authentication: the endpoint requires auth we don't have to read them. functional
- Tool coverage: Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools. functional
- Schema quality: Schema blocked by authentication: the endpoint requires auth we don't have to read it. functional
- 28 Jul 26 0
- Transport: unverified → fail ▼ security
- Authorization: pass → unverified ▼ security
- HSTS header: pass → unverified ▼ security
- Tool coverage: Tool coverage not yet verified: we couldn't read the endpoint's tools. functional
- Capabilities: Capabilities not yet verified: we couldn't read the endpoint's capabilities. functional
- Schema quality: Schema not yet verified: we couldn't read the endpoint's schema. functional
- 27 Jul 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 Jul 26 24
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 3 Aug 2026 · Probed https://mcp.arca.build
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=mcp.arca.build | CN=E8,O=Let's Encrypt,C=US | 25 May 2026 | 23 Aug 2026 | ECDSA 256 | ECDSA-SHA384 | 6cdaa5d173dddb1778216eaa82e797d58cf |
| SANs: mcp.arca.build | ||||||
| CN=E8,O=Let's Encrypt,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 Mar 2024 | 12 Mar 2027 | ECDSA 384 | SHA256-RSA | 63959363c24e7082715918bfc3d7ed56 |
DNSSEC insecure
Validation of mcp.arca.build. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| build. | present | 30770, 38839 | 8, 8 | Verified |
| arca.build. | 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 connection |
| HTTP status | 401 |
WWW-Authenticate challenge Bearer error="invalid_token", error_description="Authentication failed. The provided bearer token is invalid, expired, or no longer recognized by the server. To resolve: clear authentication tokens in your MCP client and reconnect. Your client should automatically re-register and obtain new tokens.", resource_metadata="https://mcp.arca.build/.well-known/oauth-protected-resource"
Bearer error="invalid_token", error_description="Authentication failed. The provided bearer token is invalid, expired, or no longer recognized by the server. To resolve: clear authentication tokens in your MCP client and reconnect. Your client should automatically re-register and obtain new tokens.", resource_metadata="https://mcp.arca.build/.well-known/oauth-protected-resource"| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains |
| www-authenticate | Bearer error="invalid_token", error_description="Authentication failed. The provided bearer token is invalid, expired, or no longer recognized by the server. To resolve: clear authentication tokens in your MCP client and reconnect. Your client should automatically re-register and obtain new tokens.", resource_metadata="https://mcp.arca.build/.well-known/oauth-protected-resource" |
Protected resource metadata
| Document | https://mcp.arca.build/.well-known/oauth-protected-resource |
|---|---|
| Retrieved | Yes |
| Resource | https://mcp.arca.build/ |
| Authorisation server | https://rapid-pole-17.authkit.app/ |
Transports 3 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.arca.build | Auth required | 401 | |
| sse | https://mcp.arca.build | Auth required | 401 | |
| http (plaintext) | http://mcp.arca.build | HTTPS enforced | 301 | https://mcp.arca.build:443/ |
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.
No tool schema has been captured from this endpoint yet.