Comparr
REMOTE · WWW.COMPARR.FR · SCANNED OCT 9
Compare prices across French merchants, with recorded price history and verified price drops.
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 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 Usability80
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 527 tokens (~131/item across 4 items; 4 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 Management40
- Stability observed for 12 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 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 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
How do I install the Comparr MCP server?
Comparr is a hosted endpoint at https://www.comparr.fr/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.comparr.fr
claude mcp add --transport http fr-comparr-comparr 'https://www.comparr.fr/mcp'
{
"mcpServers": {
"fr-comparr-comparr": {
"url": "https://www.comparr.fr/mcp"
}
}
} {
"servers": {
"fr-comparr-comparr": {
"type": "http",
"url": "https://www.comparr.fr/mcp"
}
}
} [mcp_servers.fr-comparr-comparr] url = "https://www.comparr.fr/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"fr-comparr-comparr": {
"type": "remote",
"url": "https://www.comparr.fr/mcp",
"enabled": true
}
}
} openclaw mcp add fr-comparr-comparr --url 'https://www.comparr.fr/mcp' --transport streamable-http
mcp_servers:
fr-comparr-comparr:
url: "https://www.comparr.fr/mcp" {
"McpServers": {
"fr-comparr-comparr": {
"Transport": "http",
"Url": "https://www.comparr.fr/mcp"
}
}
} assistant mcp add fr-comparr-comparr -t streamable-http -u 'https://www.comparr.fr/mcp'
{
"mcpServers": {
"fr-comparr-comparr": {
"type": "http",
"url": "https://www.comparr.fr/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.
- 9 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 40. That category is still filling its 30-day observation window: 10 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.
- 7 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 33. That category is still filling its 30-day observation window: 8 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.
- 5 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.
- 3 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Sept 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.
- 28 Sept 26 +7
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Sept 26 65
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 9 Oct 2026 · Probed https://www.comparr.fr/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=www.comparr.fr | CN=YE2,O=Let's Encrypt,C=US | 30 Sept 2026 | 29 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 5c550b326bbdc3dcc477d3631341e8b7f22 |
| SANs: www.comparr.fr | ||||||
| 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 insecure
Validation of www.comparr.fr. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| fr. | present | 65381 | 13 | Verified |
| comparr.fr. | 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 |
|---|---|
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.comparr.fr/mcp | Verified | 200 | |
| http (plaintext) | http://www.comparr.fr/mcp | HTTPS enforced | 301 | https://www.comparr.fr/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_deals Baisses de prix vérifiées ~121
Current verified price drops: the SAME offer is cheaper than its own lowest recorded price over the previous 90 days, backed by several days of readings, checked within 48 h, new condition only, Amazon offers re-verified. Each deal returns its proof (reference price, period, number of reading days). Optionally filter by words in the product name.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Number of deals (default 20). |
| query | string | – | Optional words the product name must contain (e.g. "bouilloire", "airpods"). |
No output schema declared.
No examples provided.
get_price_history Historique de prix ~84
Recorded price history of one product: best price per day across all offers AND the series of each individual offer, which tells a real price drop apart from a cheaper seller appearing. Readings are periodic, dated snapshots (often weekly), not daily tracking.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | Window in days (default 180). |
| product | string | yes | Product id or slug. |
No output schema declared.
No examples provided.
get_product Fiche produit ~73
All current offers for one product (id or slug from search_products or get_deals), with the date each price was checked, the exact seller, the condition, and a 'is now a good time to buy' verdict computed from Comparr's recorded price history.
| Name | Type | Req | Description |
|---|---|---|---|
| product | string | yes | Product id or slug. |
No output schema declared.
No examples provided.
search_products Rechercher et comparer des produits ~174
Compare the prices of a product category or a specific model across merchants (France on comparr.fr, United States on comparr.co). Returns ranked products with every offer, the exact seller, the item condition and the date each price was checked. If no comparison exists yet, one is started and the result has status 'pending' with retry_after_seconds: the full results are available about 60 seconds later for the same query.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Number of products to return (default 8). |
| max_price | number | – | Optional budget in the market currency (EUR or USD). Products whose best price is above it are left out. |
| query | string | yes | What the user is looking for, in their own words (e.g. "casque bluetooth réduction de bruit", "Dyson V8"). |
No output schema declared.
No examples provided.
What is the Comparr MCP server?
Comparr is an MCP server listed in the public MCP registry as fr.comparr/comparr. Compare prices across French merchants, with recorded price history and verified price drops. This page covers its hosted endpoint (https://www.comparr.fr/mcp).
Is the Comparr MCP server safe to use?
Comparr scores 78 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 Comparr MCP server expose?
Comparr exposes 4 tools: search_products, get_product, get_price_history, get_deals. Their descriptions and schemas cost roughly 452 tokens of context every time the server is loaded.
Does the Comparr MCP server require authentication?
No. We connected to Comparr without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Comparr MCP server still maintained?
Comparr is still listed as active in the MCP registry. We last reached this channel on 9 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.