io.github.squidcode/tapwatermap
REMOTE · MCP.TAPWATERMAP.COM · SCANNED AUG 3
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
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 Security74
- 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
- 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
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability71
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 694 tokens (~69/item across 10 items; 10 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage86
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 59% of tool parameters carry a description.Partial
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.tapwatermap.com
claude mcp add --transport http squidcode-tapwatermap https://mcp.tapwatermap.com/mcp
[mcp_servers.squidcode-tapwatermap] url = "https://mcp.tapwatermap.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"squidcode-tapwatermap": {
"type": "remote",
"url": "https://mcp.tapwatermap.com/mcp",
"enabled": true
}
}
} openclaw mcp add squidcode-tapwatermap --url https://mcp.tapwatermap.com/mcp --transport streamable-http
mcp_servers:
squidcode-tapwatermap:
url: "https://mcp.tapwatermap.com/mcp" {
"mcpServers": {
"squidcode-tapwatermap": {
"type": "http",
"url": "https://mcp.tapwatermap.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.
- 2 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +3
- 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 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 28 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 +1
- 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 64
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.tapwatermap.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=tapwatermap.com | CN=WE1,O=Google Trust Services,C=US | 23 Jun 2026 | 21 Sept 2026 | ECDSA 256 | ECDSA-SHA256 | 62634a04f3eed0e00ed0a586f102302c |
| SANs: tapwatermap.com, mcp.tapwatermap.com, *.mcp.tapwatermap.com | ||||||
| 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 |
DNSSEC insecure
Validation of mcp.tapwatermap.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| tapwatermap.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 |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.tapwatermap.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.tapwatermap.com/mcp | HTTPS enforced | 301 | https://mcp.tapwatermap.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.
compare_cities ~51
Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.
| Name | Type | Req | Description |
|---|---|---|---|
| cities | array | yes | e.g. ['Burlington, VT', 'Houston, TX'] |
No output schema declared.
No examples provided.
coverage_stats ~29
What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
explain_contaminant ~78
Plain-English explanation of an EPA contaminant by name or code: the EPA name, whether the EPA classifies it as health-based, and how often it appears in our records. Not medical advice.
| Name | Type | Req | Description |
|---|---|---|---|
| contaminant | string | yes | Contaminant name or EPA code, e.g. 'TTHM' or '2950'. |
No output schema declared.
No examples provided.
fetch ~64
Fetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.)
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | City id like 'vt/burlington' (state/slug). |
No output schema declared.
No examples provided.
find_cities ~121
Filter/rank cities across the dataset — e.g. cities in TX with open health-based violations, or cities with a specific contaminant. Returns ranked matches.
| Name | Type | Req | Description |
|---|---|---|---|
| contaminant | string | — | Optional EPA contaminant code or name (use explain_contaminant to find a code). |
| healthBasedOnly | boolean | — | — |
| limit | integer | — | — |
| minPopulation | integer | — | — |
| openViolationsOnly | boolean | — | Only cities with violations not returned to compliance. |
| state | string | — | Optional 2-letter state code. |
No output schema declared.
No examples provided.
get_city_water ~94
The core tool: what the EPA has on record for a city's tap water — the active community water systems serving it, populations, sources, and violations (contaminant, health-based or not, dates, status, level vs limit when recorded). Plain-English, sourced, never a safety verdict.
| Name | Type | Req | Description |
|---|---|---|---|
| city | string | yes | — |
| state | string | yes | 2-letter state code, e.g. 'VT'. |
No output schema declared.
No examples provided.
get_water_system ~50
EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.
| Name | Type | Req | Description |
|---|---|---|---|
| pwsid | string | yes | — |
No output schema declared.
No examples provided.
list_state_cities ~34
List all covered cities in a state (with violation counts).
| Name | Type | Req | Description |
|---|---|---|---|
| state | string | yes | 2-letter state code. |
No output schema declared.
No examples provided.
search ~59
Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | City name or partial name, e.g. 'Burlington'. |
No output schema declared.
No examples provided.
search_cities ~63
Find covered US cities by name, optionally within a state. Returns counts + the page URL for each.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | — | — |
| query | string | yes | — |
| state | string | — | Optional 2-letter state code, e.g. 'TX'. |
No output schema declared.
No examples provided.