[Home](https://aixpa.store/) › FAQ FAQ # Questions and answers Short answers for shops, sites, advertisers and developers. Every fee, share and limit is read from the live API. [Shops](https://aixpa.store/faq#shops) [Sites](https://aixpa.store/faq#sites) [Ads](https://aixpa.store/faq#ads) [Devs](https://aixpa.store/faq#devs) ## For shops and merchants ### What does Aixpa charge on a payment? The hub keeps 0.5% of each payment to a project. There is no monthly fee and no setup fee, and gateway and network fees are passed on at cost. [See pricing](https://aixpa.store/pricing). ### Which coins can I accept? Today the hub takes 12 coins through 21 payment methods. It picks the route by itself and moves to the next gateway when one fails. [See the features](https://aixpa.store/features). ### What is the smallest payment? A payment by invoice or to a permanent address starts at $1. Through FaucetPay it starts at $0.10. [Read how payments move](https://aixpa.store/whitepaper). ### How does my site learn that a payment arrived? The hub sends your site a signed webhook. A repeated confirmation or a webhook retry cannot credit the same payment twice. [Open the integration guide](https://aixpa.store/integration). ### Can a crypto payment be refunded? A confirmed crypto payment cannot be pulled back. A payment that arrives too small, late or twice is credited for what arrived, or held until a person has reviewed it. [Read the refund policy](https://aixpa.store/refunds). ### Show more questions ### How do I withdraw my balance? A project withdraws to FaucetPay or on-chain. A payout is from $0.05 to $50, up to $200 a day per balance, and the payout fee is $0. [Read how payouts work](https://aixpa.store/whitepaper). ### Does topping up an account cost anything? The fee on a top-up of an account balance is 0%. The balance can then fund ad campaigns. [Read the advertiser policy](https://aixpa.store/advertiser-policy). Related: [Pricing](https://aixpa.store/pricing) · [Status](https://aixpa.store/status) ## For sites and publishers ### How much of the ad spend does a publisher get? A publisher gets 70% of what advertisers spend on its zones, and the hub keeps 30%. [See pricing](https://aixpa.store/pricing). ### What do offers pay a publisher? A publisher gets 70% of each offer payout from a partner offerwall. [Read the publisher terms](https://aixpa.store/publisher-terms). ### Which banner sizes are there? Banner zones come in 728×90, 300×250, 468×60, 320×50. A publisher places one script and marks the slots. [Open the integration guide](https://aixpa.store/integration). ### When is my share credited? The share is credited to the project balance as valid events arrive. A view or click that fails the traffic checks is not paid. [Read the publisher terms](https://aixpa.store/publisher-terms). ### What happens to invalid traffic? A project that sends invalid traffic can be suspended, and earnings found invalid later are taken back. [Read the acceptable use policy](https://aixpa.store/acceptable-use). ### Show more questions ### Can an offer be taken back after it paid? Yes. A network can reverse an offer after it paid. The reversal reaches your webhook and the publisher's share of that offer leaves the balance. [Read the publisher terms](https://aixpa.store/publisher-terms). ### How much will I earn? It depends on real visitors. The hub promises no amount, and nothing on this site is financial, legal or tax advice. [Read what is not promised](https://aixpa.store/whitepaper). Related: [Pricing](https://aixpa.store/pricing) · [Network stats](https://aixpa.store/stats) ## For advertisers ### Which campaign types can I run? PTC, banner, text and new-tab campaigns, all paid from one account balance. Each campaign has a daily cap. [Read the advertiser policy](https://aixpa.store/advertiser-policy). ### What is the lowest bid? A PTC view starts at $0.001. Per 1,000 views, banners start at $0.10 and text at $0.05. Per 1,000 new tabs the lowest bid is $0.50. [See pricing](https://aixpa.store/pricing). ### Does a top-up cost anything? The fee on a top-up of your account balance is 0%. The whole amount becomes campaign budget. [See pricing](https://aixpa.store/pricing). ### Does a person check my campaign? Yes. A person reviews every campaign before it runs. [Read what an ad may promote](https://aixpa.store/advertiser-policy). ### Am I billed for bad traffic? No. Every view and click passes checks before it is charged, and one that fails is not billed. [Read how the hub guards money](https://aixpa.store/whitepaper). ### Show more questions ### How long must a PTC ad be viewed? You set the view time from 5 to 60 seconds. The viewer must stay that long before the view counts. [Read the advertiser policy](https://aixpa.store/advertiser-policy). ### What do I get for my budget? It depends on the bid you set and on real traffic, and the hub promises no results. [Read what is not promised](https://aixpa.store/whitepaper). Related: [Advertiser policy](https://aixpa.store/advertiser-policy) · [Pricing](https://aixpa.store/pricing) ## For developers ### How do I connect a site? One API gives a site wallet sign-in, crypto payments, webhooks, payouts and ad zones. [Open the integration guide](https://aixpa.store/integration). ### Where do I read the fees as data? Every fee, share and limit on these pages is served as JSON by the facts endpoint of the API, with no key. [Read the agent guide](https://aixpa.store/docs/agents). ### Can an AI agent use Aixpa? An agent can read the pages as Markdown, the llms.txt file, an OpenAPI description and a read-only MCP endpoint without a key. [Read the agent guide](https://aixpa.store/docs/agents). ### Can a webhook credit a payment twice? No. One payment is one ledger entry, so a repeated confirmation or a retry cannot credit it twice. [Read how the ledger works](https://aixpa.store/whitepaper). ### How do I see if something is down? The status page shows every component, such as the API, the payment gateways and each sign-in method, refreshed every minute. [Open the status page](https://aixpa.store/status). ### Show more questions ### What are the payout limits? A payout is from $0.05 to $50, and a balance can pay out $200 a day. [Read how payouts work](https://aixpa.store/whitepaper). ### Which modules are available? Each module shows its status, Live, Beta or Planned. A module marked Planned is not available yet. [See the features](https://aixpa.store/features). Related: [Integration guide](https://aixpa.store/integration) · [AI agents](https://aixpa.store/docs/agents) [Create free account](https://aixpa.store/signup)