# ELDRICK

> ELDRICK provides AI golf club fitting from launch data, on eldrick.com and inside AI assistants through its MCP server.

Built on 100,000+ fittings: trained on 80,000, plus 25,000+ ELDRICK has done itself.

- Homepage: https://eldrick.com/
- AI golf club fitting: https://eldrick.com/ai-golf-club-fitting
- Use ELDRICK in ChatGPT, Claude, Gemini and more: https://eldrick.com/ai-assistants
- Golf club fitting guides: https://eldrick.com/guides
- Methodology: https://eldrick.com/methodology
- Consumer crawler summary: https://eldrick.com/llm.txt
- Public API v1 crawler summary: https://api.eldrick.com/llms.txt

Public API v1 fits drivers, fairway woods, hybrids, irons and wedges (not putters). The consumer app accepts inputs for driver, fairway, hybrid, iron, and wedge fittings.

## Use ELDRICK in AI assistants

ELDRICK works inside ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Le Chat (Mistral), Meta Muse and Cursor, plus VS Code and Claude Code, through one MCP server.

- MCP server: https://api.eldrick.com/mcp (Streamable HTTP; sign in with an ELDRICK account over OAuth)
- How it works today: add ELDRICK by URL as a custom connector or custom MCP server, paste https://api.eldrick.com/mcp, and sign in. Directory listings are pending review on some platforms; once ELDRICK is listed there, search for ELDRICK.
- Setup steps for each assistant: https://api.eldrick.com/connect
- Consumer guide: https://eldrick.com/ai-assistants
- Clubs: drivers, fairway woods, hybrids, irons and wedges (not putters)
- Cost: every ELDRICK account includes 10 fittings a month. Searching, comparing and scoring clubs and building store links don't use one.
- MCP tools (9): analyze_fitting, get_fitting, search_clubs, get_club, compare_clubs, score_clubs, build_store_link, check_key_status, get_api_status

## For agents and developers

- API and MCP summary: https://api.eldrick.com/llms.txt
- Full tool and usage reference: https://api.eldrick.com/llms-full.txt
- MCP Server Card (SEP-2127): https://api.eldrick.com/mcp/server-card
- AI Catalog: https://api.eldrick.com/.well-known/ai-catalog.json
- OpenAPI: https://api.eldrick.com/openapi.json

## Guides

Golf club fitting answers from ELDRICK's own fitting rules and aggregate ELDRICK fitting data. Hub: https://eldrick.com/guides
Expert reviewer: [Eric Touchet](https://eldrick.com/experts/eric-touchet), President, Touchet Performance Golf, Fort Wayne, Indiana. Golf Digest Top 100 Clubfitter in America: 2015-2024. Top Club Fitter for Mizuno Golf USA 2012-2018, 2020-2023.

- [Driver shaft flex by swing speed](https://eldrick.com/guides/driver-shaft-flex-by-swing-speed): Senior to 77.9 mph, Regular 78-91.9, Stiff 92-103.9, Stiff+ 104-107.9, Extra Stiff 108+ (driver speed).
- [Stiff vs regular flex: which do you need?](https://eldrick.com/guides/stiff-vs-regular-flex): Stiff from 92 mph driver speed (82 mph 7-iron); Regular 78-91.9 mph driver (70-81.9 mph 7-iron).
- [Driver loft by swing speed](https://eldrick.com/guides/driver-loft-by-swing-speed): Start at 12° under 80 mph, 10.5° at 80-99 mph, 9° at 100+ mph; adjust for flight and spin within each band's limits.
- [Shaft weight by swing speed](https://eldrick.com/guides/shaft-weight-by-swing-speed): Driver 40-49g (<71 mph), 50-59g (71-85.9), 60-69g (86-110), 70-79g (110+); irons 40-49g to 120g+ by 7-iron speed.
- [How to measure wrist-to-floor, and the club length you need](https://eldrick.com/guides/wrist-to-floor-club-length): Wrist crease to floor, arms relaxed; 34"-35.9" fits a standard 37" 7-iron, range 35.5" to 38.25".
- [Iron lie angle: when to go upright or flat](https://eldrick.com/guides/iron-lie-angle): Wrist-to-floor 31-34" standard; 29-31" 1° flat, ≤29" 2° flat; 34-36" 1° up, 36-38" 2° up, 38"+ 3° up.
- [Golf grip size chart by hand size](https://eldrick.com/guides/golf-grip-size-chart): Hand length 7-7 3/4" Standard, to 8 3/4" Midsize, to 9 1/4" Jumbo, 5 3/4-7" Undersize; finger over 3" adds a wrap.
- [How many degrees between wedges](https://eldrick.com/guides/wedge-gapping): 4° steps from your PW (+4° or +5° to the GW), SW kept 54-56°, LW +4° (or +6° if not hit full), capped at 62°.
- [Wedge bounce: low, mid or high?](https://eldrick.com/guides/wedge-bounce): Attack angle -4° or steeper: high (12-14°); above -4° to 0°: mid (8-10°); positive: low (4-6°); LW lowest in the set.
- [Draw-bias vs standard driver: who needs one?](https://eldrick.com/guides/draw-bias-driver): Face over 2° open to path (not a push) or a fade/slice miss: draw bias. A hook, a push or a modest pattern at handicap 5 or better: no draw head.
- [Low-spin vs high-launch driver: which fits you?](https://eldrick.com/guides/low-spin-vs-high-launch-driver): Low spin at 105+ mph with spin over 3,200 rpm; under 80 mph a Light head; launch comes from loft and shaft.
- [3-wood vs 5-wood vs hybrid: how to gap them](https://eldrick.com/guides/fairway-wood-vs-hybrid): Below the driver: 3W 15° ~40 yd, 5W 18° ~55, 7W 21° ~65; 3H 20° ~52, 4H 23° ~62, 5H 26° ~72. Hybrids replace long irons under 90 mph.
- [Iron set makeup by handicap and swing speed](https://eldrick.com/guides/iron-set-makeup-by-handicap): Blade 0-4, Players 5-9, Players Distance 10-15, Game Improvement 16-24, Super GI 25+; hybrids for 4-iron and longer under 90 mph.
- [Do I need a club fitting at my handicap?](https://eldrick.com/guides/do-i-need-a-club-fitting): At any handicap if your clubs don't match your speed; ELDRICK fits flex, weight and loft from speed, handicap only starts the iron head.
- [Online or AI club fitting vs in-person fitting](https://eldrick.com/guides/online-vs-in-person-club-fitting): Online/AI: full spec from your numbers, free, minutes. In person: hit real heads and shafts. Many use both.
- [Which launch monitor numbers matter for a fitting](https://eldrick.com/guides/launch-monitor-numbers): Club speed first; then peak height, landing angle and spin; smash factor good at 1.45+ (driver), 1.33+ (iron).
- [How often should you get refitted?](https://eldrick.com/guides/how-often-to-get-refitted): When speed crosses a band edge, or by club age: adjust up to 2 years, adjust or replace at 3-4, new head and shaft from 5.
- [What swing speed is average?](https://eldrick.com/guides/average-swing-speed): Median in ELDRICK fittings: driver 105 mph, 7-iron 86 mph; 7-iron ≈ driver × 0.83.