Tax
tax: 26 operations.
Also for this capability: API · MCP · SDKs
tax: 26 operations. Name one in "op" and pass that operation's own arguments in "input". describe returns an operation's input schema.
| Tool | tax |
| Address | https://api.hanzo.ai/v1/mcp |
| Method | tools/call (JSON-RPC 2.0) |
| Arguments | 2, 1 required |
| Operation | GET /v1/tax/inbox · GET /v1/tax/inbox/{id} · GET /v1/tax/profile · GET /v1/tax/w9 · GET /v1/tax/w9/{id} |
| Product | tax |
Arguments
| Field | Type | Required | Default | Values | Description |
|---|---|---|---|---|---|
input | object | — | — | — | arguments for the chosen op |
op | string | yes | — | — | — |
tools/list declares a type, a description, which fields are required and an enumerated value set for each field and nothing further, and every column above is MCP's own. This tool takes an operation name and that operation's arguments, so what the document constrains is what goes inside input, field by field, on the operation you name — ask describe for that. A — means MCP does not constrain the field.
Call it
A tools/call carries every argument in one flat object — nothing binds to a path or a query string. This call carries exactly the arguments the operation requires, so it is the smallest one that can run.
curl -X POST https://api.hanzo.ai/v1/mcp \
-H "Authorization: Bearer $HANZO_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "tax",
"arguments": {
"op": "list_tax_filings"
}
}
}'Values are the operation's own defaults and enumerated values where it declares them, and a <placeholder> where neither source declares one. tools/list needs no credential; tools/call does — called without one MCP answers HTTP 200 with a JSON-RPC result whose isError is set and whose text says what was missing. How to get a key →
The operation behind it
tax dispatches to 26 operations. 5 of them MCP names exactly as the document ids them, and those are below; for the rest MCP has its own verb, which describe resolves.
| Operation | Route | Product | Summary |
|---|---|---|---|
get_tax_inbox | GET /v1/tax/inbox | tax | Lists the Copy B statements furnished to the caller org — every 1099 a payer on Hanzo delivered to it electronically, corrected ones beside the ones they supersede. |
get_tax_inbox_by_id | GET /v1/tax/inbox/{id} | tax | Reads one Copy B furnished to the caller org. |
get_tax_profile | GET /v1/tax/profile | tax | Returns the caller org's own tax profile — every line of its Form W-9, W-8BEN or W-8BEN-E, every number masked to its last four characters, where the certification stands, whether a W-8 is valid and when it expires, and whether the org consents to receive its 1099s electronically. |
get_tax_w9 | GET /v1/tax/w9 | tax | Lists the caller org's W-9 relationships on both sides: the W-9s it asked its payees for, with where each stands, and the requests other orgs made for its own W-9. |
get_tax_w9_by_id | GET /v1/tax/w9/{id} | tax | Reads one W-9 relationship from the caller's side. |
The same capability over plain HTTP is in the tax API reference, on https://api.hanzo.ai.
All 120 tools · MCP · API reference
Generated from tools/list on https://api.hanzo.ai/v1/mcp — 120 tools captured 2026-09-30.