Yuki MCP by usefulapi
REMOTE · YUKI.USEFULAPI.IO
Read Yuki administrations, open invoices, ledger balances, contacts and documents.
Available components
Last scanned (7 hours ago)
Scores higher than 4% of remote servers
Reachable. Last reached 6 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Checks we ran (4)
- TLS certificate
- HSTS header
- DNSSEC
- Transport
Checks we could not complete (7)
These are gaps on our side, not findings about this hosted endpoint. We only credit what we can confirm, so a category made up entirely of them scores 0.
- Authorization in Endpoint SecurityAuthorisation not yet verified: we couldn't confirm whether this endpoint requires it.
- HTTPS in Endpoint SecurityHTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven.
- Schema quality in Schema Quality & AI Usability (scores 0 for this)Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- Stability in Stability & Change Management (scores 0 for this)Stability not yet verified: not enough scan history yet (needs a 30-day window).
- Tool coverage in Tool Coverage (scores 0 for this)Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- Tool safety in Tool Safety (scores 0 for this)Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- Capabilities in Capabilities (scores 0 for this)Capabilities not yet verified: we couldn't read the endpoint's capabilities.
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 6 Nov 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 2 Nov 26 −49
- Endpoint reachability: reachable → not serving MCP ▼ security
- Tool safety: pass → unverified ▼ security
- Authorization: pass → unverified ▼ security
- Stability: 0.20 → unverified ▼ security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 31 Oct 26 +4
- Authorization: partial → pass ▲ security
- MCP protocol: fail → pass ▲ functional
- New prompt “chase_open_sales_invoices” functional
- New prompt “check_ledger_balances” functional
- New prompt “find_archived_documents” functional
- New prompt “report_net_revenue” functional
- New prompt “review_open_purchase_invoices” functional
- MCP protocol version: 2025-06-18 → 2025-11-25 functional
- Server version: 1.7.0 → 1.9.0 functional
- Server version: 1.6.0 → 1.7.0 functional
- Server version: 1.5.2 → 1.6.0 functional
- 30 Oct 26 0
- Server version: 1.5.1 → 1.5.2 functional
- Server version: 1.5.0 → 1.5.1 functional
- 29 Oct 26 0
- Server version: 1.4.0 → 1.5.0 functional
- Server version: 1.3.0 → 1.4.0 functional
- 28 Oct 26 +1
- Server version: 1.1.0 → 1.3.0 functional
- 27 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- Server version: 1.0.0 → 1.1.0 functional
- 26 Oct 26 62
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 6 Nov 2026 · Probed https://yuki.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 13 Sept 2026 | 12 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d9be3287b0fde9630e825ba1f79bff3f |
| SANs: usefulapi.io, *.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of yuki.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| io. | DS published | 38690 | 8 | Verified |
| usefulapi.io. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|---|
| HTTP status | 302 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://yuki.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/yuki/ |
| http (plaintext) | http://yuki.usefulapi.io/mcp | Inconclusive | 302 | http://yuki.usefulapi.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
yuki_get_document Get document ~80
Details of one archive document by id (subject, type, contact, dates, amounts, folder). Archive.FindDocument.
| Name | Type | Req | Description |
|---|---|---|---|
| document_id | string | yes | Yuki document id (the ID in a document list). |
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
No output schema declared.
No examples provided.
yuki_get_document_download_url Get document download link ~90
A presigned download URL for the file of one archive document (the link works for a short time; open it in a browser). Archive.DocumentDownloadUrl.
| Name | Type | Req | Description |
|---|---|---|---|
| document_id | string | yes | Yuki document id (the ID in a document list). |
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
No output schema declared.
No examples provided.
yuki_get_gl_account_balance Get general ledger balances ~129
The balance of every general ledger account of an administration on a date (yyyy-mm-dd): account code, description, amount. Accounting.GLAccountBalance.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| date | string | yes | Balance date, yyyy-mm-dd. |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
No output schema declared.
No examples provided.
yuki_get_gl_account_scheme Get chart of accounts ~123
The general ledger accounts (chart of accounts) of an administration: code, description, type. Use the codes in yuki_list_gl_account_transactions. AccountingInfo.GetGLAccountScheme.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
No output schema declared.
