x402 Bazaar alternatives
An x402 Bazaar alternative is another public place an agent can look up a paid API. The Coinbase CDP Bazaar catalogues services its facilitator has settled. PayAPI Market is an x402 marketplace and an AI agent API marketplace with a different check: we pay one route and link the receipt. Listing is free and providers keep 100%.
Last updated: 30 October 2026
What is the Coinbase CDP Bazaar?
Coinbase documents the x402 Bazaar as discovery for services catalogued through the CDP Facilitator. Indexing follows a settled payment. A verify step alone is not enough. Buyers can page the catalogue, search it, or use MCP. An endpoint can speak x402 and still be absent until that path settles. See the CDP discovery docs.
That is a real index, and it is tied to one facilitator. An endpoint can speak x402 and still be absent until a payment settles through that path. Agents that only search the Bazaar will not see every payable API. The public docs are the source for this paragraph, and the table below links them.
Why is there more than one x402 catalogue?
Builders already publish in more than one place. The schemas differ and the checks differ, so a seller who wants to be found has to learn each one. This page does not ask anyone to list in only one marketplace. It says what each public alternative claims, so an agent can pick a source on purpose.
PayAPI Market is one of those places. It is an x402 marketplace for people who want a human-readable AI agent API marketplace as well as a machine catalogue. We review a listing, pay one cheap call on one route from our own wallet, and publish the receipt. A live listing that we have not paid is still findable. It is not described as settlement-verified.
The same catalogue query that writes llms.txt currently counts 1,134 settlement-verified APIs, 2,331 listed.
How should an agent compare x402 Bazaar alternatives?
Ask three questions. Who can appear? What was tested? Can the agent read the price, the network and the payTo address before it pays? A 402 probe, a facilitator settlement and a PayAPI receipt are different facts. How we verify puts them side by side. Do not mix the counts.
Price comes first either way. On a PayAPI listing the unpaid 402 states the price, the network and the payTo address before any payment is made. Paying for APIs without an API key is the long version of that loop, including Base, Solana and Algorand.
How do the public alternatives differ?
Each row links to a public page opened on the date in the last column. The wording is what that page supports. We do not reprint another site's totals here. PayAPI Market is an x402 marketplace where listing is free and providers keep 100%. The receipt rule is on how we verify.
| Place | What the public page says | Source | Checked on |
|---|---|---|---|
| Coinbase CDP Bazaar | Discovery catalogue for services indexed through the CDP Facilitator. Indexing follows a settled payment. Agents can search over HTTP or MCP. | CDP buyer discovery docs | 30 October 2026 |
| Agent Bazaar | An open discovery catalogue for x402-payable services, described as wire-compatible with Coinbase's discovery API, with an MCP server over the same data. Listing does not require an account. | Agent Bazaar reference | 30 October 2026 |
| SwarmBazaar | A directory of companies, protocols and paid endpoints across x402, MCP and other agent protocols, with price and reachability notes. The homepage invites providers to list for free. | SwarmBazaar | 30 October 2026 |
| Access402 | A seller-side way to describe a resource once and publish it to the CDP Bazaar and other discovery channels. The article presents it as distribution, not as a separate buyer catalogue. | Access402 on Bazaar discovery | 30 October 2026 |
| PayAPI Market | An x402 marketplace and AI agent API marketplace. Settlement-verified means we paid one route and linked the receipt. Listing is free and providers keep 100%. | How we verify | 30 October 2026 |
Where should an agent start?
Start at the agent guide or the x402 API directory and read get_api before you call. For MCP tools, use pay-per-call MCP tools. Sellers submit the paid route, keep 100% of what callers pay, and we pay for the verification call ourselves.
Frequently asked questions
What is an x402 Bazaar alternative?
It is another public catalogue where an agent can discover APIs that accept x402 payments. The Coinbase CDP Bazaar is one. PayAPI Market, Agent Bazaar, SwarmBazaar and seller-side publishers such as Access402 are others. They do not share one check.
Is PayAPI Market the same as the CDP Bazaar?
No. The CDP Bazaar catalogues services indexed through the CDP Facilitator after a payment settles. PayAPI Market is an x402 marketplace that pays one named route from its own wallet and links the receipt. An API can appear in more than one catalogue.
Do I have to list in only one place?
No. Providers often publish in more than one directory. PayAPI Market does not ask for an exclusive listing. Listing here is free and you keep 100% of each paid call.
How do I know the price before I call?
On PayAPI Market the unpaid 402 states the price, the network and the payTo address before any payment is made. get_api also returns the listing price range, which is read from that live 402.
Which figure should I quote for the size of PayAPI Market?
Quote the live line in llms.txt. It states the settlement-verified count first and the number listed second, from the same query as this site. A 402 check is a different count and is labelled as such. This page does not freeze either number.
Sources
- CDP buyer discovery docs
- Agent Bazaar reference
- SwarmBazaar
- Access402 on Bazaar discovery
- How we verify
- PayAPI Market llms.txt
Related: marketplace · for agents · FAQ · how we verify
A dated comparison of public x402 Bazaar alternatives. PayAPI Market is an x402 marketplace where listing is free and providers keep 100%.