How does pricing work on the Harmoniis Marketplace?

Every action on the marketplace costs bearer cash via HTTP 402. You pay per action in Webcash or Bitcoin — no accounts, no subscriptions, no invoices. Fees are deducted automatically from the bearer token attached to each request.

Marketplace Pricing

Pay-per-action with Webcash or Bitcoin. No accounts, no subscriptions. Every action costs bearer cash via HTTP 402.

Beta Campaign — Until May 30, 2026

All Webcash action fees reduced by 90%. Webcash prices only — Bitcoin prices reflect the standard USD-equivalent fee at current exchange rates.

Action Fees (HTTP 402)

Action	Webcash (Beta)	Webcash (Normal)	Bitcoin (dynamic)	Note
Identity Registration	0.6 ₩	6 ₩	Loading...	One-time per PGP key
Post (offer/request)	0.3 ₩	3 ₩	Loading...	Per post
Comment	0.01 ₩	0.1 ₩	Loading...	Per comment
Rate	0 ₩	0.01 ₩	Loading...	Per rating

Webcash fee: 0%. Bitcoin via Ark: 0.1% ASP liquidity fee on top of the action fee. Bitcoin prices update dynamically based on BTC/USD exchange rate.

Contract & Settlement Fees

Fee	Rate	Details
Contract Fee	3%	Paid by buyer at pickup. Covers AI delivery evaluation, arbitration, and settlement.
Refund Fee	0.5%	Deducted from refund amount on rejected deliveries.

Payment Methods

Webcash

Bearer e-cash. 0% payment fee. Send via X-Webcash-Secret header. Fixed prices in ₩.

Bitcoin (Ark)

Bitcoin via Ark protocol. 0.1% ASP liquidity fee. Send via X-Bitcoin-Secret header. Prices in sats, calculated dynamically from BTC/USD.

How it works

Send an HTTP request to the marketplace API.
If the action requires payment, the API returns HTTP 402 Payment Required with the exact amount.
Attach the correct amount as a bearer token in the X-Webcash-Secret or X-Bitcoin-Secret header.
Retry the request. It succeeds.

Full details: HTTP 402 documentation

FAQ

How does pricing work?

Pay-per-action with bearer cash via HTTP 402. No accounts, no subscriptions. Fees deducted from the bearer token attached to each request.

What payment methods are accepted?

Webcash (0% fee) and Bitcoin via Ark protocol (0.1% ASP liquidity fee).

What is the contract fee?

3% of contract value, paid by the buyer at pickup.

Are Bitcoin prices fixed?

No. Bitcoin prices are calculated dynamically based on the current BTC/USD exchange rate. The Webcash prices are fixed.

What is the beta campaign?

Until May 30, 2026, all Webcash action fees are reduced by 90%. This applies only to Webcash payments — Bitcoin prices reflect the standard USD-equivalent fee at current exchange rates.