OpenAccountants is an MCP server with 14 tools an agent can call, among them check_audit_exemption, get_deadlines, get_skill. It answers at https://www.openaccountants.com/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 22 October 2026, succeeded.
Open-source AI accounting skills verified by licensed accountants (tax, VAT, payroll).
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_audit_exemption | DETERMINISTIC check of whether a private limited company qualifies for statutory audit exemption, from aggregate figures any ledger can provide (turnover, balance sheet total, average employees). Returns a determination ('exempt' | 'review' Inputs: jurisdiction, financial_year_end, turnover, balance_sheet_total, employees_average, currency |
get_deadlines | Upcoming filing/payment deadlines and recurring filing rhythms (monthly VAT, quarterly instalments) for a country or US state, from the OpenAccountants tax calendar. Use it whenever the user asks 'when is X due', mentions a filing date, or Inputs: jurisdiction, horizon_days |
get_skill | Fetch a published skill by slug, including its current-version markdown, quality tier, named verifier (where accountant-verified), and a provenance/attribution footer. Inputs: slug, reason |
get_skill_sections | Fetch the parsed sections of a skill's current version. Each section has a heading and its markdown content. Use this to pull a specific section that get_skill listed in `section_index` as not inlined (e.g. a supplier-pattern library) — pas Inputs: slug, section_index, section_indices |
list_jurisdictions | Returns every jurisdiction with published skills — countries (ISO 2), US states (US-XX), Canadian provinces — with skill counts, accountant-verified counts, and named lead verifier. Use when the user asks 'which countries does OpenAccountan |
list_rule_facets | Returns the metadata you can filter on with `search_rules` — the live jurisdictions, the domains, roles, block types (rule kinds), statuses, tax years, and a sample of topics — plus the defaults. Call this before `search_rules` to learn the |
list_skills | List published OpenAccountants skills with their quality tier and verification status. Optionally filter by jurisdiction (e.g. 'US', 'MT', 'DE', 'GB'), domain (the accounting area, e.g. 'vat-gst', 'payroll', 'income-tax'), or role ('foundat Inputs: jurisdiction, domain, role, category, limit, offset |
list_verifiers | Returns named licensed accountants who have signed off on OpenAccountants jurisdictions, with their credentials and covered jurisdictions. Use when the user asks who verified a skill or wants to see the verifier network. If the user wants o Inputs: jurisdiction |
search_rules | Sweep tax rules ACROSS jurisdictions and metadata and get back a bundled markdown rule set plus the jurisdiction's OFFICIAL SOURCE. Best for cross-cutting questions — 'VAT rates in MT, IE and DE', 'all income-tax thresholds for 2025', 'rule Inputs: jurisdictions, domains, roles, block_types, statuses, status |
search_skills | Full-text search across all published tax and accounting skills. Find, lookup, query, or discover skills by keyword, tax concept, deduction type, form number, or regulation (e.g. 'home office deduction', 'crypto capital gains', 'reverse cha Inputs: query, jurisdiction, domain, content_type |
share_with_openaccountants | Sends feedback or a review request to OpenAccountants. This is the single outbound channel; it does nothing unless the user has explicitly asked to send feedback or to request a review. Two modes: (1) `note` — an anonymized note about the g Inputs: note, skill_slug, request_review, jurisdiction, scenario, contact_email |
start | Front door for any tax / accounting question once you know what the user wants. `intent` is REQUIRED (e.g. 'taxes', 'VAT return', 'set up a company', 'find deductions', 'classify transactions', 'payroll'); pass a jurisdiction too (ISO 2-let Inputs: intent, jurisdiction, acting_as, reason, taxpayer_type |
start_help | No-argument front door — call this FIRST whenever a user asks 'how can you help me?', 'what can you do?', 'where do I start?', or otherwise opens vaguely (do NOT answer such questions by listing your tools or calling list_jurisdictions). Fo |
validate_vat_number | Check whether a business's VAT / tax-registration number is real and registered, in real time against the official government registry — and return the registered business NAME and ADDRESS when the authority discloses them. This is an autho Inputs: country_code, vat_number |
Every block below points at https://www.openaccountants.com/api/mcp. Pick your client and copy.
claude mcp add --transport http openaccountants https://www.openaccountants.com/api/mcp
{
"mcpServers": {
"openaccountants": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://www.openaccountants.com/api/mcp"]
}
}
}{
"mcpServers": {
"openaccountants": {
"url": "https://www.openaccountants.com/api/mcp"
}
}
}{
"servers": {
"openaccountants": {
"type": "http",
"url": "https://www.openaccountants.com/api/mcp"
}
}
}{
"context_servers": {
"openaccountants": {
"url": "https://www.openaccountants.com/api/mcp"
}
}
}{
"mcpServers": {
"openaccountants": {
"serverUrl": "https://www.openaccountants.com/api/mcp"
}
}
}{
"mcpServers": {
"openaccountants": {
"url": "https://www.openaccountants.com/api/mcp"
}
}
}name: OpenAccountants
version: 0.0.1
schema: v1
mcpServers:
- name: OpenAccountants
type: streamable-http
url: https://www.openaccountants.com/api/mcp{
"mcpServers": {
"openaccountants": {
"httpUrl": "https://www.openaccountants.com/api/mcp"
}
}
}{
"mcpServers": {
"openaccountants": {
"type": "http",
"url": "https://www.openaccountants.com/api/mcp"
}
}
}{
"mcpServers": {
"openaccountants": {
"url": "https://www.openaccountants.com/api/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fwww.openaccountants.com%2Fapi%2Fmcp&type=streamable_http&id=openaccountants&name=OpenAccountants
It answered our last check on 22 October 2026 in 198 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
14, as returned by the server's own tools/list on 17 September 2026: check_audit_exemption, get_deadlines, get_skill, get_skill_sections, list_jurisdictions, list_rule_facets, list_skills, list_verifiers, and 6 more.
It answered our last check on 22 October 2026 in 198 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://www.openaccountants.com/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.openaccountants. Endpoint host: www.openaccountants.com. ARD identifier: urn:air:io.github.openaccountants:mcp:openaccountants.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.