Proofsource

co.proofsourcePublished by proofsource.coOfficial publisherv1.0.0Updated Oct 24, 2026

AI visibility: which buyer questions name your brand in ChatGPT, Perplexity, Claude, AI Overviews.

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingData & AnalyticsBusiness & Commerce

Overview

AI-generated overview

Lets an assistant check how often ChatGPT, Perplexity, Claude and Google AI mention a brand in answers to buyer questions, and track competitors and cited sites

What you can do
Proofsource reports AI visibility for brands in a workspace. Read tools list brands and topics, then return mention rate, share of voice, average position, citation share and sentiment per engine, plus named competitors, cited websites, recent changes and open fix opportunities. Write tools add a brand, add a buyer question, and mark a fix as shipped so its effect on mention rate can be measured. A report link tool returns a shareable report, and an example tool works without signing in.
When to use it
Use it when you want an assistant to audit how AI assistants describe a brand, see which competitors they recommend instead, or build a prioritized plan from visibility gaps and track whether shipped fixes moved the numbers.
Requirements
A remote Streamable HTTP endpoint reached through OAuth 2.1 sign-in with a Proofsource account (email plus a one-time code). No API keys or environment variables are declared. A paid plan and role govern write access and question limits; new work-email accounts get two free scans.
Before you install
Write tools change your workspace: add_brand starts a scan, create_prompt adds a question that counts toward the plan's question limit, and mark_fix_shipped records a fix. The report link is an unlisted shareable URL, so treat it as semi-public. Brand websites you submit are read by the service.

Installation

In SourceWeft

  1. Open Proofsource in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/co.proofsource%2Fproofsource/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

README

Proofsource for Claude

Proofsource measures how AI assistants talk about your brand. It asks ChatGPT, Perplexity, Claude and Google AI Overviews the questions your buyers ask, and shows how often you are mentioned, which competitors are recommended instead, and which sources the answers cite.

This plugin connects Claude to your Proofsource workspace and adds two skills:

  • ai-visibility-audit: a sourced summary of your AI visibility, competitors, cited sources and recent changes.
  • fix-plan: a prioritized plan from your open gaps, plus tracking new buyer questions and shipped fixes (always asks first).

Install

/plugin marketplace add lcbasu/proofsource-plugins/plugin install proofsource@proofsource-plugins

Then run /mcp, pick proofsource and sign in with your Proofsource account. Try: "Is my brand mentioned in ChatGPT answers?"

Connect without the plugin

The connector URL is https://mcp.proofsource.co/mcp (OAuth 2.1; you sign in with your Proofsource email and a one-time code).

  • Claude (web or Desktop): Settings → Connectors → Add custom connector → paste the URL → Connect.

  • ChatGPT: Settings → Apps & Connectors → Advanced → turn on Developer mode → Create → paste the URL, choose OAuth.

  • Claude Code: claude mcp add --scope user --transport http proofsource https://mcp.proofsource.co/mcp, then /mcp to sign in.

  • Cursor, VS Code, Cline, Windsurf and other MCP clients: add a remote (Streamable HTTP) server with the URL above; see llms-install.md.

Also listed in the official MCP Registry as co.proofsource/proofsource (server.json).

Full guide: https://proofsource.co/docs/chatgpt-and-claude

Tools

Read: list_brands, list_topics, get_visibility, get_competitors, get_citations, get_changes, list_fix_opportunities, get_fix_verification, get_scan_status, get_report_link, see_example (works without signing in). Write (your workspace only, by your plan and role): add_brand, create_prompt, mark_fix_shipped.

New accounts with a work email get two free scans. Personal email addresses get an account without scans.

Support: https://proofsource.co/contact · Privacy: https://proofsource.co/privacy · Terms: https://proofsource.co/terms

Source: README.md at commit a027e15

Tools

14

list_brands

List my tracked brands

The brands this workspace tracks in AI answers, with ids and websites. Call first; every other tool takes a brand_id.

Takes no parameters.

list_topics

Which buyer questions are tracked?

The topics and buyer questions this workspace asks ChatGPT, Perplexity, Claude and Google AI for a brand. Gives the topic_id create_prompt needs.

Parametersbrand_id

get_visibility

Is my brand mentioned in AI answers?

How often ChatGPT, Perplexity, Claude and Google AI mention the brand when buyers ask about its category. by=engine (default): mention rate, share of voice, average position, citation share and sentiment per engine, with the change from the previous period. by=question: each buyer question's mention rate and rank.

Parametersbyenginesbrand_idwindow_days

get_competitors

Who does AI recommend instead of me?

The competitors AI answers name for the brand's buyer questions, per engine, with each one's share of voice against the brand and how it changed over the window.

Parametersenginesbrand_idwindow_days

get_citations

Which sources do AI answers cite?

The websites AI answers cite for the brand's buyer questions, ranked by share of citations and by how many answers cite them, and where the brand's own site ranks.

Parameterslimitenginesbrand_idwindow_days

get_changes

What changed in my AI visibility?

What moved over the window: the daily mention-rate trend, how much the engines' answers changed, notable changes on competitors' websites, and new pages about the category.

Parametersbrand_idwindow_days

list_fix_opportunities

What should I fix to show up in AI answers?

The gaps that keep AI engines from citing or recommending the brand, each with its evidence and the suggested fix. Gives the gap_id mark_fix_shipped needs.

Parametersbrand_idinclude_closed

get_fix_verification

Did my fix work?

Each fix marked shipped for the brand with its mention rate before and after and a verdict: moved (beyond normal answer churn), within_noise, or awaiting_samples. Fixes marked "Not a fix" are left out; auto-detected page changes carry source auto_detected.

Parameterslimitbrand_idfix_event_id

create_prompt

Track a new buyer question

Adds a buyer question to a topic so it is asked on every engine in the plan from the next run. Counts toward the plan's question limit. Calling again with the same text returns the existing question, never a duplicate.

Parameterstextrequiredtopic_idrequiredtarget_enginesconfirm_new_engines

mark_fix_shipped

I shipped a fix

Records that a fix shipped, against a gap_id from list_fix_opportunities or a published content_draft_id, so get_fix_verification can measure whether it moved the brand's mention rate. Calling again with the same fix and description returns the existing record.

Parametersgap_idbrand_idshipped_atdescriptionrequiredcontent_draft_idacknowledge_unfilled_gaps

add_brand

Check my brand in AI answers

Start measuring a brand: does ChatGPT, Perplexity, Claude or Google AI mention it, and who does AI recommend instead? Give the brand's website (or its app store, Google Maps, YouTube or Instagram link). It reads the site, picks the buyer questions, and starts the first scan across the AI engines. Reading the site takes 1-2 minutes; if it is still running, call again with the same link and it picks up the same run, never a second one. Returns the brand_id; then use get_scan_status.

Parameterslinkrequireddescription

get_scan_status

Is my brand's scan done?

Progress of a brand's first scan after add_brand: the stage, how many AI answers are in out of how many expected, per engine, and when it should finish. Once complete, use get_visibility for the results.

Parametersbrand_id

see_example

See an example AI visibility card

Shows what Proofsource measures, without signing in: a real visibility card for one example brand (Tesla), from answers collected from ChatGPT, Perplexity, Claude and Google AI Overviews. It shows how often AI answers mention the brand, per engine, which competitors they name instead, and sample answers. Use it when someone asks whether their brand shows up in AI answers and has not signed in. It always shows the example brand; to check their own brand they sign in.

Parametersbrand

Version history

1
  1. v1.0.0LatestOct 13, 2026

Score

90% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.