_ registry / mcp streamable-http · checked 13h ago

klarbon

https://klarbon.app

Registry code: 3e3bcb5beefbd9ef

api record

Klarbon opens, checks and converts European e-invoices and bank statements. Call list_formats first to see the format ids. Give files as base64 or as a public https address. open_invoice and list_formats are free; check_invoice is free within the account's daily checks; convert_invoice and convert_bank_statement spend credits from the Klarbon account behind the API key, as each description states. Files are processed for the request, without a document archive.

endpoint
https://klarbon.app/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is klarbon live?
Yes — it answered the hub's last check (checked 13h ago). It answered 100% of checks over the last 30 days.
Is klarbon free to use?
Not measured yet.
What tools does klarbon have?
6 tools: list_formats, check_invoice, convert_bank_statement, open_invoice, convert_invoice, check_vat_numbers.
Is klarbon safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
248ms

last good check

priced tools
0

of 6 tools

_ answered our checks, 90 days 1 checks · signed record
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 6 tools
6 never probed 0 of 6 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • list_formats unknown never probed

    Lists every e-invoice and bank statement format Klarbon handles, with what each can do now: open, check, convert from, convert to, make. Free, no API key needed.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {}
}
    arguments 5 lines
  • check_invoice unknown never probed

    Validates an e-invoice against EN 16931 and its national rules (XRechnung, Peppol BIS and others), with each finding explained in plain words and how to fix it. With country, also applies that country's national rules on top of EN 16931 (France: the CTC rules), only when asked; Klarbon never infers the country. Free within the account's daily checks; needs an API key.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "country": {
      "enum": [
        "FR"
      ],
      "type": "string",
      "description": "Also apply this country's national rules on top of EN 16931 (FR: the French CTC rules). Only when you give it; Klarbon never infers a country from the file."
    },
    "ruleset": {
      "enum": [
        "auto",
        "en16931-ubl",
        "en16931-cii",
        "en16931-ubl-creditnote",
        "xrechnung-3.0-ubl",
        "xrechnung-3.0-cii",
        "peppol-bis3-invoice",
        "peppol-bis3-creditnote",
        "facturx-1.07-minimum",
        "facturx-1.07-basicwl",
        "facturx-1.07-basic",
        "facturx-1.07-en16931",
        "facturx-1.07-extended",
        "zugferd-2.3-minimum",
        "zugferd-2.3-basicwl",
        "zugferd-2.3-basic",
        "zugferd-2.3-en16931",
        "zugferd-2.3-extended",
        "facturx-1.09-minimum",
        "facturx-1.09-basicwl",
        "facturx-1.09-basic",
        "facturx-1.09-en16931",
        "facturx-1.09-extended",
        "zugferd-2.5-minimum",
        "zugferd-2.5-basicwl",
        "zugferd-2.5-basic",
        "zugferd-2.5-en16931",
        "zugferd-2.5-extended",
        "nlcius",
        "nlcius-cii",
        "fr-ctc",
        "fr-ctc-cii"
      ],
      "type": "string",
      "description": "A rule set id, or auto (the default) to pick it from the file. Leave it out when you give country."
    },
    "file_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "A public https address of the file. Private and local addresses are refused."
    },
    "filename": {
      "type": "string",
      "maxLength": 200,
      "description": "The file's name, which helps recognise its format."
    },
    "file_base64": {
      "type": "string",
      "maxLength": 27962031,
      "description": "The file's bytes as base64. Give this or file_url."
    }
  }
}
    arguments 67 lines
  • convert_bank_statement unknown never probed

    Converts a bank statement file (CAMT.053, MT940, CODA, Norma 43, CFONB 120, BAI2, OFX, QIF and more) to another format such as CAMT.053, MT940, CSV or Excel, and checks that the balances reconcile. When the file leaves something open, such as the date order or the opening balance, the answer is a need: call again with the same file, the answer and the resume token. Costs 1 call per started 500 transactions from the account's API balance, or credits once the API balance is empty, charged only on success. A PDF statement or scan read automatically (beta, a draft to check) costs 5 calls per started 10 pages from the API balance, or 1 credit per started 10 pages once it cannot cover that. Needs an API key.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "target"
  ],
  "properties": {
    "resume": {
      "type": "string",
      "maxLength": 16777216,
      "description": "The resume token from the last need answer."
    },
    "target": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9.-]{0,63}$",
      "description": "A bank format id, such as camt-053, mt940, bank-csv or xlsx."
    },
    "account": {
      "type": "string",
      "pattern": "^\\d{1,5}$",
      "description": "The answer to an account need, for a file with several accounts: the chosen account's position in the need's accounts list."
    },
    "century": {
      "enum": [
        "1900",
        "2000"
      ],
      "type": "string",
      "description": "The answer to a century need: the century of the file's two-digit years."
    },
    "currency": {
      "type": "string",
      "pattern": "^[A-Z]{3}$",
      "description": "The answer to a currency need: an ISO 4217 code, for a file that states no currency."
    },
    "file_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "A public https address of the file. Private and local addresses are refused."
    },
    "filename": {
      "type": "string",
      "maxLength": 200,
      "description": "The file's name, which helps recognise its format."
    },
    "date_order": {
      "enum": [
        "dmy",
        "mdy",
        "ymd"
      ],
      "type": "string",
      "description": "The answer to a dateOrder need: how the file writes its dates."
    },
    "file_base64": {
      "type": "string",
      "maxLength": 27962031,
      "description": "The file's bytes as base64. Give this or file_url."
    },
    "idempotency_key": {
      "type": "string",
      "pattern": "^[\\x21-\\x7e]+$",
      "maxLength": 255,
      "minLength": 1,
      "description": "Any unique string. Calling again with the same key and arguments within 24 hours never charges again."
    },
    "opening_balance": {
      "type": "string",
      "pattern": "^-?(?:0|[1-9]\\d{0,17})(?:\\.\\d{1,8})?$",
      "description": "The answer to an openingBalance need: the opening balance the file does not print, as a decimal string."
    },
    "statement_number": {
      "type": "string",
      "pattern": "^\\d{1,5}$",
      "description": "The statement number MT940 and CODA carry."
    },
    "decimal_separator": {
      "enum": [
        ".",
        ","
      ],
      "type": "string",
      "description": "The answer to a decimalSeparator need: the decimal separator of the file's amounts."
    }
  }
}
    arguments 87 lines
  • open_invoice unknown never probed

