# CONNSKILL Trust Check — x402 Service Reputation Lookup

> CONNSKILL Trust Check — x402 Service Reputation Lookup is a paid API for AI agents from agent.connskill.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).

Checks the on-chain payment reputation and liveness of an x402-compatible API endpoint, returning a trust verdict for AI agents before they pay.

## Facts

- Endpoint: POST https://agent.connskill.com/v1/trust-check
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/connskill-trust-check-x402-service-reputation-lookup-fa0912fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AATdaTj5R-cUxDsqhnfgg

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 connskill-trust-check-x402-service-reputation-lookup-fa0912fa -d '<json body>'
```

Example prompt: Before I pay that x402 API, run a trust check on agent.connskill.com — I want to see if it has real payers, how much USDC has flowed through it recently, and whether it gets a green verdict.

## When to prefer this

Use this endpoint when an AI agent needs to assess the trustworthiness of an x402-compatible pay-per-call service before spending USDC. It is the right choice when you want both on-chain payment history (real payer diversity, inflow volume, self-dealing detection) and live probe validation (is the endpoint up, x402-spec-compliant, and on the right network) in a single call. Prefer it over manual on-chain inspection or generic uptime monitors when operating in an agentic, automated payment context on Base.

## Known failure modes

- Unknown or unreachable origin host — returns error or non-green verdict
- x402 probe fails if the target service is offline or returns non-402 responses
- Self-dealing share flagged as high — verdict may be 'yellow' or 'red' even if service is live
- No on-chain payment history found — payer count zero, inflow zero, verdict likely 'red'
- Invalid input: origin string too short or malformed hostname causes validation error

## How this service works

Market data and real-world actions for AI agents: keyword and SERP research by location, SMS verification, receive-only inboxes, social marketing, EU-hosted LLMs. Paid per call in USDC on Base. No account, no API key, no minimum.

## Output

Returns a JSON object with a top-level verdict ('green', 'yellow', or 'red'), on-chain chain stats (number of unique payers, total USDC inflow, window in days, self-dealing share, self-dealing payer count), probe results (payTo address, HTTP latency in ms, EIP-155 network, x402_valid boolean, x402 version), the origin URL, and a status field.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "origin": {
   "type": "string",
   "minLength": 4,
   "description": "Bare host of the x402 service to check, e.g. agent.connskill.com"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": {
   "payers": 3,
   "inflowUsdc": 6.87,
   "windowDays": 14,
   "selfDealingShare": 0.31,
   "payersSelfDealing": 1
  },
  "probe": {
   "payTo": "0x43B8...",
   "http_ms": 240,
   "network": "eip155:8453",
   "x402_valid": true,
   "x402Version": 2
  },
  "origin": "https://agent.connskill.com",
  "status": "delivered",
  "verdict": "green"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/connskill-trust-check-x402-service-reputation-lookup-fa0912fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.connskill.com](https://www.zero.xyz/host/agent.connskill.com/llms.txt)