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r4ck

R0· no sign-in

Server/VPS/GPU offer search (r4ck.dev)

v1.0.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality91new
Trust81of 100
Uptime, 30 days100%
Latency p50211 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "r4ck": {
      "type": "http",
      "url": "https://r4ck.dev/mcp"
    }
  }
}
claude mcp add --transport http r4ck https://r4ck.dev/mcp
[mcp_servers.r4ck]
url = "https://r4ck.dev/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "r4ck": {
      "type": "remote",
      "url": "https://r4ck.dev/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "r4ck": {
      "type": "http",
      "url": "https://r4ck.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=r4ck&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vcjRjay5kZXYvbWNwIn0%3D"
}
{
  "servers": {
    "r4ck": {
      "type": "http",
      "url": "https://r4ck.dev/mcp"
    }
  }
}
{
  "mcpServers": {
    "r4ck": {
      "httpUrl": "https://r4ck.dev/mcp"
    }
  }
}
extensions:
  "r4ck":
    enabled: true
    name: "r4ck"
    type: streamable_http
    uri: "https://r4ck.dev/mcp"
    timeout: 300

Quality 91 / 100new

protocol88 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • warn
    protocol.list_ttltools/list carries no ttlMs, so clients re-fetch it
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene94 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations23 of 23 tools declare readOnlyHint or destructiveHint
  • warn
    tools.directory_hints14 of 23 tools declare all four hints; missing: delete_saved_search (idempotentHint); create_webhook (idempotentHint); rotate_webhook_secret (idempotentHint); …
  • pass
    tools.token_costabout 3,804 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
  • pass
    tools.hidden_textno hidden text in tool names, descriptions, schemas or annotations
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pull, stability.new_linkstool history recorded for 2 of the 7 days needed
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

23 tools, about 3,804 tokens to load them all · tool set 7aa66539603e · tools last changed 2026-11-11 · checked 2026-11-14 07:03 UTC

Tool changes

  • webhook_deliverieschangedtitle, annotations
  • rotate_webhook_secretchangedtitle, annotations
  • test_webhookchangedtitle, annotations
  • delete_webhookchangedtitle, annotations
  • update_webhookchangedtitle, annotations
  • create_webhookchangedtitle, annotations
  • list_webhookschangedtitle, annotations
  • create_invitechangedtitle, annotations
  • list_inviteschangedtitle, annotations
  • redeem_codechangedtitle, annotations

Showing the latest 10. Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 81 / 100

no-repository
provenance50
liveness100
freshness100
hygiene80

+dns-namespace +website -thin-description +reachable +uptime-100% +updated-3d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://r4ck.dev/mcp streamable-httpnoneyes100%211 ms2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-052026-11-14

Tools (23)

cheapestread-onlyThe lowest priced rows that meet the given minimums, ranked by estimated monthly USD.
compare_serversread-onlyUp to 20 offers side by side.
create_inviteMake one invite link from the caller’s quota. The link is returned once; both sides get days of the pass when a new account is made from it.
create_webhookRegister an https URL to receive the caller’s events as signed POSTs (CloudEvents body, Standard Webhooks headers). Returns the endpoint and its signing secret (whsec_…), shown once.
dealsread-onlyCurrent hosting deals and industry stories.
delete_saved_searchdestructiveRemove one saved search by id.
delete_webhookdestructiveDelete an endpoint and its delivery log.
facetsread-onlyEvery facet value with its count, under an optional filter set.
get_providerread-onlyA provider by slug or domain, with every offer it sells here.
get_serverread-onlyOne offer by id with its provider, price history and similar offers.
list_invitesread-onlyThe caller’s invites (quota, status of each) and open affiliate link. Invites are scarce and single use.
list_providersread-onlyHosting providers with their automation (api, cli, terraform, mcp), country, categories and runtimes. Filter with has, country, category, runtime, q.
list_webhooksread-onlyThe caller’s webhook endpoints (url, event filters, on/off, failures) and the event types r4ck sends: server.listed and server.price_dropped for offers matching a saved search, pass.granted, api_key.created, api_key.revoked.
parse_queryread-onlySee how a sentence would be read, without running it.
redeem_codeRedeem a credit code (CR-…) on the caller’s account for days of the pass: no hourly allowance and 500 rows a page on every key, the CLI and MCP while it runs.
rotate_webhook_secretdestructiveMint a new signing secret and return it; the old one stops working at once.
saved_searchesread-onlyThe caller’s saved searches, each with its URL, curl and CLI form.
save_searchSave a filter set under a name on the caller’s account.
search_serversread-onlySearch every offer by spec, price and place. Returns rows, how the sentence was understood, and facet counts for narrowing. Prices carry the billed amount and an estimated USD per month.
statsread-onlyCounts of servers, providers, countries, GPU offers and the last sync.
test_webhookSend a signed webhook.test event to the endpoint now and report the HTTP status.
update_webhookChange an endpoint’s url, events or description, or switch it on/off (switching on clears its failure count).
webhook_deliveriesread-onlyRecent deliveries (status, attempts, last HTTP status or error, payload), for one endpoint or all.

Schemas: list_tools.

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Official server.json
{
  "name": "com.profullstack/r4ck",
  "title": "r4ck",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://r4ck.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "websiteUrl": "https://r4ck.dev",
  "description": "Server/VPS/GPU offer search (r4ck.dev)"
}