# AgentResolver x402 CDP Canary Settlement Test

> AgentResolver x402 CDP Canary Settlement Test is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-14).

Performs a live end-to-end x402 micropayment settlement test, verifying buyer wallet, USDC payment path, and facilitator by returning a timestamped pong only after successful on-chain settlement.

## Facts

- Endpoint: GET https://agentresolver.vercel.app/api/x402-cdp-canary?utm_source=zero.xyz
- Price: $0.002/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-cdp-canary-settlement-test-28178153
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2HxkeLcohRDFn8st2pXiR

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-cdp-canary-settlement-test-28178153
```

Example prompt: Run a live x402 canary settlement test to confirm my funded agent wallet can complete a USDC micropayment end-to-end — echo back the word 'healthcheck' so I know the paid response came through.

## When to prefer this

Use this endpoint when you need to verify that a complete x402 micropayment stack — including buyer wallet, USDC balance, facilitator routing, and paid content delivery — works correctly end-to-end. It is the canonical canary/smoke-test for x402 CDP agents, costing only $0.002 USDC per call. Prefer this over preflight-only checks when you need to confirm actual settlement and paid delivery, not just payment requirements.

## Known failure modes

- Insufficient USDC balance in buyer wallet — payment rejected before settlement
- Invalid or misconfigured facilitator — settlement fails with payment error
- Wallet not funded or not on correct network — 402 Payment Required returned without delivery
- Echo parameter exceeds 256 characters — request rejected
- Network congestion or blockchain latency — settlement timeout
- TLS or endpoint verification failure — connection refused

## How this service works

No-body $0.001 x402 settlement test for funded agents. Verifies the buyer wallet, facilitator, USDC payment path, and paid delivery end-to-end by returning a timestamped pong only after successful settlement.

## Output

Returns a JSON object with `pong: true` and `settledDelivery: true` only after the USDC micropayment has been successfully settled on-chain. Also echoes back any optional text provided via the `echo` query parameter, and includes a timestamp confirming the moment of paid delivery.

## 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": {
      "echo": {
       "type": "string",
       "maxLength": 256,
       "description": "Optional text echoed by the paid settlement response."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "pong",
      "settledDelivery"
     ],
     "properties": {
      "pong": {
       "type": "boolean",
       "const": true
      },
      "settledDelivery": {
       "type": "boolean",
       "const": true
      }
     },
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentresolver-x402-cdp-canary-settlement-test-28178153/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)