smallinvoice MCP by usefulapi
REMOTE · SMALLINVOICE.USEFULAPI.IO
Read smallinvoice contacts, invoices, offers, projects and hours; create contacts and invoices.
Available components
Last scanned (2 hours ago)
Scores higher than 4% of remote servers
Reachable. Last reached 5 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.
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.
- 1 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 +3
- Authorization: partial → pass ▲ security
- MCP protocol: fail → pass ▲ functional
- New prompt “add_a_customer_company” functional
- New prompt “check_the_invoices_of_a_customer” functional
- New prompt “create_an_invoice_for_a_customer” functional
- New prompt “find_a_customer_or_supplier” functional
- New prompt “review_hours_and_efforts_per_project” functional
- New prompt “review_offers_and_order_confirmations” functional
- MCP protocol version: 2025-06-18 → 2025-11-25 functional
- Server version: 1.8.0 → 1.10.0 functional
- Server version: 1.7.0 → 1.8.0 functional
- Server version: 1.6.2 → 1.7.0 functional
- 30 Oct 26 +1
- Server version: 1.6.1 → 1.6.2 functional
- Server version: 1.6.0 → 1.6.1 functional
- 29 Oct 26 0
- Server version: 1.5.0 → 1.6.0 functional
- Server version: 1.4.0 → 1.5.0 functional
- 28 Oct 26 0
- Server version: 1.2.0 → 1.4.0 functional
- 27 Oct 26 +1
- Server version: 1.1.0 → 1.2.0 functional
- 26 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 25 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 5 Nov 2026 · Probed https://smallinvoice.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 smallinvoice.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690 | 8 | Verified |
| usefulapi.io. | absent | 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://smallinvoice.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/smallinvoice/ |
| http (plaintext) | http://smallinvoice.usefulapi.io/mcp | Inconclusive | 302 | http://smallinvoice.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 →
smallinvoice_create_contact Create a contact ~205
WRITE: creates a new company contact (customer) in smallinvoice, with its main address. Needs the "contact" scope. POST /contacts. Nothing is sent to anyone. Private persons are not supported here (smallinvoice needs more fields for them): create those in smallinvoice. Check smallinvoice_list_contacts first so you do not create a duplicate.
| Name | Type | Req | Description |
|---|---|---|---|
| city | string | yes | Main address: city. |
| country | string | yes | Main address: ISO country code, e.g. CH. |
| currency | string | – | ISO currency, e.g. CHF or EUR. |
| string | – | E-mail address. | |
| name | string | yes | Company name, as printed on documents. |
| postcode | string | yes | Main address: postcode. |
| relation | array | – | Relation codes (default ['CL'] = client, as in the vendor's example). See the vendor docs for the others. |
| street | string | yes | Main address: street and number. |
No output schema declared.
No examples provided.
smallinvoice_create_invoice Create an invoice ~204
WRITE: creates a new invoice for a contact. Needs the "invoice" scope. POST /receivables/invoices. It is only created: it is NOT sent by e-mail or post and its status is not changed; the user reviews it in smallinvoice. Not idempotent: calling it twice creates two invoices. Use smallinvoice_list_contacts / smallinvoice_list_units first for the ids.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_address_id | integer | yes | The id of the contact's address to print (smallinvoice_list_contact_addresses, or main_address_id on the contact). |
| contact_id | integer | yes | The contact (customer) id. |
| currency | string | yes | ISO currency, e.g. CHF. |
| date | string | yes | Invoice date, yyyy-mm-dd. |
| due | string | yes | Due date, yyyy-mm-dd. |
| language | string | yes | Document language: de, en, fr or it. |
| positions | array | yes | The invoice positions. |
No output schema declared.
No examples provided.
smallinvoice_get_contact Get a contact ~83
One contact by id, with its fields. Add with=main_address for the main address. Needs the "contact" scope. GET /contacts/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The contact id (from smallinvoice_list_contacts). |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_get_delivery_note Get a delivery note ~73
One delivery note by id. Needs the "delivery_note" scope. GET /receivables/delivery-notes/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The delivery note id. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_get_invoice Get an invoice ~81
One invoice by id with its positions, totals and status. Needs the "invoice" scope. GET /receivables/invoices/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The invoice id (from smallinvoice_list_invoices). |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_get_offer Get an offer ~82
One offer (quote) by id with its positions and totals. Needs the "offer" scope. GET /receivables/offers/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The offer id (from smallinvoice_list_offers). |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_get_order_confirmation Get an order confirmation ~72
One order confirmation by id. Needs the "order_confirmation" scope. GET /receivables/order-confirmations/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The order confirmation id. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_get_owner Get the account owner ~40
The smallinvoice account the API client belongs to (the owner's id and details). A cheap check that the connection works. GET /auth/owner.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
smallinvoice_get_project Get a project ~71
One project by id. Needs the "project" scope. GET /reporting/projects/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | The project id (from smallinvoice_list_projects). |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_activities List activities ~243
List activities (the kinds of work that hours are booked on). Needs the "activity" scope. GET /reporting/activities. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_bank_accounts List bank accounts ~243
List the account's bank accounts (as printed on documents). Needs the "configuration" scope. GET /configuration/bank-accounts. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_contact_addresses List a contact's addresses ~81
All addresses of one contact. Needs the "contact" scope. GET /contacts/{contactId}/addresses.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | yes | The contact id. |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
No output schema declared.
