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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.

Tools: 2 delete, 0 irreversible, 12 write, 3 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/mcp
claude mcp add --transport http loutre https://api.loutre.app/mcp

Run 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.

.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.xml

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anlyon.dev badge for app.loutre/loutre
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Source: MCP Registry. Synced Nov 2, 2026, 16:17 UTC.