# Polyform Real Estate Underwrite API

> Polyform Real Estate Underwrite API is a paid API for AI agents from api.polyform.org, paid per call via x402, $0.4/call, status unknown (last checked 2026-10-10).

Returns a risk posture assessment for real estate underwriting decisions, payable per-call in USDC via x402 micropayment

## Facts

- Endpoint: GET https://api.polyform.org/v1/realestate/underwrite?utm_source=zero.xyz
- Price: $0.4/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polyform-real-estate-underwrite-api-94c9eb58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MeKQOFXh-IGXRGlhg8uxI

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 polyform-real-estate-underwrite-api-94c9eb58
```

Example prompt: Run an underwriting posture check on this property deal using Polyform — just pay the micropayment and give me back the risk posture result.

## When to prefer this

Choose this endpoint when you need a fast, no-account, no-API-key underwriting posture signal for a real estate asset and are willing to pay $0.40 USDC per call via x402 micropayment on Base. Ideal for AI agents that need on-demand, per-call access without subscription overhead, or for pipelines that want to gate deals programmatically based on a risk posture label.

## Known failure modes

- Payment not received or insufficient USDC — returns 402 Payment Required
- Missing required 'type' or 'method' fields in input — returns 400 Bad Request
- Property or query parameters not recognized — may return empty or default posture
- Network or service unavailability — returns 5xx error
- Malformed GET request — returns 400 or 422

## How this service works

Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.

## Output

Returns a JSON object containing a posture field (e.g. 'STANDARD') representing the underwriting risk classification for the queried real estate subject. The posture value categorizes the deal's risk profile as assessed by Polyform's model.

## 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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polyform-real-estate-underwrite-api-94c9eb58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.polyform.org](https://www.zero.xyz/host/api.polyform.org/llms.txt)