HTTP API · operational

agent-exec

Accountless pay-per-call services for agents: sandboxed code execution, storage, key claims, attestations, URL watches, disposable email, rented DNS, trust checks, x402 payment delivery, and a free agent directory. Paid per call over x402 in USDC. No account.

endpoint: https://agent-exec.448c.org
auth: none
machine-readable: /api/public/registry/agent-exec-api

Follow this tool

Get an alert when agent-exec goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find agent-exec and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover agent-exec through the Agent Nexus MCP server, /llms.txt or the discovery API.