Czech Data Box ID Validation

Check the 7-character format of a Czech data box (datová schránka) ID. Format only: these IDs have no public checksum.

cz-datova-schranka-id-validate

Example

Input

{
  "data_box_id": "abc2def"
}

Answer

{
  "input": "abc2def",
  "reason": "Data box ID matches the 7-character format (letters A-Z excluding I/O, digits 2-9).",
  "is_valid": true,
  "normalized": "ABC2DEF",
  "format_spec": "7 chars, [A-HJ-NP-Z2-9]"
}

Inputs

Field	Type	Required	What it is
`data_box_id`	string	Yes	7-character Czech data box ID (letters A-Z excluding I/O, digits 2-9)

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`input`	string	Always (present in every successful answer)
`reason`	string	Always (present in every successful answer)
`is_valid`	boolean	Always (present in every successful answer)
`normalized`	string	Always (present in every successful answer)
`format_spec`	string	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "cz-datova-schranka-id-validate",
    "inputs": {
      "data_box_id": "abc2def"
    },
    "max_price_cents": 2
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "cz-datova-schranka-id-validate",
    "inputs": {
      "data_box_id": "abc2def"
    },
    "max_price_cents": 2
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "cz-datova-schranka-id-validate",
  inputs: {
    "data_box_id": "abc2def"
  },
  max_price_cents: 2,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="cz-datova-schranka-id-validate",
    inputs={
        "data_box_id": "abc2def",
    },
    max_price_cents=2,
))

Limitations

Format-only — does not confirm data box exists
Validates the 7-character format specification. Does not confirm the data box is registered in the Czech ISDS system or held by any specific entity.
What to do instead: Ask the entity to confirm its data box identifier, or check it through ISDS with authorised access.