# BuiltWith Pro API Pass

> BuiltWith Pro API Pass is a paid API for AI agents from api.builtwith.com, paid per call via x402, $495/call, status unknown (last checked 2026-09-14).

Purchases a Pro-tier API access pass for BuiltWith, returning a one-time pass token with report limits for keyword and technology lookups

## Facts

- Endpoint: POST https://api.builtwith.com/x402/list-pass/pro
- Price: $495/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/builtwith-pro-api-pass-801509e2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XyPNBYYRaUUJ4OqNj2bSn

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 builtwith-pro-api-pass-801509e2 -d '<json body>'
```

Example prompt: I need to unlock BuiltWith Pro API access — pay $495 USDC and get me back the pass token and report limits so I can start querying technology and keyword data.

## When to prefer this

Use this endpoint when you need programmatic, crypto-native access to BuiltWith's Pro API tier without going through a traditional subscription flow. Ideal for AI agents or automated pipelines that need to self-provision API credentials on-demand using USDC via the x402 payment protocol. Prefer this over manual BuiltWith account signup when operating in a wallet-based or autonomous payment context.

## Known failure modes

- Insufficient USDC balance — payment settlement fails and no pass is issued
- Pass token displayed only once — if not stored at response time, it cannot be recovered
- Wallet address not provided or malformed — request rejected
- Pass already active — attempting to repurchase before expiry may result in duplicate charges
- Network/settlement delay — x402 payment protocol timeout before confirmation

## How this service works

BuiltWith API Overview

## Output

Returns a JSON object with the Pro tier name, payer wallet address, price paid, a one-time-display passToken (must be stored immediately), expiration date, and both keywordReportLimit and technologyReportLimit (each 50 for Pro tier).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [],
     "properties": {},
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "passToken",
      "tier",
      "payer",
      "price",
      "expiresAt",
      "technologyReportLimit",
      "keywordReportLimit",
      "warning"
     ],
     "properties": {
      "tier": {
       "enum": [
        "basic",
        "pro"
       ],
       "type": "string"
      },
      "payer": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Base wallet recovered from the settled x402 payment."
      },
      "price": {
       "type": "string",
       "pattern": "^\\$[0-9]+(?:\\.[0-9]+)?$"
      },
      "warning": {
       "type": "string"
      },
      "expiresAt": {
       "type": "string",
       "format": "date-time"
      },
      "passToken": {
       "type": "string",
       "description": "Secret bearer token. Store it securely; it is returned only once."
      },
      "keywordReportLimit": {
       "type": "integer",
       "minimum": 0
      },
      "technologyReportLimit": {
       "type": "integer",
       "minimum": 0
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": "pro",
  "payer": "0x0000000000000000000000000000000000000000",
  "price": "$495",
  "warning": "Store this pass token securely. It is shown only in this response.",
  "expiresAt": "2026-09-01T00:00:00.000Z",
  "passToken": "returned-once-after-settlement",
  "keywordReportLimit": 50,
  "technologyReportLimit": 50
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/builtwith-pro-api-pass-801509e2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.builtwith.com](https://www.zero.xyz/host/api.builtwith.com/llms.txt)