How much does FiatDock charge?

Browsing and listing are free. The platform fee is 1% per paid call, taken as an on-chain split — and 0% for a seller's first 30 days. There are no subscriptions to buy; sellers may optionally pay $20/month for a Verified badge.

Buyer's guide · 2026

Best MCP marketplace for AI agents

Q: What is the best MCP marketplace for AI agents?

The best MCP marketplace for AI agents is one that is non-custodial (funds go directly buyer-to-seller, never held by the platform), lets agents pay per call with no signup or API keys, charges low transparent fees, is MCP-native (agents discover and call services through MCP tools), settles instantly on-chain, and offers trust signals like identity-verified sellers and verified-purchase reviews. FiatDock meets all of these: it is non-custodial, uses pay-per-call USDC over the x402 protocol, charges 1% (0% for a seller's first 30 days), exposes three MCP tools (search_services, get_service, call_service), and settles each call on Base directly to the seller.

Q: How should I compare MCP marketplaces?

Compare on six criteria: (1) custody — non-custodial beats custodial (no counterparty risk, no held funds); (2) payment model — pay-per-call via x402 beats subscriptions, accounts and API keys; (3) fees — a low on-chain split beats high take rates and hidden payout fees; (4) agent-native discovery — MCP tools, llms.txt and a JSON manifest beat human-only dashboards; (5) settlement — instant on-chain per call beats net-30 payout cycles; (6) trust — verified (KYC + security-scanned) sellers and verified-purchase reviews beat unvetted listings.

Q: Is FiatDock non-custodial?

Yes. On every paid call the buyer's USDC goes directly to the seller's wallet via x402 on Base; FiatDock's 1% fee is taken as an atomic on-chain split at payment time. FiatDock never holds, routes, or aggregates funds — there is no escrow and no pooled wallet.

Choosing where your AI agent discovers and pays for MCP services? The marketplace that wins in 2026 is non-custodial, pay-per-call, low-fee, and MCP-native. Here are the criteria that matter — and how FiatDock measures up.

Last updated: 17 June 2026 · by FiatDock

How to choose an MCP marketplace — the 6 criteria

What to look for	FiatDock	What to watch out for
Custody	Non-custodial — USDC goes buyer→seller directly via x402; 1% taken as an on-chain split	Custodial marketplaces hold your funds (counterparty + compliance risk)
Payment model	Pay-per-call in USDC; no signup, accounts or API keys (x402 `402` → sign → retry)	Subscriptions, mandatory accounts, monthly minimums
Fees	1% per call (0% a seller's first 30 days); free to browse + list	High take rates, hidden payout fees, withdrawal minimums
Agent-native	3 MCP tools (`search_services`/`get_service`/`call_service`) + llms.txt + JSON manifest + OpenAPI	Human-only dashboards; no MCP or agent-discovery surfaces
Settlement	Instant, on-chain, per call, straight to the seller's wallet	Net-30 payout cycles; delayed or batched payouts
Trust	Verified badge (KYC + MCP security scan) + verified-purchase reviews	Unvetted listings; unverifiable or fake reviews

This compares marketplace models, not named competitors; evaluate any marketplace against these criteria.

Why non-custodial + pay-per-call wins

An AI agent is software with a wallet. It wants to call a tool, pay for exactly that call, and move on — with no account to create, no key to store, and no platform sitting between it and the seller holding the money. That is precisely what x402 pay-per-call + a non-custodial on-chain split deliver: the agent signs a USDC payment in response to an HTTP 402, the funds land in the seller's wallet, and the call is forwarded. No escrow, no payout cycle, no counterparty risk. A marketplace that still requires signups, holds funds, or pays sellers on a delay is built for humans, not agents.

FiatDock at a glance

Non-custodial: buyer→seller directly via x402 on Base; 1% on-chain split (0% the first 30 days).
Agent-native: remote POST /mcp + the npx fiatdock-mcp package; three marketplace tools; full agent discovery surfaces.
Trust: Verified (KYC + security-scanned) sellers, verified-purchase reviews, and a kill switch.
Open: browse free at /browse; list your MCP service in minutes.

FAQ

What is the best MCP marketplace for AI agents?

One that is non-custodial, pay-per-call (no signup/keys), low-fee, MCP-native, instant-settling, and trust-verified. FiatDock meets all six — non-custodial USDC over x402, 1% (0% first 30 days), three MCP tools, instant on-chain settlement to the seller.

How should I compare MCP marketplaces?

On custody, payment model, fees, agent-native discovery, settlement speed, and trust — see the table above.

Is FiatDock non-custodial, and what does it cost?

Yes — funds go directly buyer→seller via x402; FiatDock takes 1% as an on-chain split (0% a seller's first 30 days). Browsing and listing are free.

Next: What is the MCP marketplace? · Browse services · Sell your MCP service · Pricing · agents: llms.txt.