# AgentResolver — x402 Payment Preflight & PayTo Verification

> AgentResolver — x402 Payment Preflight & PayTo Verification is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-14).

Verifies an x402-protected endpoint before payment by checking the live payTo address, USDC quote, network, asset, resource binding, TLS, and endpoint safety.

## Facts

- Endpoint: GET https://agentresolver.vercel.app/api/provider-launch-check?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentresolver-x402-payment-preflight-payto-verification-67900357
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AOLs0zKzpWXNZ3lSX3Of9

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-x402-payment-preflight-payto-verification-67900357
```

Example prompt: Before my agent pays this x402 endpoint, run a preflight check on it — verify the payTo address is live, confirm the USDC quote and network (Base or Solana), and make sure the TLS and resource binding look safe.

## When to prefer this

Use this endpoint whenever an AI agent is about to pay an x402-protected resource and needs to confirm the payment details are legitimate before committing funds. It is especially valuable when integrating unknown or third-party x402 APIs, detecting potential payment fraud, or auditing x402 configurations across Base and Solana networks. Prefer this over blind payment when safety, correctness of payTo address, or USDC quote accuracy is important.

## Known failure modes

- Invalid or unreachable x402 endpoint URL returns an error or empty result
- PayTo address fails liveness check, flagged as invalid or unresolvable
- TLS certificate is expired or missing, endpoint flagged as unsafe
- Network or asset mismatch detected between expected and actual x402 headers
- Endpoint does not return valid x402 payment headers, verification cannot proceed
- Service itself unavailable or returns 5xx, preflight result indeterminate

## How this service works

Continuously check whether AI agents can discover, call and pay your API, MCP server or x402 service. Free live checks and GitHub Action monitoring.

## Output

Returns a structured report including: validity of the payTo address, current USDC quote, network (Base or Solana), asset type, resource binding confirmation, TLS certificate status, and an overall endpoint safety assessment — allowing an agent to decide whether it is safe to proceed with payment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentresolver-x402-payment-preflight-payto-verification-67900357/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)