# LegalPulse Trademark Knock-Out Check

> LegalPulse Trademark Knock-Out Check is a paid API for AI agents from legalpulse.theaslangroupllc.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Performs a live USPTO TSDR trademark knock-out search for a candidate name, returning official conflict risk verdicts with verbatim active/dead mark records, owner details, classes, and filing dates.

## Facts

- Endpoint: GET https://legalpulse.theaslangroupllc.com/api/legal/trademark-check
- Price: $0.5/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-knock-out-check-0c39192a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uvVvOUE9IdvdmosBrqQeb

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-knock-out-check-0c39192a
```

Example prompt: Before I commit to the name 'Waveline' for my new fintech app, can you run a trademark knock-out check against the US federal register and tell me if there are any live conflicting marks, who owns them, and what classes they cover?

## When to prefer this

Use this endpoint when you need live, officially-sourced USPTO trademark conflict data for a specific candidate name before committing to it — not for general IP education, full trademark application filing, or non-US trademark research. Prefer this over static databases or general legal guidance endpoints when real-time TSDR verification and verbatim official records matter.

## Known failure modes

- Name query returns no results — may indicate no conflicts or an overly narrow search term
- USPTO TSDR system temporarily unavailable — API may return an error or degraded results
- Very common or generic terms may return an overwhelming number of candidate conflicts
- Non-US trademarks are out of scope — endpoint covers US federal register only; non-US markets are flagged but not searched
- Payment failure (x402) blocks the call before any search is performed

## How this service works

Trademark knock-out check with live official verification: name in, conflict risk verdict out. Candidate conflicting marks are looked up in the USPTO TSDR system in real time and returned as verbatim official records (LIVE/DEAD status, owner, classes, dates) — research leads that could not be officially verified are labeled as such. US federal register; names the right register for non-US markets. Call before you commit to a name.

## Output

Returns a conflict risk verdict for the queried name, plus a list of candidate conflicting marks pulled in real time from USPTO TSDR — each record includes LIVE/DEAD status, registrant owner name, international goods/services classes, key dates (filing, registration), and a flag indicating whether the match could be officially verified. Unverifiable research leads are labeled as such.

## 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"
      },
      "goods": {
       "type": "string",
       "description": "what it will be sold as — sharpens likelihood-of-confusion class analysis"
      },
      "serial": {
       "type": "string",
       "description": "optional CSV of known USPTO serial/registration numbers to verify directly"
      }
     }
    }
   },
   "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": {
  "risk": "potential_conflict",
  "headline": "A LIVE registration for a near-identical mark exists in class 9 — proceed only with attorney review.",
  "conflicts": [
   {
    "mark": "NIMBUS",
    "severity": "significant",
    "serial_number": "97123456",
    "why_it_conflicts": "Near-identical wordmark; overlapping software goods (class 9/42)"
   }
  ],
  "next_steps": [
   "Run the official search at tmsearch.uspto.gov",
   "Consult a trademark attorney"
  ],
  "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-knock-out-check-0c39192a/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)