ChatGPT · Trademark

LawDiver Trademark for ChatGPT — Setup Guide

Keep ChatGPT on verified USPTO marks, briefs, manuals, and TTAB decisions. Use the free LawDiver Trademark web product today, wire a Custom GPT Action to the Trademark API, or install the official ChatGPT Trademark app when OpenAI lists it.

Open LawDiver TrademarkBack to Trademark
Official Trademark app — coming on the same path as caselaw. Until the ChatGPT directory lists LawDiver Trademark, use the free web product or a Custom GPT Action. Never paste an ld_tm_ key into a chat message.

Free web + ChatGPT side by side

Research on lawdiver.com/trademark, then paste verified results into ChatGPT:

Use only the trademark authorities below from LawDiver. Do not cite any mark, brief, TMEP/TBMP section, or TTAB decision that is not in this list. If these materials do not answer the question, say so.

[paste LawDiver Trademark results here]

Official ChatGPT Trademark app (when listed)

  1. Create a free LawDiver account at lawdiver.com/signup if needed.
  2. On a computer, open the LawDiver Trademark listing in ChatGPT and click Install.
  3. Sign in to LawDiver and click Allow. No API key paste.
  4. Start a new chat, enable LawDiver Trademark under Apps or Tools, and test:
    Using LawDiver Trademark, look up registration 4,000,000 and summarize status, owner, and goods and services from what LawDiver returns.

Until that listing URL is published, prefer the web product or a Custom GPT Action. Do not hand-roll a ChatGPT custom connector with a pasted Trademark key.

Custom GPT Action (Trademark REST)

  1. Mint an ld_tm_ key under Account → API Keys → Trademark API.
  2. Custom GPT → Actions → API Key auth, header Authorization, value Bearer ld_tm_YOUR_KEY, Content-Type application/json, against https://lawdiver.com/api/v1/trademark/*.
  3. Import OpenAPI from Trademark API docs or LawDiver-trademark-api.
  4. Paste the GPT instructions below. Endpoints: search, retrieve, case, matter, topics.

GPT instructions (paste)

You use LawDiver Trademark for every U.S. trademark authority question.
Tools map to REST: search (marks/briefs/TMEP/TBMP), retrieve (one item), case (TTAB + trademark caselaw), matter (full application file + procedural history), topics.
Never invent a serial, registration, TMEP/TBMP section, or case cite. If a tool returns empty or not_found, say it was not found in LawDiver.
A mark lookup is not a clearance opinion — state registers and common-law use are not searched.
Prefer matter when the user asks for the whole prosecution / appeal history of a serial.
Prefer case for Board or federal trademark opinions; prefer search/retrieve for manuals and briefs.
Never paste a LawDiver API key into a ChatGPT message. If you already did, delete that chat and rotate the key.

What LawDiver Trademark can do

Same surface whether you use the web, REST, MCP, or (when live) the ChatGPT app:

Search (non-case)

Marks, examination/TTAB briefs (1990+), TMEP, and TBMP — optional sources and brief scopes like the web product.

Retrieve one authority

Open one mark, brief, TMEP section, or TBMP section. Mark/brief can include procedural history and outcome.

Caselaw + TTAB

Search or retrieve Board and federal trademark opinions with good-law and citing cases when held.

Full matter file

Serial or registration → mark, briefs index, outcome trail, and whole procedural history (LawDiver + TSDR links).

Read-only

No filings, no edits, no email. Not a clearance opinion; no state or common-law search.

No invented cites

Empty results mean not found in LawDiver — not a substitute cite from memory.

Messages you can copy

After the official app is on

Using LawDiver Trademark, retrieve TMEP § 1207.01 and quote from the text LawDiver returns.
Using LawDiver Trademark, open the matter file for serial 87123456 including procedural history and summarize the outcome.

Side-by-side with pasted authorities

Use only the trademark materials below from LawDiver. Do not add any cite that is not listed.

[paste results]

MCP endpoint for developers

Streamable HTTP: https://lawdiver.com/mcp/trademark with Authorization: Bearer ld_tm_…. Catalog: toolspec.json. Claude guide: How To Connect Claude to LawDiver Trademark.

If something goes wrong

I installed caselaw LawDiver and expected trademark tools
Caselaw and Trademark are separate. Use /trademark on the web, a Trademark Custom GPT Action, or wait for the Trademark app listing.
My Custom GPT Action returns 401
Use an ld_tm_ key as Bearer …. Caselaw and Tax keys fail on /api/v1/trademark/*.
ChatGPT invented a serial or TMEP section
Paste LawDiver results and require: use only the materials below. Or look the cite up on lawdiver.com/trademark.
I pasted my API key into the chat
Delete that chat and rotate the key under Account → API Keys.

Questions

Is there an official ChatGPT app for LawDiver Trademark yet?
Caselaw LawDiver is live in ChatGPT. An official ChatGPT Trademark listing is still coming. Until then, use the free web product or a Custom GPT Action against Trademark REST. Claude already has a one-click install: https://claude.ai/directory/lawdiver-for-trademark.
Do I paste an ld_tm_ key into a ChatGPT message?
Never. Put keys only in Custom GPT Action auth settings, or wait for official OAuth. A key typed into chat cannot connect to LawDiver.
Can I use the caselaw LawDiver ChatGPT app for USPTO marks?
No. That app talks to https://lawdiver.com/mcp. Trademark tools live on https://lawdiver.com/mcp/trademark.
Is a mark lookup a clearance opinion?
No. LawDiver Trademark covers the federal register and related authorities it holds. It does not search state registers or common-law use.
Is LawDiver Trademark free?
The web product at lawdiver.com/trademark is free for now. API keys need a regular LawDiver account. ChatGPT is billed by OpenAI.

Need help?

Email support with what you tried, your ChatGPT plan, and a screenshot of any error.

[email protected]

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LawDiver Trademark for ChatGPT — Setup Guide | LawDiver