# AgentResolver MCP Probe — Capability Routing for AI Agents

> AgentResolver MCP Probe — Capability Routing for AI Agents is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-18).

Probes a given endpoint URL to discover, resolve, and return its machine-readable capability metadata for AI agent routing

## Facts

- Endpoint: POST https://agentresolver.vercel.app/api/mcp-probe
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentresolver-mcp-probe-capability-routing-for-ai-agents-1eb4d5c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pCUHJFzKWxl2eJzOnlmPX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentresolver-mcp-probe-capability-routing-for-ai-agents-1eb4d5c4 -d '<json body>'
```

Example prompt: Probe the endpoint at https://example.com/api/my-service and tell me what capabilities it exposes — what it does, what inputs it needs, and what it returns.

## When to prefer this

Use this endpoint when you need to discover the capabilities, schema, or pricing of an unknown or unfamiliar API endpoint before calling it — especially within x402-compatible or MCP-based agent ecosystems. Prefer this over manual documentation lookup when building dynamic agent routing pipelines that need to self-discover available tools at runtime.

## Known failure modes

- Endpoint URL is unreachable or returns no 402/capability response — metadata may be empty or error returned
- Endpoint does not conform to x402 or MCP capability conventions — limited or null metadata returned
- Invalid or malformed endpoint URL in input — validation error
- Probed service returns unexpected format — partial metadata only
- Network timeout on probe — may return no result or timeout error

## How this service works

Verify an x402 endpoint before paying: live payTo, USDC quote, network, asset, resource binding, TLS and endpoint safety for $0.001 on Base or Solana.

## Output

Returns structured capability metadata about the probed endpoint, including what the service does, its input/output schema, pricing information, and routing-relevant details that help an AI agent decide whether and how to call the service.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "endpoint": {
   "type": "string",
   "pattern": "^https://",
   "maxLength": 500
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentresolver-mcp-probe-capability-routing-for-ai-agents-1eb4d5c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentresolver.vercel.app](https://www.zero.xyz/host/agentresolver.vercel.app/llms.txt)