Use GridIron Data NFL fantasy data in Claude (custom connector)

Server URL

https://api.gridirondata.com/mcp

Where

Customize → Connectors

Sign-in

OAuth (GridIron account)

Claude plans

All, Free limited to one

What do I need first?

• Any Claude plan. Anthropic's article lists Free, Pro, Max, Ultra, Team and Enterprise; Free users are limited to one custom connector.
• On Team and Enterprise, an Owner adds the connector for the organization first (see below); members then connect it.
• A GridIron Data account. No account? Sign up free (no credit card), or create one on the sign-in screen.

How do I add GridIron Data to Claude?

These steps are for Pro, Max and Free accounts, on claude.ai or Claude Desktop (connectors you add sync between them).

1. Open Connectors. Go to Customize > Connectors (claude.ai/customize/connectors).
2. Add a custom connector. Click + Add, then Add custom connector.
3. Name and URL. Name: GridIron Data. Remote MCP server URL: https://api.gridirondata.com/mcp. Click Continue, review the detected settings, and click Continue again.
4. Keep the sign-in defaults. Under Authentication, choose Sign in now (or Sign in when needed). Under OAuth client, keep Use Claude's published identity (Recommended). Click Add.
5. Sign in to GridIron Data. A GridIron Data page opens: sign in with email and password, Google or GitHub, and click Allow.
6. Turn it on in a chat. Click + at the lower left of the chat box, choose Connectors, and switch GridIron Data on.

Older layouts show the name, URL and an Advanced settings section on one screen. Leave the OAuth client ID and secret empty there; Claude registers itself.

How does a Team or Enterprise organization add it?

1. An Owner goes to Organization settings > Connectors (claude.ai/admin-settings/connectors), clicks Add, hovers Custom and selects Web.
2. Enter the name GridIron Data and the URL https://api.gridirondata.com/mcp, and finish with the same sign-in defaults as above.
3. Each member goes to Customize > Connectors, finds GridIron Data with the Custom label and clicks Connect, then signs in with their own GridIron Data account.

Each person signs in separately, so each person's calls run on their own GridIron plan.

Can I use an API key instead of signing in?

Only if your organization has Claude's Request headers option, which Anthropic describes as a beta for a limited set of organizations. If you have it: choose No sign in, then under Request headers pick authorization and enter Bearer YOUR_KEY (with the space), or pick x-api-key and enter the key alone. Your key is on your dashboard. Authentication can't be changed after you add a connector; remove it and add it again.

What can I ask Claude about fantasy football?

Ask in your own words; the assistant picks the tool. A few that work well:

• "Using GridIron Data, what are the top 10 RB projections this week in half-PPR?"
• "Who are the biggest snap-share risers at WR over the last three weeks?" (Basic)
• "Any injury news on my starters: Josh Allen, Bijan Robinson and CeeDee Lamb?" (Basic)
• "Which defenses give up the most fantasy points to tight ends?" (Pro)
• "What's the probability Drake Maye goes over 245.5 passing yards this week?" (Pro)

A free GridIron Data account answers player lookups and this week's projections. Stats, snap share, news, matchups, rest-of-season projections, the schedule and other weeks need Basic ($5/month or $45/year). Prop probabilities, defense vs position, betting lines, the injury-changes feed, depth charts and inactives need Pro ($29/month or $249/year), the betting plan. A question outside your plan comes back with the plan it needs, and the assistant tells you. See plans. Prop probabilities are a model estimate, not betting advice.

Player names, positions and ids are matched case-insensitively. Scoring is PPR unless you ask for half-PPR or standard. All 21 tools are listed on the AI assistant setup hub.

Troubleshooting

• Claude doesn't use the tools. Check the connector is switched on for this conversation (+ → Connectors), or name it in the question: "Using GridIron Data, …".
• Can't add a second custom connector. Free Claude plans allow one custom connector. Remove another one, or use a paid Claude plan.
• Team member can't find it. An Owner has to add GridIron Data under Organization settings first; then it appears with the Custom label under Customize > Connectors.
• Sign-in page says the link expired. The sign-in has 15 minutes. Start the connection again from your assistant.
• Asked to sign in again. You regenerated your API key, your plan ended, or the connection went unused for 30 days. Reconnect and sign in.
• "Not available on this account's current plan". That question needs Basic or Pro. The reply names the plan; see plans.

Frequently asked questions

Can Claude get live NFL fantasy football data?

Yes. Add GridIron Data as a custom connector (https://api.gridirondata.com/mcp) under Customize > Connectors, sign in with a GridIron Data account, and Claude can pull weekly projections, stats, snap share, news, injuries and player-prop probabilities.

Does this work in Claude Desktop and on mobile?

Yes. Custom connectors added on claude.ai are available in Claude Desktop and the mobile apps for the same account. Claude connects to GridIron Data from Anthropic's cloud, so nothing runs on your computer.

Does it work on the free Claude plan?

Yes. Free Claude plans can add one custom connector. GridIron Data's free account answers player lookups and this week's projections; stats, news and other weeks need Basic, and prop probabilities need Pro.

How is this different from Claude Code?

This page is for the Claude chat apps. Claude Code, the command-line coding tool, adds the server with one command; see the Claude Code guide.

Does Claude see my GridIron password or API key?

No. You sign in on a GridIron Data page; Claude gets a token that works only for this server, expires after an hour and renews itself.

Using a different assistant?

• ChatGPT
• Claude Code
• Gemini (Gemini CLI)
• GitHub Copilot (VS Code)
• Cursor
• OpenAI Codex
• Windsurf (Devin Desktop)
• Microsoft Copilot Studio
• Run it locally (stdio)

Every assistant connects to the same server, https://api.gridirondata.com/mcp. The AI assistant setup hub compares them.