A full federal and state 1040 calculation pipeline exposed as MCP tools.
Connect Aiwyn Tax to Claude, Cursor or any other MCP client and it stops being a tab you switch to. Aiwyn's tax engine as an MCP server: discover schemas, validate inputs, calculate federal and state returns, and generate an IRS-formatted PDF. The aiwyn tax mcp server is what makes that connection.
Aiwyn's tax engine as an MCP server: discover schemas, validate inputs, calculate federal and state returns, and generate an IRS-formatted PDF.
Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
tax_years — List every tax year the calculation engine currently supportstax_jurisdictions — List supported jurisdictions for a given tax yeartax_namespaces — List the input namespaces available for a jurisdiction and tax yeartax_namespace_schema — Return the JSON schema for a single namespace such as irs1040, w2 or a state form, in summary or full detailtax_simple_return — Bootstrap a scenario: returns a curated namespace list, top-level input structure, example payload and a workflow guidecheck_tax — Validate an input object before calculation and surface validation errors and partial disqualificationscalculate_tax — Run the full return calculation and return a markdown summary of all computed fieldsgenerate_tax_pdf_tool — Start asynchronous generation of an IRS or state-formatted PDF return and return a job IDget_tax_pdf_tool — Poll a PDF generation job for its status and download URLgenerate_uuid_v5 — Generate a deterministic UUIDv5 from a source UUID and namespace name, used to link state entries to their federal counterpartsAn Aiwyn/Column Tax account for the OAuth flow, an MCP client supporting remote Streamable HTTP, and source tax documents for the year being calculated.
Among the payments and commerce options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Aiwyn Tax's toolset — tax_years, tax_jurisdictions, tax_namespaces and 7 more — is a fair guide to whether it matches your workflow. It is maintained by Aiwyn, Inc. rather than a third party, which usually means auth handling and breaking changes are dealt with faster.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
A user shares W-2s in chat; the assistant extracts the figures, populates the schemas, validates, calculates and returns a filled 1040 PDF.
Recalculate a return with different filing statuses, dependents or credits to see how the outcome shifts before committing to an approach.
Use the MCP tools as the calculation backend for an assistant-driven filing UI instead of building and maintaining a tax engine in-house.
Run check_tax across a batch of constructed inputs to catch schema and eligibility problems early in a data pipeline.
| Tool | What it does |
|---|---|
| tax_years | List every tax year the calculation engine currently supports. |
| tax_jurisdictions | List supported jurisdictions for a given tax year. |
| tax_namespaces | List the input namespaces available for a jurisdiction and tax year. |
| tax_namespace_schema | Return the JSON schema for a single namespace such as irs1040, w2 or a state form, in summary or full detail. |
| tax_simple_return | Bootstrap a scenario: returns a curated namespace list, top-level input structure, example payload and a workflow guide. |
| check_tax | Validate an input object before calculation and surface validation errors and partial disqualifications. |
| calculate_tax | Run the full return calculation and return a markdown summary of all computed fields. |
| generate_tax_pdf_tool | Start asynchronous generation of an IRS or state-formatted PDF return and return a job ID. |
| get_tax_pdf_tool | Poll a PDF generation job for its status and download URL. |
| generate_uuid_v5 | Generate a deterministic UUIDv5 from a source UUID and namespace name, used to link state entries to their federal counterparts. |
claude mcp add aiwyn-tax --transport http https://mcp.columnapi.com/mcpAn Aiwyn/Column Tax account for the OAuth flow, an MCP client supporting remote Streamable HTTP, and source tax documents for the year being calculated.
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