0s and 1s CIS calculators
Free UK CIS calculators: deductions, deadlines, late penalties, gross payment test, verification.
Description as published in the official MCP registry.
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What we measured
| Endpoint | https://0sand1s.co.uk/mcp | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (1,053 ms) | our check, 2026-10-19 |
| Protocol version | 2026-07-28 | our check, 2026-10-19 |
| Tools (7) | cis_deduction, cis_gross_up, cis_tax_month, cis_late_penalties, cis_gross_payment_turnover_test, cis_needs_verification, cis_nil_return_check | tools/list, 2026-10-19 |
| GitHub stars | 0 | github.com/0sand1s-uk/cis-mcp |
| Last push | 2026-10-18 | GitHub API |
| Licence | MIT | GitHub API |
| Registry version | 1.0.1 · active · updated 2026-10-18 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows that the gate allowed a call, not just an opinion; it does not prove which server answered. How to file one.
Connect
claude mcp add --transport http cis https://0sand1s.co.uk/mcpCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
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[](https://openforallofus.com/tools/uk.co.0sand1s/cis)<a href="https://openforallofus.com/tools/uk.co.0sand1s/cis"><img src="https://openforallofus.com/badge/uk.co.0sand1s/cis.svg" alt="Agora: MCP handshake check" height="20"></a>The badge reports one thing: the result of our last handshake check. A server with no remote endpoint shows as "runs locally". How we check.
Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name uk.co.0sand1s/cis.