No examples provided.
yuki_get_net_revenue Get net revenue ~92
The net revenue (turnover) of an administration in a date range, by transaction date. Accounting.NetRevenue.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| end_date | string | yes | Last day, yyyy-mm-dd. |
| start_date | string | yes | First day, yyyy-mm-dd. |
No output schema declared.
No examples provided.
yuki_list_administrations List administrations ~83
List the administrations (companies with their own books) this access key can reach: id, name, address, Chamber of Commerce and VAT numbers, start date. Use the ids in the other tools. Accounting.Administrations.
| Name | Type | Req | Description |
|---|---|---|---|
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
No output schema declared.
No examples provided.
yuki_list_document_folder_tabs List archive folder tabs ~72
The tabs inside one archive folder (id, name). Archive.DocumentFolderTabs.
| Name | Type | Req | Description |
|---|---|---|---|
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
| folder_id | integer | yes | Folder id from yuki_list_document_folders. |
No output schema declared.
No examples provided.
yuki_list_document_folders List archive folders ~83
The folders of the document archive (id, name). With an accountant key that reaches several domains, pass domain_id so the archive of that domain is read (default: the key's only domain). Archive.DocumentFolders.
| Name | Type | Req | Description |
|---|---|---|---|
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
No output schema declared.
No examples provided.
yuki_list_documents List archive documents ~288
Documents in the archive (invoices, receipts, bank statements...) with id, subject, type, contact, dates, amount. Narrow by archive folder or by document type, and by creation date range. Page with number_of_records and start_record. Archive.Documents / DocumentsInFolder / DocumentsByType.
| Name | Type | Req | Description |
|---|---|---|---|
| document_type | integer | – | Only this Yuki document type number. Not together with folder_id. |
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
| end_date | string | – | Last day, yyyy-mm-dd (default 2100-01-01). |
| folder_id | integer | – | Only this archive folder (id from yuki_list_document_folders). Not together with document_type. |
| number_of_records | integer | – | Documents per call (default 100, max 500). |
| offset | integer | – | Skip this many documents of the fetched batch (default 0). A long batch is cut to fit the reply: use next_offset with the same arguments. |
| sort_order | string | – | Sort order (default CreatedDesc). |
| start_date | string | – | First day, yyyy-mm-dd (default 1990-01-01). |
| start_record | integer | – | Offset of the first document (default 0). Add numberOfRecords to page on. |
No output schema declared.
No examples provided.
yuki_list_domains List domains ~67
List the Yuki domains (customer environments) this access key can reach: id, name and URL. Accountant keys reach many domains. Accounting.Domains.
| Name | Type | Req | Description |
|---|---|---|---|
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
No output schema declared.
No examples provided.
yuki_list_gl_account_transactions List general ledger transactions ~173
The transactions booked on one general ledger account in a date range: date, description, amount, contact, project. Get account codes from yuki_get_gl_account_scheme. Accounting.GLAccountTransactions.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| end_date | string | yes | Last day, yyyy-mm-dd. |
| gl_account_code | string | yes | General ledger account code, e.g. 80000. |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
| start_date | string | yes | First day, yyyy-mm-dd. |
No output schema declared.
No examples provided.
yuki_list_outstanding_creditor_items List open purchase invoices (creditors) ~213
Open items on the creditors list (unpaid purchase invoices): date, description, contact, open and original amount, reference, due date. Optionally within a date range. Accounting.OutstandingCreditorItems / OutstandingCreditorItemsByDate.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| end_date | string | – | With start_date: end of the range (yyyy-mm-dd). |
| include_bank_transactions | boolean | – | Also list unmatched bank transactions as open items (default false). |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
| sort_order | string | – | Sort order (default DateDesc). |
| start_date | string | – | With end_date: only items dated in this range (yyyy-mm-dd). |
No output schema declared.
No examples provided.
yuki_list_outstanding_debtor_items List open sales invoices (debtors) ~215
Open items on the debtors list (unpaid sales invoices): date, description, contact, open and original amount, reference, due date. Optionally within a date range. Accounting.OutstandingDebtorItems / OutstandingDebtorItemsByDate.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| end_date | string | – | With start_date: end of the range (yyyy-mm-dd). |
| include_bank_transactions | boolean | – | Also list unmatched bank transactions as open items (default false). |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
| sort_order | string | – | Sort order (default DateDesc). |
| start_date | string | – | With end_date: only items dated in this range (yyyy-mm-dd). |
No output schema declared.
