Koskamo

Tarifkatalog MCP

An MCP server that allows AI assistants to query German mobile and data tariffs, including prices, data volumes, networks, and terms, ranked by average monthly cost over 24 months. It supports searching for specific tariff criteria and retrieving detailed provider information without requiring user authentication.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Tarifkatalog MCP logo, by TarifkatalogVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-09Operated by Tarifkatalog
MCP endpoint (Streamable HTTP)
https://tarifkat.de/mcp/open
Vendor documentation

What its tools do

3 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

3 of 3 have a description · 3 of 3 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to tarifkat.de ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Search for mobile tariffs by data volume, network, or provider
  • Retrieve detailed tariff costs and price history
  • Find the cheapest monthly cancellable tariff on a specific network
  • Compare prepaid tariffs with 5G capabilities

Source and maintenance

Vendor evidenceRegistry 1.0.0

Protocol and capabilities

Server
Tarifkatalog 1.0.0
MCP protocol negotiated in check
2025-11-25
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Tarifkatalog compares German SIM-only mobile tariffs and data-only tariffs (for tablets, laptops, routers) of about 50 providers. Prices are read daily from the providers' own pages and checked for plausibility before publication, unusual changes also by hand; tariffs not confirmed within three days are left out. Prices are in euros including VAT. Tariffs are ranked by the average cost per month over 24 months including one-time fees, not by commission. Each tariff has a url to its page on tarifkat.de with all costs, price history and a link to the provider.

Tools

3 advertised

search_tariffs — Search mobile tariffs
Advertised by the server during the last successful anonymous check.
Advertised read-only

Searches current German SIM-only mobile tariffs, or data-only tariffs, and returns them ranked, cheapest average monthly cost over 24 months first. Use it to find or compare tariffs by data volume, network, contract term, 5G, speed or provider. Returns at most 30 tariffs and the total number that match. Covers Germany only, SIM-only tariffs without a phone.

search_tariffs input schema
{
  "type": "object",
  "properties": {
    "kind": {
      "enum": [
        "phone",
        "data"
      ],
      "type": "string",
      "description": "phone: tariffs with calls and texts (default). data: data-only tariffs for tablets, laptops or routers."
    },
    "sort": {
      "enum": [
        "price",
        "monthly_fee",
        "data",
        "speed"
      ],
      "type": "string",
      "description": "price: average monthly cost over 24 months (default). monthly_fee: lowest first monthly fee. data: most data first. speed: fastest first."
    },
    "limit": {
      "type": "integer",
      "maximum": 30,
      "minimum": 1,
      "description": "Number of tariffs to return, default 10."
    },
    "only_5g": {
      "type": "boolean",
      "description": "Only tariffs with 5G."
    },
    "language": {
      "enum": [
        "de",
        "en",
        "ru",
        "tr",
        "uk"
      ],
      "type": "string",
      "description": "Language of the text fields and of the linked pages. Default de."
    },
    "networks": {
      "type": "array",
      "items": {
        "enum": [
          "telekom",
          "vodafone",
          "o2",
          "1und1",
          "d-netz"
        ],
        "type": "string"
      },
      "description": "Any of these networks; empty for all. d-netz: resellers that promise Telekom or Vodafone without saying which."
    },
    "provider": {
      "type": "string",
      "description": "Only this provider, by its slug as in the provider list, e.g. winsim."
    },
    "commitment": {
      "enum": [
        "none",
        "prepaid",
        "contract"
      ],
      "type": "string",
      "description": "none: cancellable monthly (prepaid included). prepaid: prepaid only. contract: minimum term of 12 months or more."
    },
    "allnet_flat": {
      "type": "boolean",
      "description": "Only tariffs with unlimited calls and texts to all German networks; ignored for data tariffs."
    },
    "min_data_gb": {
      "type": "integer",
      "minimum": 0,
      "description": "Minimum high-speed data per month in GB; unlimited tariffs always qualify."
    },
    "unlimited_data": {
      "type": "boolean",
      "description": "Only tariffs with unlimited data."
    },
    "min_download_mbit": {
      "type": "integer",
      "minimum": 0,
      "description": "Minimum advertised download speed in Mbit/s."
    }
  },
  "additionalProperties": false
}
search_tariffs annotations
{
  "title": "Search mobile tariffs",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
get_tariff — Get tariff details
Advertised by the server during the last successful anonymous check.
Advertised read-only

Returns one tariff in full: all costs, data, network, speed, term, a one-sentence summary and its price history. Use it when the user asks about one specific tariff, given by the id that tariff search results contain.

get_tariff input schema
{
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "integer",
      "description": "The tariff's id, as in tariff search results."
    },
    "language": {
      "enum": [
        "de",
        "en",
        "ru",
        "tr",
        "uk"
      ],
      "type": "string",
      "description": "Language of the text fields and of the linked pages. Default de."
    }
  },
  "additionalProperties": false
}
get_tariff annotations
{
  "title": "Get tariff details",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
list_providers — List providers
Advertised by the server during the last successful anonymous check.
Advertised read-only

Lists the German mobile providers in the comparison with their slug, number of phone and data tariffs, cheapest average monthly cost and networks. Use it to see which providers are covered and to get the slug that filters a tariff search by provider.

list_providers input schema
{
  "type": "object",
  "properties": {
    "language": {
      "enum": [
        "de",
        "en",
        "ru",
        "tr",
        "uk"
      ],
      "type": "string",
      "description": "Language of the text fields and of the linked pages. Default de."
    }
  },
  "additionalProperties": false
}
list_providers annotations
{
  "title": "List providers",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

  1. 2026-11-09: 1 of 1 checks answered
  2. 2026-11-10: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
675 ms
95th percentile latency
675 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 675 ms · metadata changed · 3 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http tarifkatalog-mcp https://tarifkat.de/mcp/open

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add tarifkatalog-mcp --url https://tarifkat.de/mcp/open

Cursor

Merge this server into .cursor/mcp.json in your project, then enable tarifkatalog-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "tarifkatalog-mcp": {
      "url": "https://tarifkat.de/mcp/open"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "tarifkatalog-mcp": {
      "type": "streamableHttp",
      "url": "https://tarifkat.de/mcp/open",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start tarifkatalog-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "tarifkatalog-mcp": {
      "type": "http",
      "url": "https://tarifkat.de/mcp/open"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http tarifkatalog-mcp https://tarifkat.de/mcp/open

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://tarifkat.de/mcp/open

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "tarifkatalog-mcp": {
      "serverUrl": "https://tarifkat.de/mcp/open"
    }
  }
}

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Do you run Tarifkatalog MCP?

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