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Postage MCP server

Which MCP servers are Postage's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-22

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Whose server it is
  • Registry namelk.postage/postageverified in the MCP registry

The registry name sits under postage.lk. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-22
  • Stateanswerschecked 2026-10-22
  • Tools4
  • Server calls itselfPostage.lk
  • Server version0.1.0
  • Protocol version2025-06-18

On 2026-10-22 the server answered initialize and tools/list without a sign-in. First answer in 247 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: calculate local postage for letters, parcels and speed post; compare Sri Lanka Post service costs by weight.

Once connected

  • For "calculate local postage for letters, parcels and speed post", the likely first call is calculate-postage.
  • For "compare Sri Lanka Post service costs by weight", the likely first call is calculate-postage.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 13, the first on 2026-10-22
  • INITE MCP score100 of 100answers 100 · does the job 100 · definitions 100 · context 100 · connects 100
  • What an agent can do with it2 of 2 use cases
  • Answered100% of days13 of 13 daily checks
  • Median first answer525 ms
  • Space in an agent's context≈ 661 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · calculate local postage for letters, parcels and speed post
  • can do · compare Sri Lanka Post service costs by weight
  • not sure · find post offices and track cash-on-delivery items

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-22
  • calculate-postage

    Calculates Sri Lanka Post postage for a weight, in LKR. Without a destination it prices every local service (ordinary letter, open article, parcel, speed post, logi post). With a destination country it prices every international airmail…

  • calculate-cod-fee

    Calculates the Sri Lanka Post cash on delivery (COD) fee for a parcel: the Logi Post courier fee for its weight, the money order commission on the amount collected, and the flat service fee. All amounts are in LKR.

  • find-post-office

    Finds Sri Lanka Post offices and postal codes. Search by post office name, 5-digit post code, short (tele) code, or a village or town name. Returns the post code, type, grade, whether it delivers, its division, phone numbers and, for a…

  • check-prohibited-articles

    Lists the items that are prohibited or restricted when posting from Sri Lanka to a destination country by international mail. Returns every entry for the country; compare the user's item against the descriptions yourself, as wording…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "postage": {
      "type": "http",
      "url": "https://postage.lk/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http postage https://postage.lk/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://postage.lk/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.