# Coin Railz KYA Verified Agent Identity

> Coin Railz KYA Verified Agent Identity is a paid API for AI agents from coinrailz.com, paid per call via x402, $5/call, status unknown (last checked 2026-09-15).

Verifies AI agent identity and computes on-chain reputation and compliance scores using the ERC-8004 standard

## Facts

- Endpoint: POST https://coinrailz.com/x402/service/verified-agent-identity
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coin-railz-kya-verified-agent-identity-erc-8004-ddf9df66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QF76WiVeUiXnpJpiVS_fX

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 coin-railz-kya-verified-agent-identity-erc-8004-ddf9df66 -d '<json body>'
```

Example prompt: Can you verify the identity and reputation score of my AI agent with agent ID 'agent-abc123' and wallet address '0x4Ae8f4a2B3C1d5e6F7890aB12cd34EF56gh78IJ' using the KYA on-chain verification system?

## When to prefer this

Use this endpoint when you need to establish or verify the identity and trustworthiness of an autonomous AI agent before granting it permissions, executing high-value transactions, or onboarding it into a multi-agent system. It is specifically suited for ERC-8004-standard KYA compliance workflows in Web3 environments where on-chain reputation matters.

## Known failure modes

- Invalid or malformed wallet address returns validation error
- Unknown agentId not found in on-chain registry returns unverified status
- Missing required fields (agentId or walletAddress) returns 400 bad request
- Invalid signature format causes authentication rejection
- Blockchain network congestion may delay reputation score computation
- Agent not yet registered on-chain returns empty or null NFT address

## How this service works

KYA (Know-Your-Agent) identity verification - On-chain reputation & compliance scoring using ERC-8004 standard (Premium B2B2C Infrastructure)

## Output

Returns a boolean verification status, the ERC-8004 identity NFT contract address assigned to the agent, and a numeric on-chain reputation score reflecting the agent's compliance and behavioral history.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "agentId",
  "walletAddress"
 ],
 "properties": {
  "agentId": {
   "type": "string",
   "description": "AI agent identifier"
  },
  "metadata": {
   "type": "object",
   "description": "Agent metadata for reputation scoring"
  },
  "signature": {
   "type": "string",
   "description": "Optional signature for enhanced verification"
  },
  "walletAddress": {
   "type": "string",
   "description": "Wallet address to verify"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "verified": {
   "type": "boolean",
   "description": "Verification status"
  },
  "identityNFT": {
   "type": "string",
   "description": "ERC-8004 identity NFT address"
  },
  "reputationScore": {
   "type": "number",
   "description": "On-chain reputation score"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coin-railz-kya-verified-agent-identity-erc-8004-ddf9df66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinrailz.com](https://www.zero.xyz/host/coinrailz.com/llms.txt)