# Polygon Address Chain Validator

> Polygon Address Chain Validator is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Validates whether a given address is a valid Polygon network address for a specified chain ID (mainnet or testnet)

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/polygon_address_chain_validate/invoke
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polygon-address-chain-validator-76b0896b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KdWfZ4jfqfpkwtk0VQL0P

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 polygon-address-chain-validator-76b0896b -d '<json body>'
```

Example prompt: Can you validate whether 0x0000000000000000000000000000000000000001 is a valid address on the Polygon PoS mainnet (chain ID 137)?

## When to prefer this

Use this endpoint when you need a lightweight, cost-effective check that a given address conforms to Polygon network address standards for mainnet (chain 137) or testnet (chain 80002). Prefer this over general EVM validators when you specifically need Polygon-aware network context, protocol family info, and bridge model details. Note: this validates address format and chain compatibility only — it does not verify ownership, contract existence, or account activity.

## Known failure modes

- Invalid or malformed address format returns validation failure
- Unsupported chain ID returns error or undefined network context
- Malformed request_json input may return a parsing error
- Network unavailability may cause timeout or service error

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## Output

Returns a JSON object containing: the validated address, chain ID, network name (e.g. polygon_pos_mainnet), network context (accepted chain IDs, bridge model, completion policy, protocol family), a boolean 'valid' field, warnings (e.g. that validation does not prove ownership or account existence), and the evidence scope. Also includes a receipt with payment metadata, execution timing, and a result hash.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "request_json": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 2
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Does not prove ownership, code, or account existence."
   ],
   "service_id": "polygon_address_chain_validate",
   "analysis_json": "{\"address\":\"0x0000000000000000000000000000000000000001\",\"chain_id\":\"137\",\"network\":\"polygon_pos_mainnet\",\"network_context\":{\"accepted_chain_ids\":[\"137\",\"80002\"],\"bridge_model\":\"root-child state sync plus checkpoint evidence\",\"completion_policy\":\"never inferred without supplied evidence\",\"protocol_family\":\"Polygon PoS\"},\"valid\":true}",
   "evidence_scope": "caller_supplied_data",
   "analyzed_network": "polygon"
  },
  "status": "succeeded",
  "receipt": {
   "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
   "usage": [],
   "status": "succeeded",
   "network": "eip155:8453",
   "artifacts": [],
   "endedAtMs": 0,
   "latencyMs": 0,
   "paymentId": "example-payment",
   "receiptId": "example-receipt",
   "requestId": "example-request",
   "serviceId": "polygon_address_chain_validate",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "5000",
   "resultSha256": "82500ceccca712d7c113c1adcd6087ac40d944332f8549c2b50b768846c5f1ff",
   "serviceVersion": "1.0.0",
   "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "artifacts": [],
  "requestId": "example-request",
  "executionId": "example-execution"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polygon-address-chain-validator-76b0896b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)