FastBill MCP by usefulapi
MCP server · fastbill.usefulapi.io · found in a public list · checked since 2026-10-30
Live, handshake completed · latest check
Reads and creates FastBill customers, invoices, estimates, expenses and projects.
Our summary of what its own text says it does: automated, not reviewed by a person (placement-ai/6). What this means
Placed in Invoicing and billing: Invoices, subscriptions and billing.
https://fastbill.usefulapi.io/mcp MCP endpoint (Streamable HTTP)The name is the registry's label, not ours. Not reviewed by a person. See 499 endpoints from usefulapi.io.
Our checks
An unpaid request daily, from eastern North AmericaLast 1 checks, oldest to newest; room for 29 more
1 passed, 0 failed, 29 not run.
Checked daily. Daily: 5 to 99 payers, and every new service until it has been probed 3 times.
Response times
| Window | Checks | Timeouts | Median | 90th | 95th | 99th | Fastest | Slowest |
|---|---|---|---|---|---|---|---|---|
| 24 hourssince 2026-10-30 | 1 | 0 | — | — | — | — | — | — |
| 7 dayssince 2026-10-30 | 1 | 0 | — | — | — | — | — | — |
| 30 dayssince 2026-10-30 | 1 | 0 | — | — | — | — | — | — |
Milliseconds, from eastern North America, timing the whole MCP handshake (initialize to the tools/list answer). Timeouts count at the 10000 ms limit. A dash means too few checks for that figure. As of . Definitions and method.
Details
Tools listed by the server
fastbill_complete_invoicefastbill_create_articlefastbill_create_customerfastbill_create_estimatefastbill_create_invoicefastbill_create_projectfastbill_create_time_entryfastbill_get_customerfastbill_get_invoicefastbill_list_articlesfastbill_list_contactsfastbill_list_customersfastbill_list_estimatesfastbill_list_expensesfastbill_list_invoicesfastbill_list_projectsfastbill_list_recurring_invoicesfastbill_list_revenuesfastbill_list_templatesfastbill_list_time_entriesfastbill_set_invoice_paidfastbill_update_customer
- Tools
- 22
- This list since
- 2026-10-30
- First listed to us
- 2026-10-30
- List changes, 90 days
- 0
Names as the server reported them at our latest completed handshake (mcp-handshake/2); a listed tool is not a tested one. Definitions
Access
- Our latest check
- Nothing asked
- Stated
- not stated
- Payment model
- not known
- Currency
- not known
"Nothing asked" describes one plain request, not every operation. Statements are claims, not our measurements. Definitions
Interface it declares
- Protocol
- MCP 2025-06-18
- Capabilities
- promptstools
- Transports
- streamable-http
As its initialize reply stated it at our check on (mcp-handshake/2): a claim, not tested. Definitions
Calls it declares
fastbill_list_customers term customer_number country_code city limit offsetfastbill_get_customer customer_id*fastbill_list_contacts customer_id customer_number term contact_id limit offsetfastbill_list_invoices customer_id invoice_number type start_date end_date start_due_date end_due_date start_paid_date end_paid_date start_lastupdate end_lastupdate limit offsetfastbill_get_invoice invoice_id*fastbill_list_recurring_invoices invoice_id limit offsetfastbill_list_estimates customer_id estimate_id estimate_number start_date end_date limit offsetfastbill_list_expenses invoice_id invoice_number start_date end_date start_paid_date end_paid_date limit offsetfastbill_list_revenues customer_id invoice_number start_date end_date start_paid_date end_paid_date limit offsetfastbill_list_articles article_id article_number limit offsetfastbill_list_projects project_id customer_id limit offsetfastbill_list_time_entries customer_id project_id time_id date start_date end_date limit offset
From the tool list it returned to our check (request-shape/2). * marks a required parameter; after → the fields it says it returns. What it declares, not that a call works.
Listing
In the capability tree: Payments and money / Invoicing and billing (primary). Placed by three checks by a small AI model: placed, found blind from its tasks, and verified against its own text (placement-ai/6, tree/3) on 2026-10-30. Wrong place? Tell us.
In the directory: meets our listing criteria (listing-criteria/6): ✓ says what it does; ✓ its latest check passed.
Recent probes
| When | Result | Time to headers |
|---|---|---|
cloudflare:EWR |
Live, handshake completed HTTP 200 | 33 ms |
What these figures do not show
- A passing check means the server completed the MCP handshake with us (initialize, then tools/list, with no credentials; mcp-handshake/2) or asked for credentials first (HTTP 401). It does not show that the server's tools work or what they return. Tool names are as the server listed them.
- Listed in the Official MCP Registry; this data comes from the Official MCP Registry. Its listing's description is not republished.
- Limited evidence: monitored for under 1 day (less than 30).
Something wrong here?
Operate this service and want it reviewed, corrected or removed? Email hello@agentservicedirectory.com or use the opt-out page. A wrong place in the tree? Tell us.
Machine-readable: /api/v1/services/cand_233ef5c2a8587a76