post_v1_marketplace_listings
Publish offers one tool on the marketplace, optionally monetized.
Publish offers one tool on the marketplace, optionally monetized. The tool must already resolve in the publisher's own scope, so a listing can never advertise a capability that does not exist; a listing with a price must name the payout wallet the x402 seam settles to, so a monetized offer is never unpayable. The price is exact to 18 decimal places, so a per-call price below a cent is a real price and not a rounded-away zero. The listing is owned by the publishing org, paid into a wallet of that same org, and answers 201 with the created row.
| Tool | post_v1_marketplace_listings |
| Door | https://api.hanzo.ai/v1/mcp |
| Method | tools/call (JSON-RPC 2.0) |
| Arguments | 8 |
| Operation | POST /v1/marketplace/listings |
| Product | marketplace |
Arguments
| Field | Type | Required | Default | Values | Description |
|---|---|---|---|---|---|
category | string | — | — | — | Category groups the listing in the shop window. |
currency | string | — | — | — | Currency denominates Price. |
description | string | — | — | — | Description is the long copy, clipped at 4096 characters. |
price | string | — | — | — | Price is the per-call price as a decimal USD string, exact to 18 places — "0.0025" is a quarter of a cent and stays one. Empty or "0" (the default) publishes it free; any positive price makes the listing monetized and requires Recipient. |
public | boolean | — | — | — | Public makes the listing discoverable by other orgs. Private otherwise. |
recipient | string | — | — | — | Recipient is the seller's payout wallet ID, in the publishing org — the wallet x402 pays. Required for a monetized listing. |
title | string | — | — | — | Title is the shop-window name, 1-200 characters. Required. |
tool | string | — | — | — | Tool is the registry name of the capability being offered. It must already resolve in the publisher's own scope — there are no phantom listings. |
tools/list declares a type and a description for each field and nothing further. A — means neither the door nor that operation constrains the field.
Call it
A tools/call carries every argument in one flat object — nothing binds to a path or a query string. Nothing above is required, so every declared argument is shown rather than a guess at which matter.
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": "post_v1_marketplace_listings",
"arguments": {
"category": "<category>",
"currency": "<currency>",
"description": "<description>",
"price": "<price>",
"public": false,
"recipient": "<recipient>",
"title": "<title>",
"tool": "<tool>"
}
}
}'Values are the operation's own defaults and enumerated values where it declares them, and a <placeholder> where neither source declares one. public holds a stand-in that cannot be spelled that way — JSON gives a number, a boolean and a timestamp no placeholder form — so that value is this page's, not the API's. Neither the door nor the operation declares one. tools/list needs no credential; tools/call does — called without one the door 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
| Operation | Route | Product | Summary |
|---|---|---|---|
post_v1_marketplace_listings | POST /v1/marketplace/listings | marketplace | Publish offers one tool on the marketplace, optionally monetized. |
The same capability over plain HTTP is in the marketplace API reference, on https://api.hanzo.ai.
All 755 tools · The door · API reference
Generated from tools/list on https://api.hanzo.ai/v1/mcp — 833 tools captured 2026-08-01, of which 755 are documented here (the operator surface is not published) (this build read the vendored copy; the door was unreachable).
How is this guide?