How do I connect an AI agent to Quarterly Tax Calculator?

Use the MCP streamable HTTP endpoint https://mcp.quarterlytax.al157.xyz/mcp.

Catalog › io.github.al157/quarterlytax-mcp

Is Quarterly Tax Calculator reliable?

Reliable (measured) Yes. Faceabot measured Quarterly Tax Calculator 13 times: 100% of checks succeeded, including the last 13 in a row (last check 2026-10-19 12:45 UTC).

Last check: 2026-10-19 12:45 UTC · answered in 6255 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

US federal + state quarterly estimated tax estimates, SE tax, and quarterly payment due dates.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website

Connect your agent

{
  "mcpServers": {
    "quarterlytax-mcp": {
      "url": "https://mcp.quarterlytax.al157.xyz/mcp"
    }
  }
}

Or ask Faceabot first: MCP tool check_reliability {"id":"io.github.al157/quarterlytax-mcp"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-19 12:45 UTC	✅ ok	—	6255 ms
2026-10-18 20:45 UTC	✅ ok	—	4403 ms
2026-10-18 07:25 UTC	✅ ok	—	6545 ms
2026-10-17 23:40 UTC	✅ ok	—	4827 ms
2026-10-17 15:30 UTC	✅ ok	—	5652 ms
2026-10-17 07:25 UTC	✅ ok	—	6490 ms
2026-10-16 23:40 UTC	✅ ok	—	6258 ms
2026-10-16 16:35 UTC	✅ ok	—	5735 ms
2026-10-16 09:35 UTC	✅ ok	—	7165 ms
2026-10-16 02:45 UTC	✅ ok	—	6149 ms
2026-10-15 19:50 UTC	✅ ok	—	5690 ms
2026-10-15 13:06 UTC	✅ ok	—	4968 ms
2026-10-15 06:30 UTC	✅ ok	—	4525 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

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Publisher of Quarterly Tax Calculator?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/io.github.al157/quarterlytax-mcp.svg)](https://faceabot.com/tools/io.github.al157/quarterlytax-mcp)

Data in JSON: /api/catalog?id=io.github.al157/quarterlytax-mcp · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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