Calmido Phone Number Lookup
REMOTE · WWW.CALMIDO.COM
Who is calling? Spam reports, a verdict and the business behind NL, BE and LU phone numbers.
Available components
Last scanned (7 hours ago)
Scores higher than 89% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Search and Retrieval
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 Security83
- 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 is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 581 tokens (~193/item across 3 items; 3 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 Management70
- Stability observed for 21 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
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (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 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 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.
- 30 Oct 26 −1
- Tool “lookup_phone_number” rewrote its description, which is the text the model reads security
- Schema quality: 208 → 581 ▼ functional
- New tool “fetch” functional
- New tool “search” functional
- “lookup_phone_number” reworded the description of “country” cosmetic
- “lookup_phone_number” reworded the description of “language” cosmetic
- “lookup_phone_number” reworded the description of “number” cosmetic
- 29 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.
- 27 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.
- 25 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.
- 23 Oct 26 0
- “lookup_phone_number” reworded the description of “language” cosmetic
1 cosmetic change on this day. Switch on “Show cosmetic changes” to see it.
- 22 Oct 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.
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 5 Nov 2026 · Probed https://www.calmido.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=calmido.com | CN=YE2,O=Let's Encrypt,C=US | 13 Oct 2026 | 11 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 6b0641a89c0dc6291ba21a0889e179df84d |
| SANs: *.calmido.com, calmido.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of www.calmido.com. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| calmido.com. | present | 2371 | 13 | Verified |
| www.calmido.com. | Verified address RRset verified with the apex keys |
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; includeSubDomains |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' https://analytics.calmido.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self'; connect-src 'self' https://analytics.calmido.com; frame-src https://www.google.com; frame-ancestors 'self' https://analytics.calmido.com; base-uri 'self'; form-action 'self'; object-src 'none' |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.calmido.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://www.calmido.com/api/mcp | HTTPS enforced | 301 | https://www.calmido.com/api/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 →
fetch Fetch a Calmido directory entry ~84
Retrieve who is behind a phone number from the Calmido directory: the community verdict, the number of reports, the most reported category and the registered business, with a link to the evidence. The id is the one `search` returned: the number in E.164 digits.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The id `search` returned: the number in E.164 digits. |
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
| metadata | object | yes | – |
| text | string | yes | – |
| title | string | yes | – |
| url | string | yes | – |
No examples provided.
lookup_phone_number Look up a phone number (Calmido) ~383
Look up who is behind a phone number in the Netherlands, Belgium or Luxembourg: community reports, spam and scam categories, a trust verdict, and the registered business if there is one, from the Calmido phone directory. Use it whenever someone asks who called them, whether a number is safe, spam or a scam, or which company a number belongs to. Accepts international (+31 20 123 4567) and national (020 123 4567) formats; pass `country` for a national number outside the Netherlands. The verdict is one of: business (no reports, a known registered business), empty (no reports and no known business: not a sign that the number is safe), neutral (reported, but not enough evidence to flag), safe (reported, and the community found nothing alarming), suspicious (flagged as a threat), restricted (the identity was erased on request; the reports remain) or unavailable (the lookup could not be read: it says nothing about the number). An invalid number returns an error. Calls are rate limited per address; over the limit the error says how many seconds to wait.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | ISO 3166-1 alpha-2 country (NL, BE or LU) of a national-format number, which starts with 0. Ignored for an international number. Defaults to NL; if the number is not valid there, BE and LU are tried. |
| language | string | – | Language of the summary sentence, the category name and the page link: nl, en or fr. Defaults to en. |
| number | string | yes | The phone number: international (+31 20 123 4567, or 31201234567 without the plus) or national (020 123 4567, starting with 0). Spaces, dashes and brackets are ignored. |
| Name | Type | Req | Description |
|---|---|---|---|
| business | – | yes | – |
| number | object | yes | – |
| page_url | string | yes | – |
| report_count | integer | yes | – |
| restricted | boolean | yes | – |
| summary | string | yes | – |
| top_category | string|null | yes | – |
| verdict | string | yes | – |
No examples provided.
search Search the Calmido phone directory ~114
Find a phone number in the Calmido directory (Netherlands, Belgium, Luxembourg). The query is a phone number, international (+31 20 123 4567) or national (020 123 4567); it is not a name or free text. Returns the matching directory entry, if any. Pass its id to `fetch` for the verdict and reports.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | A phone number, international (+31 20 123 4567) or national (020 123 4567). |
| Name | Type | Req | Description |
|---|---|---|---|
| results | array | yes | – |
No examples provided.
How do I install the Calmido Phone Number Lookup MCP server?
Calmido Phone Number Lookup is a hosted endpoint at https://www.calmido.com/api/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.calmido.com
claude mcp add --transport http com-calmido-phone-number-lookup 'https://www.calmido.com/api/mcp'
What is the Calmido Phone Number Lookup MCP server?
Calmido Phone Number Lookup is an MCP server listed in the public MCP registry as com.calmido/phone-number-lookup. Who is calling? Spam reports, a verdict and the business behind NL, BE and LU phone numbers. This page covers its hosted endpoint (https://www.calmido.com/api/mcp).
Is the Calmido Phone Number Lookup MCP server safe to use?
Calmido Phone Number Lookup 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 Calmido Phone Number Lookup MCP server expose?
Calmido Phone Number Lookup exposes 3 tools: lookup_phone_number, search, fetch. Their descriptions and schemas cost roughly 581 tokens of context every time the server is loaded.
Does the Calmido Phone Number Lookup MCP server require authentication?
No. We connected to Calmido Phone Number Lookup without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Calmido Phone Number Lookup MCP server still maintained?
Calmido Phone Number Lookup is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.