Arc Agent Watch

Which agents registered on Arc actually answer.

Overview

Which agents registered on Arc actually answer. Every endpoint every agent lists in its ERC-8004 registration file (web, A2A, MCP, x402, the file itself) is called once an hour through an address-checked fetcher: A2A cards are read, MCP servers get the initialize handshake, x402 paywalls are parsed the way a standard client would and checked against the on-chain EIP-712 domains of USDC and EURC on Arc (a wrong domain means every signature fails - we name it). Returns every agent with its status (up, degraded, down, not checked, listed without endpoints, no file), uptime over 24 hours and 7 days counted only over hours actually measured, response times, each endpoint's last answer, the hour-by-hour history, whether it can be paid on Arc and how, domain verification, and a plain-words fix list. The free board at /api/arc/watch has one summary row per agent.

Endpoint

Method	Endpoint	Price	Description
GET	/v1/marketplace/api/arc-agent-watch	$0.0046	Invoke Arc Agent Watch (Dns) and return the upstream response.

How to call it

Requests are paid per call over the x402 protocol. Call the endpoint, receive a 402 Payment Required quote, then repeat the request with the signed payment header. The SDKs do both steps for you.

# 1. Ask for a quote
curl -i https://api.jarvisclaw.ai/v1/marketplace/api/arc-agent-watch

# 2. Pay it (the SDK signs and retries for you)
curl -H "X-PAYMENT: <signed-payload>" https://api.jarvisclaw.ai/v1/marketplace/api/arc-agent-watch

Open in the marketplace