Proofsource is now in ChatGPT and Claude.

Ask your AI assistant how AI answers see your brand, and get the answer with proof.

Add to ChatGPT Add to Claude

Also works in Claude Code, Cursor and the OpenAI API.

The answer comes back as a card.

Mention rate, each engine, the competitors named in the same answers, and a link to every answer behind the number.

Before you sign in, ask for the example and see Tesla's card.
After you sign in, ask about your own brands.

Tesla in AI answersRecorded 4 to 5 Oct 2026Example

48%of 232 buyer answers name Tesla

By engine

ChatGPT59%

Google AI Overviews59%

Claude41%

Perplexity34%

Competitors named in the same answers

Ford15%

Rivian11%

SunPower11%

Open in Proofsource

Ask it like you would ask a colleague.

How visible is my brand in AI answers this week?
Who does ChatGPT recommend instead of us?
Which sources do AI answers cite for your topic?
Did the fix we shipped last week work?
Add a buyer question about your product
Give me the share link to this month's report

Connect where you work.

ChatGPT and Claude sign you in with Proofsource. No key to copy.

In ChatGPT, go to Plugins, select +, then Add custom MCP server.
Name it Proofsource and paste the server URL https://app.proofsource.co/v1/mcp.
Set Authentication to OAuth, accept the warning, and select Create as a plugin.
Install it from your personal plugins, sign in to Proofsource and select Allow. If you belong to more than one workspace, pick one first.
In a chat, type @ and pick Proofsource, then ask.

https://app.proofsource.co/v1/mcp

Sign in with your work email and a 6-digit code, or with Google. Already signed in to Proofsource in this browser? You just select Allow.

In Claude, go to Customize, then Connectors, and select Add custom connector.
Paste the server URL https://app.proofsource.co/v1/mcp. Under Authentication, pick Sign in when needed, not No sign-in, then select Add.
When Claude asks, select Connect, sign in to Proofsource and select Allow. If you belong to more than one workspace, pick one first.
In a chat, turn Proofsource on under +, then Connectors, then ask.

https://app.proofsource.co/v1/mcp

On a Team or Enterprise plan, an Owner adds it once under Organization settings, then Connectors, then Add, then Custom, with Authentication set to Sign in when needed. Each member then signs in when Claude asks.

Sign in with your work email and a 6-digit code, or with Google. Already signed in to Proofsource in this browser? You just select Allow.

Add the server, then run /mcp in Claude Code and choose to sign in:

claude mcp add --transport http proofsource https://app.proofsource.co/v1/mcp

Prefer a key? Make one in Settings → API Keys and send it as a header:

claude mcp add --transport http proofsource https://app.proofsource.co/v1/mcp --header "Authorization: Bearer YOUR_PROOFSOURCE_API_KEY"

Add Proofsource to ~/.cursor/mcp.json (or .cursor/mcp.json in a project). Cursor asks you to sign in the first time it connects:

{
  "mcpServers": {
    "proofsource": {
      "url": "https://app.proofsource.co/v1/mcp"
    }
  }
}

Prefer a key? Make one in Settings → API Keys and add it as a header:

{
  "mcpServers": {
    "proofsource": {
      "url": "https://app.proofsource.co/v1/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_PROOFSOURCE_API_KEY"
      }
    }
  }
}

Pass Proofsource as a remote MCP tool in a Responses API call, with a key from Settings → API Keys:

{
  "type": "mcp",
  "server_label": "proofsource",
  "server_url": "https://app.proofsource.co/v1/mcp",
  "headers": {
    "Authorization": "Bearer YOUR_PROOFSOURCE_API_KEY"
  },
  "require_approval": "never"
}

A read-only key can read everything. Tools that change data need a key with write access.

What it can do

Reading needs read access. The three tools that change data need write access, which you grant when you connect.

Readssee_example: Shows the Tesla example card, with no sign-in.
Readslist_brands: Lists the brands your workspace tracks.
Readslist_topics: Lists your topics and the buyer questions under each.
Readsget_visibility: How often AI answers mention you, by engine or by question, as a card.
Readsget_competitors: Which competitors AI answers name, and how often against you.
Readsget_citations: The sources AI answers cite, and where your own pages rank.
Readsget_changes: What moved: your trend, answers that changed, new sources, competitor site changes.
Readslist_fix_opportunities: What keeps engines from naming you, and the fix for each.
Readsget_fix_verification: Each shipped fix's before and after, and whether it worked.
Readsget_scan_status: How far a running scan has got.
Readsget_report_link: The share link to your latest report.
Changes dataadd_brand: Adds a brand from its website or link and starts its scans.
Changes datacreate_prompt: Tracks a new buyer question.
Changes datamark_fix_shipped: Dates a fix you shipped so Proofsource can check whether it worked.

Sign-in and privacy

New here

Sign in with your work email and Proofsource creates your account with 2 free scans. A personal address gets an account too; scans start once you add a work email.

Already a customer

Signed in on this browser? Connecting is one click. You see the brands in the workspace you pick, with the role you already have.

What is shared

When you connect, OpenAI (ChatGPT) or Anthropic (Claude) receives what each tool returns: brand names, visibility numbers, competitors, cited sources and answer excerpts. Never your sign-in code. Disconnect any time in Settings → AI agents.

The shortlist is being written right now.

See whether AI names your brand, who it names instead, and what to fix.

200 answers. 25 Prompts/Question. Top AI engines. 2 days. Free.

Google AI Overviews

Google AI Mode

Scan my brand Get a demo