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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Payments & trading

Zero Plus One MCP by usefulapi

By usefulapi.io Verified namespace

Read invoices, quotes, contacts, financial reports and bank reconciliation in Zero Plus One.

WebsiteSource code
Connect to Zero Plus One MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
54 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
24

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 54 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name zero-plus-one-mcp.

  • Pass
    Lists tools

    tools/list returned 24 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 54 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 54 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    15 of 15 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-10T23:35:21.322929Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Zero Plus One MCP by usefulapi

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http zero-plus-one-mcp-by-usefulapi https://zero-plus-one.usefulapi.io/mcp

Capabilities

Tools 24

zeroplusone_get_aged_payables

Money the organization owes suppliers, by age. Zero Plus One API: GET /reports/aged-payables (scope: View financial reports).

Discovered
zeroplusone_get_aged_receivables

Money customers owe, by age. Zero Plus One API: GET /reports/aged-receivables (scope: View financial reports).

Discovered
zeroplusone_get_balance_sheet

Balance sheet as it stands now. Zero Plus One API: GET /reports/balance-sheet (scope: View financial reports).

Discovered
zeroplusone_get_cash_flow

Cash flow for a period. Zero Plus One API: GET /reports/cash-flow (scope: View financial reports).

Discovered
zeroplusone_get_contact

Get one customer or supplier by id. Zero Plus One API: GET /contacts/{id}.

Discovered
zeroplusone_get_credit_note

Get one credit note by id. Zero Plus One API: GET /credit-notes/{id}.

Discovered
zeroplusone_get_invoice

Get one invoice by id. Zero Plus One API: GET /invoices/{id}.

Discovered
zeroplusone_get_kpi_summary

Key figures for the organization. Zero Plus One API: GET /reports/kpi-summary (scope: View financial reports).

Discovered
zeroplusone_get_open_invoices

Invoices that are not fully paid. Zero Plus One API: GET /reports/open-invoices (scope: View financial reports).

Discovered
zeroplusone_get_profit_and_loss

Profit and loss for a period. Zero Plus One API: GET /reports/profit-and-loss (scope: View financial reports).

Discovered
zeroplusone_get_quote

Get one quote by id. Zero Plus One API: GET /quotes/{id}.

Discovered
zeroplusone_get_reconciliation_suggestions

Suggested matches between bank lines and the ledger for one account. Zero Plus One API: GET /reconciliation/accounts/{accountId}/suggestions (scope: View reconciliation suggestions).

Discovered
zeroplusone_get_reconciliation_summary

Reconciliation progress for one ledger account. Zero Plus One API: GET /reconciliation/accounts/{accountId}/summary.

Discovered
zeroplusone_get_recurring_invoice

Get one recurring invoice template by id. Zero Plus One API: GET /recurring-invoices/{id}.

Discovered
zeroplusone_get_tax_rate

Get one tax rate by id. Zero Plus One API: GET /tax-rates/{id}.

Discovered
zeroplusone_get_trial_balance

Trial balance as it stands now. Zero Plus One API: GET /reports/trial-balance (scope: View financial reports).

Discovered
zeroplusone_get_vat_return

VAT 201 return figures for a period. Zero Plus One API: GET /reports/vat-201 (scope: View financial reports).

Discovered
zeroplusone_list_contacts

List customers and suppliers. Zero Plus One API: GET /contacts (scope: View customers & suppliers).

Discovered
zeroplusone_list_credit_notes

List credit notes. Zero Plus One API: GET /credit-notes.

Discovered
zeroplusone_list_invoices

List the invoices in the organization. Zero Plus One API: GET /invoices (scope: View invoices).

Discovered
zeroplusone_list_quotes

List quotes. Zero Plus One API: GET /quotes.

Discovered
zeroplusone_list_reconciliation_lines

Bank statement lines for one ledger account. Zero Plus One API: GET /reconciliation/accounts/{accountId}/lines.

Discovered
zeroplusone_list_recurring_invoices

List recurring invoice templates. Zero Plus One API: GET /recurring-invoices.

Discovered
zeroplusone_list_tax_rates

List the tax rates set up in the organization. Zero Plus One API: GET /tax-rates.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected54 ms24

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