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Counterfoil

by com.einvoicegoblin
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Server Details

Read stored EU e-invoice rule notes and the invoice field map. Not a validator.

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Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
URL
ChatGPT
–
Claude
–

TDQS

A4/5.0

Scored across 4 tools

Disambiguation3/5

check_invoice and search_rules are clearly distinct, but explain_error and get_rule heavily overlap: both take a rule id and return the statement, plain reading, fix, and source URL. The only real difference is that explain_error also accepts a validator message, so an agent can easily misselect between the two.

Naming Consistency5/5

All four tools follow a consistent verb_noun snake_case pattern (check_invoice, explain_error, get_rule, search_rules). No mixed conventions or vague verbs.

Tool Count4/5

Four tools is a reasonable, well-scoped set for a rule-lookup/explanation server. It is on the lean side, and the explain/get overlap slightly inflates the count relative to distinct capabilities.

Completeness3/5

Lookup and explanation are covered (get, search, explain), but there is no true validation operation—check_invoice explicitly runs no Schematron and cannot report a pass—and no way to list rules or groups directly. These gaps limit end-to-end rule-checking workflows.

Available Tools

4 tools
check_invoiceCheck invoice sliceA
Read-onlyIdempotent
Inspect

Read a UBL Invoice XML slice of at most 60000 characters. Returns the business terms that slice writes, the field-map gaps, and one stored note when BR-DE-15 finds no non-empty buyer reference (BT-10). evaluation is false: no Schematron runs. The result does not say the invoice passed. The XML is not stored. A larger file is the raw body of POST /v1/invoices/check, up to 1048576 bytes.

Inputs: xml (required).

explain_errorExplain errorA
Read-onlyIdempotent
Inspect

Read a stored rule named in a rule id or a validator message. Returns the stored statement, plain reading, fix, and source URL when a stored rule matches. Does not check an invoice.

Inputs: text (required).

get_ruleGet ruleA
Read-onlyIdempotent
Inspect

Read one stored EU e-invoice rule by id. Returns the stored statement, context, test, plain reading, fix, and source URL. Does not check an invoice.

Inputs: id (required).

search_rulesSearch rulesA
Read-onlyIdempotent
Inspect

Find stored rules by words, a BT code, or a group. Each hit returns the stored statement, plain reading, fix, and source URL. At most 100 hits. Does not check an invoice.

Inputs: bt, group, query.

Tool Schema Changelog

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