No examples provided.
yuki_list_projects List projects ~140
Projects of an administration (code, description, company, contact, period, budgets), optionally filtered. AccountingInfo.GetProjects.
| Name | Type | Req | Description |
|---|---|---|---|
| administration_id | string | – | Yuki administration id (from yuki_list_administrations). Optional when the key has a single administration. |
| limit | integer | – | Most items to return (default 100, max 500). |
| offset | integer | – | Skip this many items (default 0). Use the previous reply's next_offset to read on. |
| search_option | string | – | Field to search in (default All). |
| search_value | string | – | Text to search for (ignored for All). |
No output schema declared.
No examples provided.
yuki_search_contacts Search contacts ~232
Search the contacts (customers and suppliers) of a domain by name, city, postcode, tag, email, website, phone, code, Chamber of Commerce number, VAT number or bank account. Returns at most 100 contacts per page; ask for the next page_number until the reply is empty. Contact.SearchContacts.
| Name | Type | Req | Description |
|---|---|---|---|
| active | string | – | Active, inactive or both (default Both). |
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
| offset | integer | – | Skip this many contacts of the page (default 0). A long page is cut to fit the reply: use next_offset with the same page_number, then the next page_number. |
| page_number | integer | – | Page number, starting at 1 (default 1). A page holds up to 100 contacts. |
| search_option | string | – | Field to search in (default All). |
| search_value | string | – | Text to search for. Empty lists all contacts. |
| sort_order | string | – | Sort order (default Name). |
No output schema declared.
No examples provided.
yuki_search_documents Search archive documents ~272
Search archive documents by text in the creator, contact, subject, tag or type (or all). Optionally limit to a folder or tab and a date range. Archive.SearchDocuments.
| Name | Type | Req | Description |
|---|---|---|---|
| domain_id | string | – | Yuki domain id (from yuki_list_domains). Optional when the key has a single domain. |
| end_date | string | – | Last day, yyyy-mm-dd. |
| folder_id | integer | – | Only this folder; -1 or omitted = all folders. |
| number_of_records | integer | – | Documents per call (default 100, max 500). |
| offset | integer | – | Skip this many documents of the fetched batch (default 0). A long batch is cut to fit the reply: use next_offset with the same arguments. |
| search_option | string | – | Where to search (default All). |
| search_text | string | yes | Text to search for. |
| sort_order | string | – | Sort order (default CreatedDesc). |
| start_date | string | – | First day, yyyy-mm-dd. Omit with end_date to search all years. |
| start_record | integer | – | Offset of the first document (default 0). Add numberOfRecords to page on. |
| tab_id | integer | – | Only this tab; -1 or omitted = all tabs. |
No output schema declared.
No examples provided.
How do I install the Yuki MCP by usefulapi server?
Yuki MCP by usefulapi is a hosted endpoint at https://yuki.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · yuki.usefulapi.io
claude mcp add --transport http io-usefulapi-yuki 'https://yuki.usefulapi.io/mcp'
What is the Yuki MCP by usefulapi server?
Yuki MCP by usefulapi is listed in the public MCP registry as io.usefulapi/yuki. Read Yuki administrations, open invoices, ledger balances, contacts and documents. This page covers its hosted endpoint (https://yuki.usefulapi.io/mcp).
Is the Yuki MCP by usefulapi server safe to use?
Yuki MCP by usefulapi scores 18 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Yuki MCP by usefulapi server expose?
Yuki MCP by usefulapi exposes 16 tools: yuki_list_domains, yuki_list_administrations, yuki_list_outstanding_debtor_items, yuki_list_outstanding_creditor_items, yuki_get_gl_account_balance, and 11 more. Their descriptions and schemas cost roughly 2,352 tokens of context every time the server is loaded.
Does the Yuki MCP by usefulapi server require authentication?
Its publisher declares no required credentials for Yuki MCP by usefulapi. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.
Is the Yuki MCP by usefulapi server still maintained?
Yuki MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 6 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the Yuki MCP by usefulapi server?
VerifyMCP ran 4 checks on Yuki MCP by usefulapi, covering TLS certificate, HSTS header, DNSSEC and Transport. 7 items could not be completed, a gap on our side rather than a finding about Yuki MCP by usefulapi: Authorization, HTTPS, Schema quality, Stability and 3 more. 5 categories score 0 for that reason, because we only credit what we can confirm. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.