Agent Skills Marketplaces Compared: A Seller Decision Matrix

The right agent skills marketplace depends on what you sell: a downloadable package, a hosted capability, or access to a maintained expert method. Those products require different buyer journeys. A site with many listings is not automatically the best place to receive payment, deliver updates, or support your particular customers.

This guide compares nine marketplace candidates and Skillfully as a managed-access alternative. It is written for sellers deciding where to launch. It does not rank services by unverified traffic, creator earnings, or payment success.

Skillfully publishes this comparison. We reviewed first-party documentation on September 30, 2026, with limited access to PromptSpace's catalog. We did not complete purchases, seller verification, installations, or payouts across these services. “Advertised” and “documented” below mean the vendor describes the capability, not that we independently exercised it.

First, what does the customer receive? A SKILL.md package can include instructions, scripts, and reference material. A hosted capability may run on someone else's infrastructure. Managed access may let a reader retrieve a maintained method while an entitlement remains active. These are different products even when all three use the word “skill.”

Second, where will buyers come from? Public browsing can help discovery, but a catalog entry does not establish demand. Authors with a newsletter, book readership, or consulting clients may care more about a reliable direct purchase and return journey than exposure beside thousands of unrelated listings.

Third, what must remain true after purchase? Decide whether the buyer needs an identifiable edition, future updates, recurring access, a team offer, or an execution service. Use these requirements as filters before comparing feature counts.

The final column identifies a question to resolve, not a finding that the service failed it.

Agensi: investigate both download and service offers

Agensi's homepage distinguishes one-time skill purchases from subscription software and promotes discovery through its store and MCP connection. Its MCP documentation also describes hosted execution through run_skill and local delivery through install_skill; subscription skills run on its servers. That breadth makes it worth examining when you want public catalog distribution.

Do not assume the subscription product and the downloadable product have identical fulfillment or support requirements. Start with the specific offer you intend to publish. Our Agensi comparison examines that choice against a direct author relationship.

MCP Market: distinguish discovery from seller operations

MCP Market's skills page combines categorized discovery, premium listings, and a hub for installing and synchronizing skills. It can be relevant when your buyer is already searching for agent tools.

Its seller page describes a Pro account requirement and a 20% sales commission. Confirm the Pro subscription cost and what the percentage includes before modeling proceeds. The MCP Market comparison separates discovery from the seller workflow.

SkillHQ: a documented package and CLI workflow

SkillHQ's seller guide describes preparing SKILL.md and README files, validating a package, publishing it, and releasing updates. Its buying guide describes one-time purchases and CLI installation.

This makes the local package lifecycle relatively concrete in the documentation. Seller tiers differ, so verify the route your account will actually use. The SkillHQ comparison covers the distinction between an installed edition and managed access.

Sigrix: a broader catalog of AI products

Sigrix's skills marketplace sits alongside categories for prompts, personas, agents, and other products, with seller and publication routes. That broader context may suit a creator whose skill belongs in a larger product line.

The category name does not settle what a buyer receives. Open the actual listing and applicable seller terms. See Sigrix versus Skillfully for the implications of catalog sales versus maintaining an author method.

Capafy: choose execution or download deliberately

Capafy's publisher documentation calls the underlying package a Skill and the listed product a Skill-based Agent. Its guide separates run and download models and provides sections on review, pricing, settlement, and versions.

That distinction is useful for a seller whose product might require execution infrastructure. Compare the costs and obligations of each route, rather than treating hosted use as a free addition to a file. Read Capafy versus Skillfully for a closer model comparison.

VibeFuse: an ecosystem-specific distribution question

Fuse Intelligence's selling page describes selling skills and widgets, using Stripe Connect for paid listings, and synchronizing purchases into VibeFuse. The relevant question is whether your intended buyers use that environment.

An integrated distribution route may be useful for those customers while being less relevant to an audience working elsewhere. The VibeFuse comparison considers that audience and delivery tradeoff.

SkillExchange: examine the executable capability model

SkillExchange presents itself as a beta marketplace for MCP and A2A capabilities, with Stripe-based payments and usage-oriented examples. This is a different emphasis from selling a standalone instruction file.

Treat the published transaction and revenue descriptions as vendor claims until you verify your seller journey. Clarify the applicable plan rather than extracting one percentage from a page with multiple tiers. Read SkillExchange versus Skillfully before comparing the products solely on the word “skill.”

PromptSpace Skills: free distribution is a separate goal

Indexed first-party PromptSpace catalog material describes skills as free to install. Access to the catalog was inconsistent during this review, so we do not treat it as evidence of a working paid seller path.

Free distribution can still serve sampling, education, and reputation. It is a different objective from receiving payment for each installation. The PromptSpace comparison explains the evidence limits and the free-versus-paid decision.

iuseagent: resolve explicit readiness caveats

iuseagent's seller page describes package publication, but its pricing page labels pricing as provisional and says checkout and payout work are deferred. That discrepancy is material for a paid launch.

It may reflect incomplete or stale public documentation. It is not proof of a failed transaction. Ask the operator to demonstrate the current route and identify governing terms. The iuseagent comparison provides a focused readiness worksheet.

Skillfully: bring a method and an audience

Skillfully is an application-based route for established authors and experts selling maintained access to their method. It is explicitly not an open discovery marketplace. Its fit is an ongoing relationship with readers you can reach.

That can be attractive when method improvement and feedback matter more than catalog placement. It is a constraint when you want unrestricted self-service listing or rely on the platform to find your first audience. Discuss your intended offer and supported client journey during onboarding.

For a practical shortlist, write one non-negotiable condition in each row below. Score only after obtaining evidence. An unknown is not the same as a pass or a failure.

For example, a developer selling a stable local code-review package might prioritize CLI installation and edition updates. An author helping readers repeatedly apply a negotiation method might prioritize managed access, feedback, and a direct relationship. Neither should inherit the other's priorities just because both products contain instructions.

Ask the shortlisted provider for the current seller rules, price calculation, delivery flow, refund process, and settlement conditions. Use an authorized test where available. Retain the product version and buyer state so that later changes can be compared honestly.

Do not forecast sales from catalog size or claim universal compatibility from a protocol label. A good commercial pilot connects the promise to a first useful result and exposes the support burden. Our guide to selling SKILL.md packages turns that work into a step-by-step checklist.

If billing cadence remains the main uncertainty, compare one-time skill sales and subscriptions. Choose the channel after the product, buyer, and continuing obligation are clear enough to test.