# Comparr

> Compare prices across French merchants, with recorded price history and verified price drops.

- name: fr.comparr/comparr
- version: 1.1.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 97/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/fr.comparr%2Fcomparr
- tools: https://api.protogrid.dev/v1/servers/fr.comparr%2Fcomparr/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "comparr": {
      "type": "http",
      "url": "https://www.comparr.fr/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-23d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 97/100 (strong)

### protocol: 100 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- pass `protocol.list_ttl`: tool list is cacheable (ttlMs 3600000)

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 93 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- warn `tools.directory_hints`: 1 of 4 tools declare all four hints; missing: get_product (idempotentHint); get_deals (idempotentHint); get_price_history (idempotentHint)
- pass `tools.token_cost`: about 703 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 5 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 703 tokens to load them all
- tool set hash: e3ca52c58af5e492ee314311cc0e29c2
- tools last changed: 2026-10-18T11:50:36.862Z
- badge: [![protogrid quality](https://protogrid.dev/badge/fr.comparr/comparr.svg)](https://protogrid.dev/servers/fr.comparr/comparr)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-18 `get_deals` changed (annotations)
- 2026-10-18 `get_price_history` changed (annotations)
- 2026-10-18 `get_product` changed (annotations)
- 2026-09-27 `get_price_history` changed (description)
  - before: Recorded price history of one product: best price per day across all offers AND the series of each individual offer (so you can tell a real price drop from a cheaper seller appearing). Readings are periodic snapshots (often weekly), not daily tracking — quote the dates and the number of readings.
  - after: 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.
- 2026-09-27 `search_products` changed (description)
  - before: 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 status is 'pending': call this tool again with the same query after about 60 seconds.
  - after: 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.

Full history: https://api.protogrid.dev/v1/servers/fr.comparr%2Fcomparr/changes

## Remotes

- https://www.comparr.fr/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (4)

- `get_deals`: 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.
- `get_price_history`: 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.
- `get_product`: 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.
- `search_products`: 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.