Fathom Analytics MCP server

Query Fathom Analytics sites, stats, current visitors and events, and manage sites and events. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect Fathom Analytics50 free tool calls a month

What can I ask?

Turn on the Fathom Analytics connector, then ask in plain words. The AI picks the tools.

How many pageviews did my site get last week?
How many people are on my website right now?
How many times was the signup event triggered this month?
Add a milestone to my site for today: launched the new pricing page.

What you can do with Fathom Analytics in Claude and ChatGPT

For website owners who track their sites with Fathom Analytics.

Report pageviews for a date range

The AI runs a report on visits, uniques and pageviews over a date range, optionally grouped by date or field and filtered.

Count how often an event happened

The AI lists the events a site has tracked and reports how many times one event was completed in a date range.

Check live visitor counts, pages and referrers

The AI reads the live visitor total for a site. It can add the top pages and top referrers of those visitors.

Add, change or delete a milestone

The AI lists a site's milestones (dated notes on reports, such as a launch), and adds, renames, re-dates or deletes one.

Changes data

Add a site or change its settings

The AI creates a site in the account, or changes a site's name, sharing, timezone or multi-domain setting.

Changes data

Set or clear the currency of an event

The AI sets the currency of an event's value by event name, or clears it so the event uses the site's default again.

Changes data

How do I connect Fathom Analytics?

Before you connect

The login page asks for your Fathom Analytics API token.

Create a token at app.usefathom.com/api → Create new. A read only (all sites) token is enough for reports; writes need Admin or site-manage access. Every API request counts towards your monthly pageviews. Your token is used only to call the Fathom API on your behalf; it is never shown to anyone.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name Fathom Analytics and this URL, then click Add:
https://fathom-analytics.usefulapi.io/mcp
Claude opens the login page: enter your Fathom Analytics API token.
In a chat, click + → Connectors and turn on Fathom Analytics.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name Fathom Analytics and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://fathom-analytics.usefulapi.io/mcp
ChatGPT opens the login page: enter your Fathom Analytics API token.
In Plugins, install Fathom Analytics, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http fathom-analytics https://fathom-analytics.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "fathom-analytics": {
      "url": "https://fathom-analytics.usefulapi.io/mcp"
    }
  }
}

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "fathom-analytics": {
      "type": "http",
      "url": "https://fathom-analytics.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add fathom-analytics --url https://fathom-analytics.usefulapi.io/mcp

codex mcp login fathom-analytics

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://fathom-analytics.usefulapi.io/mcp

Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Fathom Analytics API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Proper user	$9/mo · $90/yr	10,000 tool calls / month
Pro+per user	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this Fathom Analytics server only. Ask your AI to run fathom_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with fathom_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with fathom_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 20

Show all 20 tools (the AI picks them for you)

Read only · 9

Get the API token's permissionsfathom_get_token
The connected API token's name, permissions (abilities: "*" = Admin, "all-sites-readonly", or per-site read:<id> / manage:<id>) and timestamps. The secret value is never returned. Good first call to know which tools will work.
Get the accountfathom_get_account
The Fathom account that owns the API token: id, name and email. Needs an Admin token (the * scope).
List sitesfathom_list_sites
List the sites the token can read (id, name, sharing, timezone, created_at), oldest first. The site id is what every report tool takes. Needs an Admin or all-sites read-only token; a token scoped to a single site cannot list sites, so use fathom_get_site with that site id instead. Paged: pass next.starting_after.
Get a sitefathom_get_site
One site: id, name, sharing (none/private/public), timezone and created_at.
List a site's eventsfathom_list_events
List a site's events (conversions/goals): every event name the site has tracked plus events with a currency set, sorted by name. Identify events by name (use it as event_name in fathom_get_aggregation); the id is only a paging cursor. Paged: pass next.starting_after.
List a site's milestonesfathom_list_milestones
List a site's milestones (dated annotations on reports, such as a redesign launch or a campaign start), oldest first. Paged: pass next.starting_after.
Get a milestonefathom_get_milestone
One milestone: id, name, milestone_date, created_at, updated_at.
Run a traffic or event reportfathom_get_aggregation
Fathom's custom report (the dashboard's numbers): aggregate pageviews or one event over a date range, optionally grouped by date and/or fields and filtered. Pageviews: aggregates visits (unique site visits), uniques (unique page visits), pageviews, avg_duration (seconds), bounce_rate. Events (entity event + event_name): conversions, unique_conversions, value (in cents). Examples: top pages = field_grouping [pathname], sort_by pageviews:desc; traffic sources = [referrer_source] or [referrer_hostname]; AI referrals = [ai_source]; daily trend = date_grouping day. All numbers come back as strings. Dates are in the site's timezone; hour grouping only for ranges up to 7 days. Grouped reports return at most 500 rows unless limit is set (max 1000, no paging), so narrow with filters or dates. Data before March 2021 cannot be grouped/filtered.
Get current visitorsfathom_get_current_visitors
Live visitors on a site right now: the total, and with detailed true the top 150 pages (hostname, pathname, total) and top 150 referrers.

Changes data · 7

Create a sitefathom_create_site
Create a new site in the Fathom account (returns its id, used in the tracking code). Needs an Admin token. Sharing private needs share_password; multi_domain true needs multi_domain_option.
Update a sitefathom_update_site
Change a site's name, sharing, timezone or multi-domain setting (send only what changes). Changing the timezone changes how reports are bucketed. Needs a manage token for the site.
Set an event's currencyfathom_set_event_currency
Set the currency of an event's value by event name (works before the event is first tracked). Needs a manage token for the site.
Clear an event's currencyfathom_clear_event_currency
Remove the currency set for an event, so it uses the site's default again. The event and its completion data stay. Needs a manage token for the site.
Create a milestonefathom_create_milestone
Add a milestone (a dated annotation shown on the site's reports, e.g. a launch or campaign start). Needs a manage token for the site.
Update a milestonefathom_update_milestone
Rename or re-date a milestone (both name and milestone_date are required). Needs a manage token for the site.
Delete a milestonefathom_delete_milestone
Permanently delete a milestone (only the annotation; traffic data is not touched). Cannot be undone. Needs a manage token for the site.

Your usefulapi plan · 4

Usage status (free-tier meter)fathom_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featurefathom_request_feature
Tell usefulapi that the user needs something the Fathom Analytics tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+fathom_upgrade
Get a paid plan for Fathom Analytics (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptionfathom_cancel_subscription
Cancel the caller's Fathom Analytics Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run fathom_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with Fathom Analytics in Claude or ChatGPT?

Report pageviews for a date range. Count how often an event happened. Check live visitor counts, pages and referrers. Add, change or delete a milestone. Add a site or change its settings. Set or clear the currency of an event. See what you can do for the details.

Is this an official Fathom Analytics product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by Fathom Analytics. The server calls the Fathom Analytics API with your own Fathom Analytics access, so it sees only the data that your account can see.

Can I connect Fathom Analytics to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your Fathom Analytics API token. See Before you connect for where to find it.

Do I put my Fathom Analytics key or an Authorization header in the client config?

No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Fathom Analytics API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my Fathom Analytics credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Fathom Analytics API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Fathom Analytics.

Can the AI change my Fathom Analytics data?

Yes, if you approve it. 7 of the 16 Fathom Analytics tools can create or change data. The other 9 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Fathom Analytics server only. Cancel any time: your paid plan then runs to the end of the paid period. Run fathom_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run fathom_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run fathom_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a Fathom Analytics tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with fathom_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

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