# Building Permit Records API (Chicago, NYC, Seattle, SF)

> Building Permit Records API (Chicago, NYC, Seattle, SF) is a paid API for AI agents from api.kadec0.xyz, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Retrieves building and construction permit records—including type, status, address, cost, and issue date—across Chicago, NYC, Seattle, and San Francisco.

## Facts

- Endpoint: GET https://api.kadec0.xyz/v1/permits
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/building-permit-records-api-chicago-nyc-seattle-sf-34a51cf7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VaUBxbuDZsXW-2VkgPxJn

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 building-permit-records-api-chicago-nyc-seattle-sf-34a51cf7
```

Example prompt: Can you pull building permit records in Chicago for the address 123 N Michigan Ave — show me any permits from the last year, up to 25 results?

## When to prefer this

Use this endpoint when you need structured building permit records for Chicago, NYC, Seattle, or San Francisco—particularly for real estate research, construction activity monitoring, or property due diligence. It supports filtering by address, permit type, and date range, making it ideal for targeted lookups rather than bulk municipal data ingestion.

## Known failure modes

- Missing required 'city' parameter returns a validation error
- City value outside the supported enum (chicago, nyc, seattle, sf) returns an error
- Invalid date_range format (not YYYY-MM-DD,YYYY-MM-DD) causes a parsing error
- No matching permits found returns an empty result set
- Payment failure (x402) blocks the request if USDC balance is insufficient

## How this service works

Building permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco — type, status, address, cost, and issue date.

## Output

A list of building/construction permit records for the queried city, filtered by address, permit type, and/or date range, with fields including permit type, status, address, cost, and issue date.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "city"
     ],
     "properties": {
      "city": {
       "enum": [
        "chicago",
        "nyc",
        "seattle",
        "sf"
       ],
       "type": "string"
      },
      "address": {
       "type": "string",
       "description": "full-text match on address"
      },
      "maxItems": {
       "type": "string",
       "default": "25"
      },
      "date_range": {
       "type": "string",
       "description": "YYYY-MM-DD,YYYY-MM-DD (from,to)"
      },
      "permit_type": {
       "type": "string",
       "description": "full-text match on permit type/description"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/building-permit-records-api-chicago-nyc-seattle-sf-34a51cf7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.kadec0.xyz](https://www.zero.xyz/host/api.kadec0.xyz/llms.txt)