Check an x402 seller before paying: verdict, failure rate and evidence from paid calls on Base.
Nothing to run from here
Fakturowo MCP by usefulapi is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
93/100
tool-list score
9
tools declared
remote
at its publisher
—
calls last 7d
What it does
Read invoices, clients and products in Fakturowo; create documents and update payment status.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user --transport http fakturowo-mcp-by-usefulapi https://fakturowo.usefulapi.io/mcp
# 2 — ask your agent for something these tools do
# fakturowo_list_documents, fakturowo_get_document, fakturowo_get_next_document_number and 6 more
Fakturowo MCP by usefulapi costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
USAll 449 servers
usefulapi449 servers
24 categories
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine and nothing runs on ours: this server answers at its publisher’s own address, and what you install is the connection straight to it.
Claude Codedeclared by this listing
This is a public server: it answers at its publisher’s own address and this marketplace is not in the path. Claude Code registers it in one command; --scope user makes it available in every project. The transport below is http, as the publisher's own manifest declares it.
claude mcp add --scope user --transport http fakturowo-mcp-by-usefulapi https://fakturowo.usefulapi.io/mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it answers at its publisher’s own address: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it writes
One config entry pointing straight at the publisher’s own address — this marketplace is not in the path, and nothing from this listing executes on your machine.
What you approve
9 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
List invoices and other documents on the account, 100 per page: id (api_numer), type, number, issue and sale date, currency, net/VAT/gross value, seller and buyer, payment status, due date and KSeF number. Filter by document type or by seller/buyer tax number. Values are the vendor's own (dates DD-MM-YYYY; dokument_rodzaj is the type code with a readable name for common types). Fakturowo api_zadan
| Parameter | Type | Required | Notes |
|---|---|---|---|
| document_type | string | no | Only this document type. |
| seller_tax_id | string | no | Only documents of the seller with this tax number (NIP). |
| buyer_tax_id | string | no | Only documents of the buyer with this tax number (NIP). |
| page | integer | no | Page number, from 1 (default 1; 100 rows per page). Pass the previous reply's next_page. |
One document by its id (api_numer, from fakturowo_list_documents or the id returned when it was created): the header fields and every line item (name, unit, quantity, net/gross price, discount, VAT rate and amount, gross value). Fakturowo api_zadanie=3 with api_numer.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| document_id | integer | yes | The document's api_numer. |
The running number Fakturowo will give the next document of a type (the sequence counter saved on the account). Nothing is created. Fakturowo api_zadanie=8.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| document_type | string | no | Document type (default vat_invoice). |
List the saved clients (contractors), 100 per page: id (api_numer), name, address, tax number, contact details, account number and notes. PESEL and ID-card numbers are never returned. Fakturowo api_zadanie=4.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| page | integer | no | Page number, from 1 (default 1; 100 rows per page). Pass the previous reply's next_page. |
One saved client by id (api_numer, from fakturowo_list_clients). PESEL and ID-card numbers are never returned. Fakturowo api_zadanie=4 with api_numer.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| client_id | integer | yes | The client's api_numer. |
List the saved products and services (the catalogue used on documents), 100 per page: id (api_numer), name, unit, VAT rate, net price, gross value, currency, comment, GTU code and discount. Fakturowo api_zadanie=6.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| page | integer | no | Page number, from 1 (default 1; 100 rows per page). Pass the previous reply's next_page. |
One saved product by id (api_numer, from fakturowo_list_products). Fakturowo api_zadanie=6 with api_numer.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| product_id | integer | yes | The product's api_numer. |
WRITE: issue a new document (invoice, proforma, receipt...) on the account. It is saved immediately and takes the next number in its sequence; this tool cannot delete it again, and calling it twice issues two documents. Issue documents one at a time and wait for each reply: Fakturowo says overlapping saves can get the same number when the account's numbering check is off. Needs a buyer and at leas
| Parameter | Type | Required | Notes |
|---|---|---|---|
| document_type | string | no | Document type (default vat_invoice). |
| seller | object | no | Seller details. |
| buyer | object | yes | Buyer details. |
| items | array | yes | Line items (1-300). |
| issue_date | string | no | Issue date (default today). |
| sale_date | string | no | Sale date (default today). |
| place | string | no | Place of issue (default: the account's saved place). |
| currency | string | no | Currency code (default PLN). |
| payment_type | string | no | Payment method / term. |
| payment_status | string | no | Payment status (default unpaid). |
| paid_amount | number | no | Amount already paid (subtracted from the total). |
| notes | string | no | Notes printed on the document. |
| public_links | boolean | no | Return public PDF and preview links (default false). |
WRITE: change the payment status of an existing document (unpaid, paid, partially_paid) and optionally the amount already paid. Only those fields are sent; Fakturowo edits the document in place. Fakturowo api_zadanie=1 with api_numer.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| document_id | integer | yes | The document's api_numer. |
| status | string | yes | New payment status. |
| paid_amount | number | no | Amount already paid (for partially_paid, or to record the amount). |
Free
$0 forever
- Every tool — any call limit is its publisher’s, not ours
- No card, and mcprush charges nothing for it
- Runs at its publisher’s own address — this marketplace is not in the path
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Fakturowo MCP by usefulapi or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
—
—
Alert at 80% · then the tool returns a normal MCP error
Used this month: —
ATool-list grade · score 93 / 100
Release 1.8.0 · scanned 1 Nov 2026
Graded from the tools this server lists, not from its source code.
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
Threat score100
Client score93
Findings0 threat · 1 capability
Capabilitymoderate
Coveragemanifest
Verificationnot in this report
Surface digest6dccb9cc01909837a977c02906e0d4837752db6e53c930a2630b34d5d87e3d07
Score vectorthreat 100 → client 93
| Term | Level | What it prices | Points |
|---|---|---|---|
| capability-exposure | moderate | capability blast radius (moderate) — client exposure if the model is manipulated | −3 |
| coverage-honesty | manifest | inspection depth (manifest) — how much of the target the scan could see | −4 |
score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.
What the scan could actually read
A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.
The scan read each tool’s name, description, input schema and annotations exactly as the server listed them the last time it answered us; no code was reviewed. We ask the server again about once a month, and a list that changed is graded again.
Tool surfaceread
Implementation sourcenot available
Package metadatanot available
Live transportnot available
The implementation source was not read — this reflects the declared tool metadata only.
Capability — what it could do if the model were manipulated
Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. moderate is the level these add up to.
| Tool | Capability tags | Why the tag was assigned |
|---|---|---|
| fakturowo_list_documents | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_get_document | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_get_next_document_number | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_list_clients | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_get_client | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_list_products | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_get_product | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| fakturowo_create_document | external-sink | external-sink: declares readOnlyHint: false, openWorldHint: true |
| fakturowo_set_document_payment_status | external-sink | external-sink: declares readOnlyHint: false, destructiveHint: true, openWorldHint: true |
Toxic-flow graph
The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.
flow-1
Untrusted input can drive an external action even though no sensitive source is exposed.
Supply chain and provenance
Integrityfirst-seen
Surface digest6dccb9cc01909837
Scanned2026-11-01
This is the first scan of this surface here, so there is nothing yet to compare it against.
Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.
Release history
This is an address its publisher runs: which release it serves is theirs to choose, so there is nothing here to pin. The history below is for reading; the current release on file is 1.8.0.
1.8.0
undated
latestNo release note was published with this version.
—
no reviews yet
Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Fakturowo MCP by usefulapi can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.