Postly MCP

Postly MCP enables AI agents to send physical printed letters to Danish addresses. It supports creating letter orders, checking pricing, managing account balance, and retrieving letter status. The server handles printing, enveloping, and handing over mail to the Danish postal service dao.

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.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by Postly

MCP endpoint (Streamable HTTP)

https://postly.dk/api/public/v1/mcp

Vendor documentation

What its tools do

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

Can change data (2)

send_letter
create_letter_order

7 of 7 have a description · 7 of 7 declare behavior hints · 0 of 5 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 7, 2026, 4:06 AM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Create a letter order by uploading a PDF or providing text
Check current pricing for standard and registered mail
Retrieve account balance and status information
Get status updates for sent letters

Source and maintenance

Community listingRegistry 1.0.0

mcp-registry: io.github.gustavmakes/postly@1.0.0 Project website

Protocol and capabilities

Server: postly 1.0.0
MCP protocol negotiated in check: 2025-06-18
Tools: 7 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.

Værktøjer til at sende fysiske breve i Danmark via Postly. Uden API-nøgle: brug create_letter_order, som returnerer et betalingslink, som brugeren selv skal åbne og betale; brevet sendes først efter betaling. Med API-nøgle: send_letter trækker fra den forudbetalte saldo. Bekræft altid modtagerens adresse og prisen med brugeren, før du opretter et brev.

Tools

7 advertised

get_pricing — Hent priser

Advertised by the server during the last successful anonymous check.

Advertised read-only

Henter Postlys aktuelle priser for almindelige og rekommanderede breve.

get_pricing input schema

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

get_pricing annotations

{
  "readOnlyHint": true,
  "openWorldHint": false
}

get_balance — Hent saldo

Advertised by the server during the last successful anonymous check.

Advertised read-only

Viser den forudbetalte saldo og kontostatus for den tilknyttede API-kunde.

get_balance input schema

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

get_balance annotations

{
  "readOnlyHint": true,
  "openWorldHint": false
}

send_letter — Send brev

Advertised by the server during the last successful anonymous check.

Open-world

Sender et fysisk brev i Danmark. Beløbet trækkes fra den forudbetalte saldo, og brevet kan ikke annulleres efter afsendelse.

send_letter input schema

{
  "type": "object",
  "$defs": {
    "address": {
      "type": "object",
      "required": [
        "name",
        "address",
        "zip",
        "city"
      ],
      "properties": {
        "zip": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "name": {
          "type": "string"
        },
        "address": {
          "type": "string"
        },
        "company": {
          "type": "string"
        },
        "address2": {
          "type": "string"
        }
      }
    }
  },
  "required": [
    "letterType",
    "sender",
    "recipient"
  ],
  "properties": {
    "text": {
      "type": "string",
      "description": "Brevets tekst. Udelades hvis der sendes en PDF."
    },
    "sender": {
      "$ref": "#/$defs/address"
    },
    "fileName": {
      "type": "string"
    },
    "template": {
      "enum": [
        "paakrav-manglende-husleje",
        "ophaevelse-af-lejemaal"
      ],
      "type": "string",
      "description": "Skabelon i stedet for text: Postly skriver brevet ud fra templateData. Påkrav og ophævelse sendes altid rekommanderet."
    },
    "recipient": {
      "$ref": "#/$defs/address"
    },
    "reference": {
      "type": "string",
      "description": "Din egen reference, fx et ordrenummer."
    },
    "fileBase64": {
      "type": "string",
      "description": "PDF som base64."
    },
    "letterType": {
      "enum": [
        "almindelig",
        "rekommanderet"
      ],
      "type": "string"
    },
    "testOutcome": {
      "enum": [
        "delivered",
        "attempted",
        "not_collected"
      ],
      "type": "string",
      "description": "Kun med testnøgle: hvordan testbrevet ender."
    },
    "templateData": {
      "type": "object",
      "description": "Påkrav: rentalAddress, lastPaymentDay (YYYY-MM-DD), payment, items [{type: husleje, period, amount}], fee (true/false), senderCvr (valgfri). Ophævelse: rentalAddress, paakravDate, paakravReceivedDate, arrears, stillUnpaid (yes), moveOutBy."
    },
    "idempotencyKey": {
      "type": "string",
      "description": "Valgfri unik nøgle for denne afsendelse. Brug den samme nøgle, hvis kaldet gentages, så brevet ikke sendes to gange."
    }
  }
}

send_letter annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "destructiveHint": false
}

get_letter_status — Hent brevstatus

Advertised by the server during the last successful anonymous check.