No examples provided.
smallinvoice_list_contact_groups List contact groups ~235
List the contact groups. Needs the "contact" scope. GET /contacts/configuration/groups. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_contact_people List a contact's people ~83
The contact persons of one company contact. Needs the "contact" scope. GET /contacts/{contactId}/people.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | yes | The contact id. |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
No output schema declared.
No examples provided.
smallinvoice_list_contacts List contacts ~257
List contacts (customers and suppliers): name, type (company or person), relation, e-mail, currency. Add with=main_address for the address. Needs the "contact" scope. GET /contacts. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_cost_units List cost units ~237
List cost units. Needs the "cost_unit" scope. GET /reporting/cost-units. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_delivery_notes List delivery notes ~264
List delivery notes. Filter by contact_id or a JSON filter. Needs the "delivery_note" scope. GET /receivables/delivery-notes. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | – | Only documents of this contact (customer) id. |
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_efforts List efforts ~242
List efforts (expenses and services recorded against projects). Needs the "effort" scope. GET /reporting/efforts. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_invoice_payments List payments of an invoice ~87
The payments recorded on one invoice. Needs the "invoice" scope. GET /receivables/invoices/{invoiceId}/payments.
| Name | Type | Req | Description |
|---|---|---|---|
| invoice_id | integer | yes | The invoice id. |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
No output schema declared.
No examples provided.
smallinvoice_list_invoices List invoices ~272
List invoices: number, contact, dates, total, currency, status. Filter by contact_id or a JSON filter. Needs the "invoice" scope. GET /receivables/invoices. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | – | Only documents of this contact (customer) id. |
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_offers List offers ~262
List offers (quotes). Filter by contact_id or a JSON filter. Needs the "offer" scope. GET /receivables/offers. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | – | Only documents of this contact (customer) id. |
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_order_confirmations List order confirmations ~264
List order confirmations. Filter by contact_id or a JSON filter. Needs the "order_confirmation" scope. GET /receivables/order-confirmations. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| contact_id | integer | – | Only documents of this contact (customer) id. |
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_products List catalog products ~235
List the catalog's products (articles). Needs the "catalog" scope. GET /catalog/products. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_projects List projects ~231
List projects. Needs the "project" scope. GET /reporting/projects. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_services List catalog services ~233
List the catalog's services. Needs the "catalog" scope. GET /catalog/services. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_units List units ~253
List the units (piece, hour, ...) with their ids, which an invoice position's unit_id refers to. Needs the "configuration" scope. GET /catalog/configuration/units. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
smallinvoice_list_working_hours List working hours ~242
List recorded working hours (time tracking entries). Needs the "working_hours" scope. GET /reporting/working-hours. Returns count, total, next_offset (pass it as offset for the next page) and the items.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Optional filter as a JSON object string, e.g. {"currency":"CHF"}; combine with {"and":[...]} / {"or":[...]}. Comparators go before the value: "<", "<=", ">", ">=", "!" (not), "~" (contains), e.g. {"n… |
| limit | integer | – | Items per page (default 100, max 200). |
| offset | integer | – | Items to skip (paging: the previous reply's next_offset). |
| q | string | – | Optional free-text search over several fields. |
| sort | string | – | Optional sort: 'name' ascending, '-name' descending, '-surname,name' for several. |
| with | string | – | Optional extra fields to include, comma separated (e.g. 'main_address' on contacts). |
No output schema declared.
No examples provided.
How do I install the smallinvoice MCP by usefulapi server?
smallinvoice MCP by usefulapi is a hosted endpoint at https://smallinvoice.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 · smallinvoice.usefulapi.io
claude mcp add --transport http io-usefulapi-smallinvoice 'https://smallinvoice.usefulapi.io/mcp'
What is the smallinvoice MCP by usefulapi server?
smallinvoice MCP by usefulapi is listed in the public MCP registry as io.usefulapi/smallinvoice. Read smallinvoice contacts, invoices, offers, projects and hours; create contacts and invoices. This page covers its hosted endpoint (https://smallinvoice.usefulapi.io/mcp).
Is the smallinvoice MCP by usefulapi server safe to use?
smallinvoice 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 smallinvoice MCP by usefulapi server expose?
smallinvoice MCP by usefulapi exposes 27 tools: smallinvoice_get_owner, smallinvoice_list_contacts, smallinvoice_get_contact, smallinvoice_list_contact_addresses, smallinvoice_list_contact_people, and 22 more. Their descriptions and schemas cost roughly 4,875 tokens of context every time the server is loaded.
Does the smallinvoice MCP by usefulapi server require authentication?
Its publisher declares no required credentials for smallinvoice 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 smallinvoice MCP by usefulapi server still maintained?
smallinvoice MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.