Opengolfapi

@opengolfapi/mcp-server

Golf, for AI agents — the open data layer for golf. Give your assistant every US golf course (16,845), free, and let it contribute back, sign players in, and run tournaments. Build a whole golf app from a prompt.

OpenGolfAPI is a community-owned commons. One free key, and your agent can read the world's golf data and write to four open standards.

The standards (the whole story)

OpenGolfAPI is built on open, composable protocols — implement one or all:

The big idea: every shot, moment, and round contributed makes the shared commons better for everyone — a true two-way data layer. Read is free; contributing is how you earn your place in the standard.

What your agent gets

• Read (free, no key): search & compare courses · full scorecards (par / handicap / yardages) · hazards · live weather & climate · nearby places · tee advice.
• Contribute (free key): log_shot, submit_moment → write to the open standards · get_my_shots → read your own data back.
• Identity & tournaments (free key): sign_in_with_opengolf (portable ID) · create_tournament_invite + join_tournament (run an event — handicaps optional, gross or net).

A great golf app is an afternoon, not a year.

Install (MCP client config)

{  "mcpServers": {    "opengolfapi": {      "command": "npx",      "args": ["-y", "@opengolfapi/mcp-server"],      "env": {        "OPENGOLFAPI_KEY": "<free, optional — enables contributing, identity & tournaments>"      }    }  }}

Get a free OPENGOLFAPI_KEY at https://courses.opengolfapi.org/api-keys. Read tools work with no key.

Claude Desktop: the config file is claude_desktop_config.json (Settings → Developer → Edit Config). Claude Code: claude mcp add opengolfapi -- npx -y @opengolfapi/mcp-server. Going keyless? Delete the whole env block — every read tool works without it (do NOT paste the placeholder as a key).

First prompt to try: "Find golf courses near Chicago and show me the hardest one."

Which score tool when: casual one-shot scoring → score_round · leagues/tournaments (scores arrive over time, standings matter) → create_competition → record_attempt → finalize_competition · streaming devices/live apps → submit_moment. Canonical domain model: https://api.opengolfapi.org/api/v1/model

Tools

56 tools:

