x4PayAPI Market

PayAPI Market in Cursor

Cursor uses the same PayAPI Market MCP server as Claude Desktop. Paste the block on this page into the MCP config and restart. The keys are mcpServers, payapi and url, and the url is https://payapi.market/mcp. That is the block already printed on the agents page. There is no Cursor-only key. The server exposes four tools. search_apis, list_apis and get_api are read-only. submit_listing is free, rate limited, and it goes to pending review rather than straight onto the site. Finding an API does not spend USDC. Spending happens when the agent calls the provider and pays over x402 in USDC on Base, Solana or Algorand, with no API key. Settlement-verified means a paid route with an on-chain receipt. The examples are claimed verified listings from the live catalogue, the sort of row get_api returns. Unclaimed (bazaar) imports are labelled and are not those examples. Listing is free and the provider keeps 100% of each settled call.

1042 APIs and 6311 endpoints match this page. 1031 are settlement-verified: a paid route with an on-chain receipt.

MCP config

Add this to the Cursor MCP config and restart Cursor. It is the same block Claude Desktop uses.

{
  "mcpServers": {
    "payapi": {
      "url": "https://payapi.market/mcp"
    }
  }
}

What the four tools do

How paying works

The MCP server does not charge and it does not return HTTP 402. The agent pays the provider over x402 in USDC on Base, Solana or Algorand. No API key. Settlement-verified means a paid route with an on-chain receipt.

Settlement-verified examples

Unclaimed (bazaar) imports

These rows were imported and the provider has not claimed them. They are not the examples above.

Related pages

Questions

What MCP config does Cursor need?

The same JSON as Claude Desktop: mcpServers, with payapi, with url https://payapi.market/mcp. Add it to the MCP config and restart. No extra keys.

Which tools show up in Cursor?

search_apis, list_apis, get_api and submit_listing. The first three are read-only. submit_listing is free, rate limited, and it goes to pending review. It does not set payment_verified.

How does a call get paid from Cursor?

The MCP server only finds the listing. The agent pays the provider over x402 in USDC on Base, Solana or Algorand. No API key. Settlement-verified means a paid route with an on-chain receipt.