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x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and

x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and payable before you spend. Use before paying an unknown endpoint, or to monitor your own. Makes one unpaid request and returns H

1 route settlement-verified · $0.001 USDC/request · 1 endpoint · Data · base network · x402 protocol

Verified routes

Other routes are unverified.

Networks: Base (settlement-verified)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider
a-un
Hosted at
a-upgradenet.com
Category
Data
Price
$0.001 USDC per request
Endpoints
1
Payment networks
Base
Settlement-verified
1 route, last checked 2026-11-01
Listed on PayAPI Market
2026-11-01

Try x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and

Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.

curl -i -X POST "https://a-upgradenet.com/x402/endpoint-check (a-un web-read route)"

About this API

x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and is listed in the Data category with pricing at $0.001 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-11-01. View receipt on Basescan.

Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.

This API exposes 1 endpoint.

Questions about this API

What does x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and do?

x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and payable before you spend. Use before paying an unknown endpoint, or to monitor your own. Makes one unpaid request and returns H It is provided by a-un.

How much does x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and cost?

x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and is priced at $0.001 USDC per request, paid per call with no subscription. Verified with a $0.001 test payment on 1 Nov 2026. The exact amount for each call is in the HTTP 402 response before any money moves.

Do I need an API key or account to use x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and?

No. x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and been verified?

Yes, 1 route. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-11-01.

How does an AI agent find x402 Endpoint Check: verifies that a seller's x402 endpoint is alive and?

Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.

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