Loutre
app.loutre/loutreloutre.appstreamable-httpv1.0.0Scanned
Hosted mock APIs from OpenAPI, TypeScript or Postman: realistic data, errors and latency on demand.
17 tools: 2 can delete or cancel things, 12 change things and 3 only read.
- Reads private data · 0
- Reads text others write · 1
- Can send data out · 1
- No findings
Anlyon alternative
14 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
17 tools
Deletes or cancels 2Claude Code: deny
clear_rulesRemove every conditional rule of a route.No findings
Why it is in this group
- The description's first verb is "remove": a word for removing or ending something.
Description, as the server wrote it Remove every conditional rule of a route.
delete_mockPermanently delete a mock and its kept schema.No findings
Why it is in this group
- The name "delete_mock" says "delete": a word for removing or ending something.
- The description says "Permanently delete".
Description, as the server wrote it Permanently delete a mock and its kept schema.
Changes things 12Claude Code: ask
add_ruleAdd a conditional response to a route: when the request matches the conditions (query, header, path param, body field), the mock answers with this status, body and latency.No findings
Why it is in this group
- The name "add_rule" says "add": a word for a change.
Description, as the server wrote it Add a conditional response to a route: when the request matches the conditions (query, header, path param, body field), the mock answers with this status, body and latency. Rules are evaluated in order, the first match wins; x-loutre-* headers keep priority.
call_mockCall a route of the mock like an HTTP client would and return the status, the x-loutre-* headers and the body.No findings
Why it is in this group
- The name "call_mock" says "call": a word for a change.
Description, as the server wrote it Call a route of the mock like an HTTP client would and return the status, the x-loutre-* headers and the body. The headers x-loutre-status, x-loutre-delay, x-loutre-count, x-loutre-message and x-loutre-seed are honoured; latency is not awaited, it is reported in delayMs. Writes (POST, PUT, PATCH, DELETE) are persisted when persistent state is on. For a GraphQL mock, POST to its GraphQL path with the body { "query": "…", "variables": { … } }; mutations are persisted the same way.
clear_requestsEmpty the mock's request log.No findings
Why it is in this group
- The name "clear_requests" says "request": a word for a change.
Description, as the server wrote it Empty the mock's request log.
create_mockCreate a hosted mock from an OpenAPI 3.0/3.1 or Swagger 2.0 document (YAML or JSON), from TypeScript types (interfaces, types, enums: CRUD routes derived, or a route map type keyed…Can send data outNo findings
Why it is in this group
- The name "create_mock" says "create": a word for a change.
What it can reach
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Description, as the server wrote it Create a hosted mock from an OpenAPI 3.0/3.1 or Swagger 2.0 document (YAML or JSON), from TypeScript types (interfaces, types, enums: CRUD routes derived, or a route map type keyed like "GET /users") or from a Postman v2 collection, an Insomnia export (v4 JSON or v5 YAML), a Bruno collection (JSON export, or .bru files one after the other), a HAR file (headers and cookies are dropped, data is generated), a json-server db.json (records served as they are), curl commands, or a GraphQL schema (SDL or introspection JSON; Pro plan: queries, mutations and introspection answered on POST /graphql). OpenAPI 3.2 is read too. Give the document in `spec`, or its public address in `url` (then the mock re-reads it every six hours and follows changes). Returns the URL, the route list and an ownerToken to keep for later changes. Data is realistic and coherent, generated once. Without an account the mock lives seven days.
regenerate_mockGenerate a new data set (new seed), for the whole mock or for one route and the routes sharing its collection.No findings
Why it is in this group
- The description's first verb is "generate": a word for a change.
Description, as the server wrote it Generate a new data set (new seed), for the whole mock or for one route and the routes sharing its collection. A full new set forgets persisted writes.
replay_requestReplay a request from the log exactly as it was received (same method, path, headers and body) against the mock as it is now, and return the answer.No findings
Why it is in this group
- The name "replay_request" says "request": a word for a change.
Description, as the server wrote it Replay a request from the log exactly as it was received (same method, path, headers and body) against the mock as it is now, and return the answer. Useful after changing a rule, a body or a scenario.
reset_stateForget persisted writes (POST, PUT, PATCH, DELETE): the generated collections come back as they were.No findings
Why it is in this group
- The name "reset_state" says "reset": a word for a change.
