Vokko Multi-Protocol Host Probe

x402

Vokko Multi-Protocol Host Probe 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).

Probes a domain and returns which agent-web protocols (UCP, ACP, AP2, TAP, MCP, A2A, x402, MPP, llms.txt, OpenAPI) are present, absent, or callable

Price / call$0.02

Seller volume →—

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

A JSON object containing the domain, a timestamp of when it was probed, and an array of protocol entries (e.g. UCP, ACP, AP2, TAP, MCP, A2A, x402, MPP, llms.txt, OpenAPI), each with its detection status: 'present', 'absent', or 'callable'.

Example use cases

Vetting a vendor for agent integration

“Before I build an integration, check whether notion.com has MCP or A2A support — I need to know which agentic protocols are actually live there.”

Discovering x402 payment support

“Does shopify.com support x402 payments? Probe it and tell me if the payment rail is callable or just declared.”

Auditing a new API partner for protocol coverage

“I'm evaluating github.com as an agent-web partner — scan it for UCP, OpenAPI, llms.txt, and any other agent protocols and show me what's present versus absent.”

Technical details

Endpoint

GEThttps://www.vokko.eu/api/v1/hosts/%7Bdomain%7D?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a single call that checks a host against the full spectrum of agent-web protocols simultaneously — rather than querying each protocol endpoint separately or using a cached report endpoint. Prefer this for fresh, live detection of MCP, A2A, x402, UCP, llms.txt, and OpenAPI in one result.

Side effects

Domain does not exist or is unreachable — probe may return all protocols as absent or return an error
Firewall or rate-limiting on the target host blocks the probe — status may be inaccurate
Malformed domain input returns a 400 or path-not-found error
Stale or cached results if re-probe was not explicitly triggered
x402 payment failure prevents the probe from being executed

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"
      }
    ]
  }
}

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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

Example use cases

Vetting a vendor for agent integration

“Before I build an integration, check whether notion.com has MCP or A2A support — I need to know which agentic protocols are actually live there.”

Discovering x402 payment support

“Does shopify.com support x402 payments? Probe it and tell me if the payment rail is callable or just declared.”

Auditing a new API partner for protocol coverage

“I'm evaluating github.com as an agent-web partner — scan it for UCP, OpenAPI, llms.txt, and any other agent protocols and show me what's present versus absent.”

Technical details

Endpoint

GEThttps://www.vokko.eu/api/v1/hosts/%7Bdomain%7D?utm_source=zero.xyz

When to prefer

Side effects

Domain does not exist or is unreachable — probe may return all protocols as absent or return an error
Firewall or rate-limiting on the target host blocks the probe — status may be inaccurate
Malformed domain input returns a 400 or path-not-found error
Stale or cached results if re-probe was not explicitly triggered
x402 payment failure prevents the probe from being executed

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"
      }
    ]
  }
}