    Reads an e-invoice (XRechnung, ZUGFeRD, Factur-X, Peppol BIS, UBL, CII and more) into structured data: parties, lines, totals, VAT, payment details. Optionally returns print-ready HTML. Free; without an API key the anonymous daily limit applies. Files are processed for the request, without a document archive.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "html": {
      "type": "boolean",
      "description": "Also return the invoice as complete, print-ready HTML."
    },
    "locale": {
      "enum": [
        "en",
        "de",
        "fr",
        "nl",
        "it",
        "es",
        "pl",
        "pt",
        "ro",
        "sk"
      ],
      "type": "string",
      "description": "The language of the HTML's labels."
    },
    "file_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "A public https address of the file. Private and local addresses are refused."
    },
    "filename": {
      "type": "string",
      "maxLength": 200,
      "description": "The file's name, which helps recognise its format."
    },
    "file_base64": {
      "type": "string",
      "maxLength": 27962031,
      "description": "The file's bytes as base64. Give this or file_url."
    }
  }
}
    arguments 42 lines
  • convert_invoice unknown never probed

    Converts an e-invoice to another format (for example UBL to XRechnung, or CII to a Factur-X PDF) and validates the result; only a valid file is returned. Costs 1 call per invoice from the account's API balance, or 1 credit once the API balance is empty, charged only on success. Needs an API key.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "target"
  ],
  "properties": {
    "target": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9.-]{0,63}$",
      "description": "A format id that list_formats shows with convertTo, such as xrechnung or peppol-bis-billing."
    },
    "profile": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9.-]{0,63}$",
      "description": "The profile, for formats that have several."
    },
    "file_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048,
      "description": "A public https address of the file. Private and local addresses are refused."
    },
    "filename": {
      "type": "string",
      "maxLength": 200,
      "description": "The file's name, which helps recognise its format."
    },
    "file_base64": {
      "type": "string",
      "maxLength": 27962031,
      "description": "The file's bytes as base64. Give this or file_url."
    },
    "label_locale": {
      "enum": [
        "en",
        "de",
        "fr",
        "nl",
        "it",
        "es",
        "pl",
        "pt",
        "ro",
        "sk"
      ],
      "type": "string",
      "description": "The language of a rendered PDF's labels."
    },
    "idempotency_key": {
      "type": "string",
      "pattern": "^[\\x21-\\x7e]+$",
      "maxLength": 255,
      "minLength": 1,
      "description": "Any unique string. Calling again with the same key and arguments within 24 hours never charges again."
    }
  }
}
    arguments 58 lines
  • check_vat_numbers unknown never probed

    Checks up to 25 EU VAT numbers (and Northern Ireland's XI numbers) in the European Commission's VIES service: valid or not valid now, with the registered name and address where the member state gives them. Each number's format and published check digits are checked first, and one that fails is not sent. unavailable means the member state did not answer, never that the number is invalid. Free: without an API key the anonymous daily limit applies, with one 500 numbers a day. Nothing about the numbers is kept.

    mcp-tool

    {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "numbers"
  ],
  "properties": {
    "country": {
      "type": "string",
      "pattern": "^[A-Za-z]{2}$",
      "description": "The country of numbers given without their prefix."
    },
    "numbers": {
      "type": "array",
      "items": {
        "type": "string",
        "maxLength": 40
      },
      "maxItems": 25,
      "minItems": 1,
      "description": "VAT numbers as written, with or without the country prefix (EL for Greece, XI for Northern Ireland)."
    },
    "requester": {
      "type": "string",
      "maxLength": 40,
      "description": "Your own VAT number, so VIES returns a consultation number for each answer."
    }
  }
}
    arguments 29 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 3e3bcb5beefbd9ef.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/3e3bcb5beefbd9ef/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/3e3bcb5beefbd9ef/badge.svg)](https://brick.blue/agent/3e3bcb5beefbd9ef?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.