Description, as the server wrote it Forget persisted writes (POST, PUT, PATCH, DELETE): the generated collections come back as they were.
set_accessLock a mock with a token (private) and/or restrict the allowed browser origins.No findings
Why it is in this group
- The name "set_access" says "set": a word for a change.
Description, as the server wrote it Lock a mock with a token (private) and/or restrict the allowed browser origins. Pro plan.
set_behaviorChange a mock's behaviour: default status, latency, jitter, error rate, persistent writes, and per route status, latency, hand-written bodies, rules.No findings
Why it is in this group
- The name "set_behavior" says "set": a word for a change.
Description, as the server wrote it Change a mock's behaviour: default status, latency, jitter, error rate, persistent writes, and per route status, latency, hand-written bodies, rules. Merge semantics: missing keys are kept, null clears.
set_domainServe the mock under the account's own hostname (Pro): declares it at Cloudflare and returns the CNAME to create (hostname → target) plus the current status; call again without hos…No findings
Why it is in this group
- The name "set_domain" says "set": a word for a change.
Description, as the server wrote it Serve the mock under the account's own hostname (Pro): declares it at Cloudflare and returns the CNAME to create (hostname → target) plus the current status; call again without hostname to re-check, or with hostname null to remove it.
set_responseSet the JSON body a route returns for a given status (hand-written response); a null body restores the generated response.No findings
Why it is in this group
- The name "set_response" says "set": a word for a change.
Description, as the server wrote it Set the JSON body a route returns for a given status (hand-written response); a null body restores the generated response.
sync_mockRe-read the schema at the mock's source URL now and update the mock if it changed (routes, fields; settings kept, persisted writes forgotten).No findings
Why it is in this group
- The name "sync_mock" says "sync": a word for a change.
Description, as the server wrote it Re-read the schema at the mock's source URL now and update the mock if it changed (routes, fields; settings kept, persisted writes forgotten). force regenerates even when the document is unchanged.
Only reads 3Show 3 read-only tools
get_mockDetails of a mock: routes with identifiers, behaviour, lock, sample generated bodies per route.No findings
Why it is in this group
- The name "get_mock" says "get": a word for reading.
Description, as the server wrote it Details of a mock: routes with identifiers, behaviour, lock, sample generated bodies per route.
get_requestsThe latest requests received by the mock, most recent first: method, path, query, status, headers and body as received (body cut at 8 KB), where the answer came from, latency.No findings
Why it is in this group
- The name "get_requests" says "get": a word for reading.
Description, as the server wrote it The latest requests received by the mock, most recent first: method, path, query, status, headers and body as received (body cut at 8 KB), where the answer came from, latency. Each entry has an id for replay_request.
list_mocksList the connected account's mocks (API token required), with their URL, routes and expiry.Reads text others writeNo findings
Why it is in this group
- The name "list_mocks" says "list": a word for reading.
What it can reach
- untrusted-inputThe description's first sentence says "list" and "url": it reads web pages, which anyone can write.
Description, as the server wrote it List the connected account's mocks (API token required), with their URL, routes and expiry.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write1
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out1
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http loutre https://api.loutre.app/mcpclaude mcp add --transport http loutre https://api.loutre.app/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__loutre__list_mocks",
"mcp__loutre__get_mock",
"mcp__loutre__get_requests"
],
"ask": [
"mcp__loutre__create_mock",
"mcp__loutre__call_mock",
"mcp__loutre__set_behavior",
"mcp__loutre__set_response",
"mcp__loutre__add_rule",
"mcp__loutre__regenerate_mock",
"mcp__loutre__replay_request",
"mcp__loutre__clear_requests",
"mcp__loutre__sync_mock",
"mcp__loutre__set_domain",
"mcp__loutre__reset_state",
"mcp__loutre__set_access"
],
"deny": [
"mcp__loutre__clear_rules",
"mcp__loutre__delete_mock"
]
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as loutre. Review it before you use it.
Capability tags behind 2 rules
- mcp__loutre__create_mock outbound
- mcp__loutre__list_mocks untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/app.loutre/loutre/verify?hash=7125d68582ab4491455570f32909d1245cb66cb385c7762f52557a8f60f8063d" | jq -e '.changed == false'Pinned hash 7125d68582ab, from Nov 2, 2026, 16:17 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/app.loutre/loutre/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
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[](https://anlyon.dev/servers/app.loutre/loutre)Source: MCP Registry. Synced Nov 2, 2026, 16:17 UTC.