# LegalPulse Trademark Precheck

> LegalPulse Trademark Precheck is a paid API for AI agents from legalpulse.theaslangroupllc.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Looks up a USPTO trademark serial or registration number and returns its official LIVE/DEAD status, owner, goods/services classes, and key dates from TSDR.

## Facts

- Endpoint: GET https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/legalpulse-trademark-precheck-c6bddae4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eVPLKz8t27b3sXxdJZq-V

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 legalpulse-trademark-precheck-c6bddae4
```

Example prompt: Can you check if trademark serial number 97123456 is still active on USPTO — I need the current LIVE/DEAD status, who owns it, and what classes it covers?

## When to prefer this

Use this endpoint when you already have a specific USPTO trademark serial or registration number and need fast, authoritative LIVE/DEAD status and owner data at low cost ($0.25/call). Prefer this over the full trademark-check product when you do not need conflict-risk scoring or candidate-name discovery — e.g. for due diligence verification, licensing confirmation, or portfolio monitoring of known marks.

## Known failure modes

- Invalid or non-existent serial/registration number returns an error or empty result
- USPTO TSDR service unavailability causes lookup failure
- Malformed input (e.g. non-numeric characters in serial number) triggers a validation error
- Rate limiting or payment failure at $0.25 per call may block repeated queries

## How this service works

Trademark precheck (agent-tier preview of /api/legal/trademark-check $0.50): live USPTO TSDR verification of serial/registration numbers you already have — returns the official LIVE/DEAD status, owner, classes, and dates verbatim. Does not run candidate-discovery research or produce a conflict-risk verdict; those require the full product. For legal, brand-naming, and IP agents with small per-call budgets.

## Output

Returns verbatim USPTO TSDR data for the queried trademark: LIVE or DEAD status, current owner name, international goods/services classes, filing date, registration date, and relevant expiration or cancellation dates. Does not include conflict-risk analysis, candidate discovery, or clearance verdicts.

## 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",
     "properties": {
      "mark": {
       "type": "string",
       "description": "the brand/product name to check (used for input validation and context only — this route does not search for conflicts)"
      },
      "serial": {
       "type": "string",
       "description": "CSV of known USPTO serial/registration numbers to verify live — REQUIRED to get official records back"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "errors": {
     "type": "object",
     "description": "Documented error responses, keyed by HTTP status code",
     "additionalProperties": {
      "type": "object",
      "required": [
       "description"
      ],
      "properties": {
       "example": {
        "type": "object"
       },
       "description": {
        "type": "string"
       }
      }
     }
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mark": "Nimbus Labs",
  "upsell": {
   "adds": "Live web research to discover candidate conflicts you don't already have serial numbers for, plus an AI-generated conflict-risk verdict.",
   "price_usd": 0.5,
   "full_product": "/api/legal/trademark-check"
  },
  "live_registrations_found": 1,
  "official_verified_records": [
   {
    "mark": "NIMBUS",
    "owners": [
     "Nimbus Inc."
    ],
    "classes": [
     "009"
    ],
    "tm5_status": "LIVE/REGISTRATION/Issued and Active",
    "serial_number": 97123456
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/legalpulse-trademark-precheck-c6bddae4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from legalpulse.theaslangroupllc.com](https://www.zero.xyz/host/legalpulse.theaslangroupllc.com/llms.txt)