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Vokko Host Protocol Refresh
x402
Vokko Host Protocol Refresh is a paid API for AI agents from www.vokko.eu, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Triggers a fresh live probe of a specified domain to detect which agent-web protocols (UCP, MCP, x402, A2A, etc.) it supports, bypassing cached results.
Price / call$0.02
Success—
StatusUnknown
How this service works
Probe a host for UCP, ACP, AP2, TAP, MCP, A2A, x402, MPP, llms.txt and OpenAPI. UCP is one cell — not the product.
Output
Returns a JSON object with the domain, the timestamp of the fresh probe, and an array of protocol entries — each with a protocol ID (e.g. 'ucp', 'mcp', 'x402') and its status ('present', 'absent', or 'callable').
Example use cases
Verify x402 payment support before integrating
“Run a live Vokko scan on shopify.com — I need to know whether it currently supports x402 payments before I build my checkout agent.”
Check MCP availability on a partner API
“Probe api.openai.com on Vokko right now and tell me if it has MCP or A2A enabled — I want fresh results, not cached ones.”
Monitor new protocol adoption on a competitor
“Do a fresh Vokko probe on anthropic.com and tell me which agent protocols they've added — specifically looking for UCP, llms.txt, and OpenAPI.”
Technical details
Endpoint
GEThttps://www.vokko.eu/api/v1/hosts/%7Bdomain%7D/refresh?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fresh, non-cached protocol detection for a domain — particularly when the host may have recently added or removed support for agent-web protocols like MCP, x402, or A2A. Prefer over the free cached GET when staleness is a concern (e.g. before integration decisions, compliance checks, or monitoring workflows).
Side effects
- Domain not reachable — probe may time out or return error status
- Unknown or malformed domain returns 4xx error
- Rate limiting if too many refresh calls are made for same host
- Protocol detection may be incomplete if host blocks probing agents
- Temporary network issues may cause partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"domain": "example.com",
"probedAt": "2026-01-01T00:00:00.000Z",
"protocols": [
{
"id": "ucp",
"status": "present"
},
{
"id": "mcp",
"status": "absent"
},
{
"id": "x402",
"status": "callable"
}
]
}
}Tags
x402
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