Advertised read-only

Viser status for et tidligere sendt brev ud fra dets id.

get_letter_status input schema

{
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string"
    }
  },
  "additionalProperties": false
}

get_letter_status annotations

{
  "readOnlyHint": true,
  "openWorldHint": false
}

list_letters — Vis breve

Advertised by the server during the last successful anonymous check.

Advertised read-only

Lister de seneste breve sendt af denne konto.

list_letters input schema

{
  "type": "object",
  "properties": {
    "limit": {
      "type": "number",
      "maximum": 50,
      "minimum": 1
    },
    "reference": {
      "type": "string",
      "description": "Vis kun breve med denne reference."
    }
  },
  "additionalProperties": false
}

list_letters annotations

{
  "readOnlyHint": true,
  "openWorldHint": false
}

create_letter_order — Bestil brev med betalingslink (uden API-nøgle)

Advertised by the server during the last successful anonymous check.

Open-world

Opretter et fysisk tekstbrev i Danmark og returnerer et betalingslink. Brugeren skal selv åbne linket og betale; brevet sendes først, når betalingen er gennemført. Kræver ingen API-nøgle. Bekræft altid modtagerens adresse og prisen med brugeren først.

create_letter_order input schema

{
  "type": "object",
  "$defs": {
    "address": {
      "type": "object",
      "required": [
        "name",
        "address",
        "zip",
        "city"
      ],
      "properties": {
        "zip": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "name": {
          "type": "string"
        },
        "address": {
          "type": "string"
        },
        "company": {
          "type": "string"
        },
        "address2": {
          "type": "string"
        }
      }
    }
  },
  "required": [
    "letterType",
    "sender",
    "recipient",
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "description": "Brevets tekst."
    },
    "sender": {
      "$ref": "#/$defs/address"
    },
    "recipient": {
      "$ref": "#/$defs/address"
    },
    "letterType": {
      "enum": [
        "almindelig",
        "rekommanderet"
      ],
      "type": "string"
    },
    "customerEmail": {
      "type": "string",
      "description": "Valgfri e-mail til kvittering."
    }
  }
}

create_letter_order annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "destructiveHint": false
}

get_order_status — Hent ordrestatus (uden API-nøgle)

Advertised by the server during the last successful anonymous check.

Advertised read-only

Viser status for en ordre oprettet med create_letter_order, fx om den er betalt eller afsendt.

get_order_status input schema

{
  "type": "object",
  "required": [
    "orderId"
  ],
  "properties": {
    "orderId": {
      "type": "string"
    }
  },
  "additionalProperties": false
}

get_order_status annotations

{
  "readOnlyHint": true,
  "openWorldHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

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: 8562 ms
95th percentile latency: 8562 ms

Maintenance history

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

Nov 7, 2026, 4:06 AM UTC · probe · passed · 8562 ms · metadata changed · 7 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 postly-mcp https://postly.dk/api/public/v1/mcp

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 postly-mcp --url https://postly.dk/api/public/v1/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable postly-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "postly-mcp": {
      "url": "https://postly.dk/api/public/v1/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "postly-mcp": {
      "type": "streamableHttp",
      "url": "https://postly.dk/api/public/v1/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start postly-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "postly-mcp": {
      "type": "http",
      "url": "https://postly.dk/api/public/v1/mcp"
    }
  }
}

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 postly-mcp https://postly.dk/api/public/v1/mcp

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://postly.dk/api/public/v1/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "postly-mcp": {
      "serverUrl": "https://postly.dk/api/public/v1/mcp"
    }
  }
}

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Postly MCP

Endpoint and access

What its tools do

Read-only (5)

Can change data (2)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Server-provided instructions

Tools

Prompts

Resources

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other productivity and knowledge servers