Open Quality
REMOTE · OPENQUALITY.US · 2 COMPONENTS
Open healthcare quality measures: CQL, SQL and FHIR with provenance and known issues
Available components
Last scanned (23 hours ago)
Scores higher than 89% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Health and Science
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 Usability72
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 546 tokens (~109/item across 5 items; 5 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management77
- Stability observed for 23 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 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
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 4 Nov 2026 · Probed https://openquality.us/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.openquality.us | CN=YR1,O=Let's Encrypt,C=US | 12 Oct 2026 | 10 Jan 2027 | RSA 2048 | SHA256-RSA | 597f6b01af7426e177c5b5ce0d66e107a85 |
| SANs: *.openquality.us, openquality.us | ||||||
| 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 openquality.us. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| us. | present | 59017 | 8 | Verified |
| openquality.us. | 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 |
| content-security-policy | default-src 'self'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'; object-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; img-src 'self' data:; connect-src 'self' https://vitals.vercel-insights.com; upgrade-insecure-requests |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), payment=(), usb=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://openquality.us/mcp | Verified | 200 | |
| http (plaintext) | http://openquality.us/mcp | HTTPS enforced | 308 | https://openquality.us/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_artifact Get artifact ~49
The raw text of one file a package lists: CQL, SQL, a ViewDefinition, or a FHIR Measure.
| Name | Type | Req | Description |
|---|---|---|---|
| path | string | yes | A path from get_measure `artifacts` |
No output schema declared.
No examples provided.
get_bundle Get CRMI Bundle ~73
The package as a CRMI artifact Bundle, the shape CRMI's $package returns: an asset-collection Library, then the Measure, its Library and every shared library it depends on.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Package id, for example cms/diabetes-glycemic-status-assessment-greater-than-9 |
No output schema declared.
No examples provided.
get_measure Get measure ~71
A package: title, steward, license, provenance (upstream commit, unmodified or derived, and exactly what changed), value set references, file list and known issue summaries.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Package id, for example cms/diabetes-glycemic-status-assessment-greater-than-9 |
No output schema declared.
No examples provided.
known_issues Known issues ~102
Interpretation issues, defects, test cases and implementation notes, with their full text. Read these before writing or reviewing measure logic.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Maximum results, default 20 |
| measure | string | – | Package id, for example cms/diabetes-glycemic-status-assessment-greater-than-9 |
| status | string | – | open or resolved |
| type | string | – | interpretation-issue, defect, test-case or implementation-note |
No output schema declared.
No examples provided.
search_measures Search measures ~152
Find measure packages by CMS id, title words, steward or package id. Every word must match. Shared CQL libraries are packages too; pass kind "library" to search them.
| Name | Type | Req | Description |
|---|---|---|---|
| collection | string | – | Limit to a collection, for example cms-fhir-2026 or community |
| dataModel | string | – | Limit to a data model, for example qi-core or sql-on-fhir |
| kind | string | – | measure (default), library for shared CQL libraries such as FHIRHelpers, or any |
| limit | integer | – | Maximum results, default 20 |
| query | string | yes | Words to match, for example "CMS122" or "diabetes glycemic" |
No output schema declared.
No examples provided.
How do I install the Open Quality MCP server?
Open Quality is a hosted endpoint at https://openquality.us/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 · openquality.us
claude mcp add --transport http us-openquality-mcp 'https://openquality.us/mcp'
What is the Open Quality MCP server?
Open Quality is an MCP server listed in the public MCP registry as us.openquality/mcp. Open healthcare quality measures: CQL, SQL and FHIR with provenance and known issues. This page covers its hosted endpoint (https://openquality.us/mcp).
Is the Open Quality MCP server safe to use?
Open Quality scores 84 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 Open Quality MCP server expose?
Open Quality exposes 5 tools: search_measures, get_measure, get_artifact, get_bundle, known_issues. Their descriptions and schemas cost roughly 447 tokens of context every time the server is loaded.
Does the Open Quality MCP server require authentication?
No. We connected to Open Quality without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Open Quality MCP server still maintained?
Open Quality is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.