• search_courses — Search US golf courses by name, US state, or location (lat/lng + radius). Returns matching courses with location, type, par. Free, ODbL data.
• get_course — Full detail for one course by id: scorecard (par + handicap per hole), tees, location, contact, nearby. Free.
• get_tees — All tee sets for a course with ratings, slopes, and yardages. Free.
• get_weather — Live weather forecast for a course location (Weather.gov). Free.
• get_climate — Monthly climate normals + best months to play for a course. Free.
• get_nearby — Nearby hotels, restaurants, and other courses for a course. Free.
• log_shot — Contribute a golf shot to the open OpenShot standard (any launch monitor). Requires a key. Units: speed mph, angles deg, spin rpm, distance yds.
• submit_moment — Contribute an Open Connect event from any sensor/wearable/phone. The whole sensor spectrum rides through here — type-specific data goes in payload. Requires a key.
• get_my_shots — Read back your own contributed shots by player or session. Requires a key.
• get_my_moments — Read back your own contributed moments (breadcrumbs, swings, putts, conditions…) by player, session, or type. Requires a key.
• propose_correction — Propose a fix to a course FACT field (phone, website, address, architect, year_built, course_name, city, postal_code, course_type). Our AI reviews it (approve/reject/needs_info). Requires a key. Geometry is not correctable here.
• respond_to_review — Respond to a correction that came back as needs_info — add a source or explanation and re-open it for review. Requires a key.
• get_correction — Check the status/verdict of a correction you proposed (approved | rejected | needs_info | applied). Requires a key.
• how_to_build — The safe playbook for building on OpenGolfAPI and contributing data the right way. Call this once before contributing.
• get_passport — FREE (public, no key). Any golfer's shareable record — display name, OpenGolf Member #, courses played, rounds, trophies, referrals. Show a player's golf resume in your app.
• record_referral — Record that one user referred another (a REFERRED_BY edge) — build YOUR app's invite loop on the shared graph, namespaced to your app. Needs a key.
• get_referrals — How many golfers a user has referred (+ the list) — the viral-loop metric for your app. Needs a key.
• about — What OpenGolfAPI is and how to use this MCP server.
• request_sign_in_code — Start "Sign in with OpenGolf" for a person: emails them a 6-digit code. No API key needed. They read you the code, then call complete_sign_in.
• complete_sign_in — Finish sign-in: exchange the 6-digit code for their OpenGolf ID + access token (use as X-OpenGolf-Token to act as them). Pass ref= when another player's invite brought them — it credits the referral.
• create_dev_key — Mint a developer API key bound to an OpenGolf ID (sign in first via request_sign_in_code → complete_sign_in). Returns the key ONCE. First-party rail: no OpenGolf ID, no key.
• sign_in_with_opengolf — Derive a user's OpenGolf ID deterministically from their email (sub = ogid_ + sha256(lower(trim(email)))[:16]) — one line, no redirect. For a VERIFIED session token use request_sign_in_code → complete_sign_in.
• register_webhook — Register an https URL for your domain events (HMAC-signed deliveries, owner-scoped). Requires your key (Authorization: Bearer ogapi_…).
• create_tournament_invite — Create a shareable invite (QR/link); everyone who redeems it joins the SAME event/session. max_uses caps size (foursome=4). Requires key.
• join_tournament — Redeem an invite token — the player joins the group/event. Requires key.
• list_game_formats — Every OpenMatch scoring format. GROSS scoring is free & keyless.
• score_round — Score a round in any format — GROSS, FREE, no key. players:[{player_id,holes:{"1":4}}] or entries:[{player_id,hole,value}]; holes:[{hole,par,stroke_index?}].
• plays_like — Effective distance — THE canonical "plays like" number (wind/elevation/temp/altitude), factors itemized. FREE, no key. Pair with get_conditions for live wind.
• get_conditions — LIVE weather at a course (temp/wind/precip, forecast-model, 15-min cache). FREE. Feeds plays_like.
• link_dev_key — Confirm your OpenGolf ID on an EXISTING key. Sign in first; pass that access_token + the key.
• list_dev_keys — List the keys owned by your OpenGolf ID (prefixes only). Needs access_token from complete_sign_in.
• get_profile — A player's public OpenGolf ID card — name, avatar, links, prefs. Free.
• update_profile — Edit a player's self-asserted profile fields (derived facts can't be set). Requires key (claimed players need their grant).
• get_awards — A player's OpenAwards — derived trophies + course passport. Requires key.
• set_beacon — Broadcast a consented, EXPIRING presence/availability beacon (present|available|open). Requires key.
• find_beacons — Discover ACTIVE public beacons (find-my-group / matchmaking). Requires key.
• record_consent — Record a player's consent grant (auditable, revocable). Requires key.
• create_competition — Create a Competition (any OpenMatch format). Requires key.
• list_competitions — List Competitions (free). Filter org/course/status.
• get_competition — A Competition + live gross standings (free).
• record_attempt — Record an Attempt (score or side-game value). Idempotent. Requires key.
• finalize_competition — Finalize — run the kernel, store the gross Result. Requires key.
• broadcast_feed — OpenBroadcast P1 — ONE typed feed for a session: broadcast-worthy items (score/side_game/money/award/condition) in ascending (recorded_at, seq) order, each with template narration (headline<=60/ticker<=80). Money appears only via settled records. Replaces stitching moments+results+live_state. Requires key + session access (participant or compute).
• get_handicap — OpenIndex (beta) — a player's estimated handicap computed from real, notarized rounds (every score stamped when it happened; verifiable by anyone). Not official — provable. Reading your OWN is free with your key; player_id must be the ogid_… form.
• get_showcase — A player's public showcase — the collectibles/records on their OpenGolf ID (og.* namespaces + course.*). Free, keyless: pass their ogid_. Tombstoned (revoked/expired) records hidden. The provable trophy wall.
• verify_record — Verify a record/collectible against the OpenGolf Chain (a signed, hash-linked, Bitcoin-anchored transparency log). Returns the hash + whether it matches + the CLIENT-RECOMPUTE recipe (sha256 of the canonical record) + the anchor. Then you can go further, all keyless: pull a merkle inclusion proof (GET /chain/anchors/:id/inclusion?hash=), verify the checkpoint's RS256 signature against /.well-known/jwks.json, and resolve the Bitcoin (OpenTimestamps) anchor. Free. Trust no one — recompute the hash, check inclusion, resolve Bitcoin yourself.
• list_webhooks — List your active webhook subscriptions. Requires key.
• remove_webhook — Deactivate one of your webhook subscriptions by id (audit row kept). Requires key.
• list_orgs — Public directory of verified orgs (free).
• mint_asset — Mint an Asset (trophy/badge/stamp/coupon/membership) into the owner's trophy case + chain. Requires key.
• file_claim — File a Claim in the trust ledger (ownership/attestation/identity/record/correction). Requires key.
• list_claims — List Claims (free). Filter claimant/subject/status.
• post_beta — Drop local course knowledge ("beta") on a hole — the AI-caddie's fuel. Requires key.
• get_beta — Read local course knowledge for a course/hole (free).
• get_my_chain — Export YOUR tamper-evident OpenGolf Chain + checkpoints. Requires key (own-read free).
• verify_chain — Verify a Chain export OR walk the public transparency log (GET /chain/log?subject=), public + keyless — recompute the hash-links, verify each RS256 checkpoint signature against the JWKS, and resolve the Bitcoin anchors; reports tampering and where. The whole history (registry, per-course, master) is independently auditable — trust no one.

The bigger ecosystem — two front doors

Agents come through this MCP; sensors/devices come through OpenGolf Connect (one open connector streaming shots from any launch monitor — R10, MLM2PRO, Uneekor, SkyTrak, Foresight — into POST /v1/shots). Both write to the same open commons. → https://opengolfapi.org/connect

Learn more

• Full AI-coder guide: https://api.opengolfapi.org/llms-full.txt
• Machine spec (OpenAPI 3.1): https://api.opengolfapi.org/openapi.json
• OpenShot field catalog: https://api.opengolfapi.org/api/v1/openshot/fields
• Moments field catalog: https://api.opengolfapi.org/api/v1/moments/fields

MIT licensed. Course data ODbL. Shots CC0.

Attribution (required if you display or redistribute the data): Course data © OpenStreetMap contributors (ODbL 1.0) via OpenGolfAPI · Weather data by Open-Meteo.com (CC BY 4.0) · Descriptions from Wikipedia (CC BY-SA 4.0) · Contact + social from Foursquare / Overture (Apache 2.0). Full list: https://opengolfapi.org/attribution