Getting started with Sleeper
Open My Teams, enter your public Sleeper username, and sync. Choose NFL or NBA in the app header. Fantavex AI imports leagues and rosters through Sleeper’s public read-only API; no Sleeper password is requested.
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AI command center · football & NBA first
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Fantavex AI
Welcome back, GM
Your fantasy insights, prepared from your synced league data.
Next Best Setup Step
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MVP Launch Readiness
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Fastest Path to Usable Recommendations
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Fantavex Command
Ask Fantavex AI about NFL · Sleeper · Dynasty
Guided Intents
Required for AI Recommendations
Account authenticated
Sleeper username synced
League selected
Roster imported
Players synced
Data status
Priority Decision Queue
Sync Sleeper to unlock all decision queues
Start/Sit decisions — Awaiting roster sync
Pending
Waiver opportunities — Awaiting roster sync
Pending
Player news — Awaiting roster sync
Pending
Trade windows — Awaiting roster sync
Pending
Data & Readiness Status
Data Confidence
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No data source
Last Sync
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Awaiting sync
Lineup
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Sync roster first
Top Recommendation
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Awaiting Sleeper Sync
No verified recommendation available
Pending
Confidence
—%
Why
Connect your Sleeper league to generate evidence-backed recommendations.
Evidence
Risk
Unknown — no data
Action
Sync league first, then return to this view.
Evidence Panel
Projection
Usage
Matchup
News
Role
Roster Fit
League Settings
Source Freshness
Pending
Change Trigger
What would change this recommendation? — Sync your league first.
Data freshness — Awaiting Sleeper sync · Pending
Player Comparison
Player A
Position · Team
Projection
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Opportunity
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Risk
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VS
Player B
Position · Team
Projection
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Opportunity
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Risk
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Start/Sit · Waivers · Player comparisons available after Sleeper sync.
Linked Platforms
Sleeper
My Teams →
Y!
Soon
Yahoo
Coming Soon
ESPN
Soon
ESPN
Coming Soon
MFL
Soon
MFL
Coming Soon
RW
Future
RotoWire
Data feed
SDIO
Future
SportsDataIO
Data feed
NFL Roster
Awaiting Sleeper Sync
Source: Sleeper
Sport: NFL
Mode: Dynasty
Data: Awaiting sync
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Record
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Rank
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Pts For
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Team Value
Start/Sit
Projection-based lineup comparisons for your NFL roster.
Waivers
Compare free agents and waiver targets with projections.
Players
Search and filter the available NFL player universe.
More
Settings, data status, help, and future features.
Roster · NFL
Getting Started
Set up your Sleeper workspace
Connect by username, sync read-only league data, then explore verified Fantavex AI tools. No Sleeper password or roster permissions are required.
Sleeper · Connection Status
Loading…Powered by Sleeper’s public read-only API. Fantavex AI is not affiliated with or endorsed by Sleeper App, LLC.
Connect a Sleeper Account
Link your Sleeper username to import your leagues and rosters.
Read-only · Public API only. Fantavex AI uses only Sleeper’s documented, public, read-only API (docs.sleeper.com) to import your league and roster data. No Sleeper password is ever requested, stored, or transmitted. Fantavex AI does not perform any add, drop, trade, lineup, or draft actions on your behalf. Fantavex AI is not affiliated with or endorsed by Sleeper App, LLC.
⚠ You have more than 20 leagues. Only the first 20 were synced to stay within safe API rate limits. This covers the vast majority of users.
⚠ Fantavex AI could not save this sync. Please retry Sync. If it keeps failing, send feedback so support can review the issue.
Connected to Sleeper. Your leagues, teams, and roster players are ready.
Your Roster · Synced League
Just synced
Player Card Preview
No real player data — Structure preview only
QB
QB
Your QB Name
Projection
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Opportunity
—
Roster Fit
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Risk
—
Ceiling
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Floor
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WR
WR
Your WR Name
Projection—
Opportunity—
Roster Fit—
Risk—
Ceiling—
Floor—
RB
RB
Your RB Name
Projection—
Opportunity—
Roster Fit—
Risk—
Ceiling—
Floor—
Real player cards and league rosters populate after a successful sync. Full projections, rankings, and news require additional data sources.
System Control Center
System status, diagnostics, and internal tooling for super administrators.
Staging app
Open this staging appEnvironment
Staging · Netlify
AI Readiness
Requires provider decision
Public-launch
Blocked · see Launch Readiness
Fantasy Decision Workflows
Draft Room, Start/Sit structure, Waivers, Players, Player Detail, local watchlist, onboarding, Help, and Feedback are implemented without paid providers.
Module: Lineup
Sport: NFL
Platform: Sleeper
Mode: Dynasty
Data: Awaiting sync
Lineup Optimizer
Weekly NFL Start/Sit decisions and game-by-game NBA lineup recommendations — powered by your synced Sleeper roster and verified projection data.
Start/Sit Decisions
Evidence-backed weekly lineup recommendations with confidence grades.
Injury & News
Auto-flags players with injury risk or negative news before lock.
Matchup Grades
Defensive matchup and usage context baked into every recommendation.
Required: Sleeper Sync
Connect your Sleeper account and sync your league before Lineup recommendations are available.
Module: Waivers
Sport: NFL
Platform: Sleeper
Mode: Dynasty
Waivers — AI Advice
Get AI-powered waiver wire and roster advice for dynasty and redraft leagues.
Fantavex AI Recommendation
Confidence
Reasoning
Risk Flags
⚠ Live player news is not connected yet. Always verify current injury reports and news before making roster decisions.
Module: Trades
Sport: NFL
Platform: Sleeper
Loading Trade Analyzer…
Module: Draft
Sport: NFL
Platform: Sleeper
Mode: Dynasty
Draft Guidance
Coming SoonRookie and redraft draft guidance — position-by-position tiering, ADP alerts, and AI pick recommendations backed by verified projection data.
Live ADP Tracking
Real-time dynasty ADP with value alerts when picks fall.
AI Pick Advisor
Best available player based on your roster needs each pick.
Rookie Rankings
Dynasty rookie tiers updated post-NFL & NBA draft.
Preview — Dynasty Startup Big Board
1
Ja'Marr Chase
WR
CIN
99.1
2
CeeDee Lamb
WR
DAL
97.4
3
Bijan Robinson
RB
ATL
95.8
4
Jalen Hurts
QB
PHI
94.2
5
Malik Nabers
WR
NYG
92.7
Module: Fantavex Draft Room
Sport: NFL
Platform: Sleeper
Mode: Dynasty
Draft: No active draft synced
Read-Only · No picks made by Fantavex AI
Fantavex Draft Room
Coming SoonLive Sleeper draft · Read-only pick advisor · Roster context
Live Draft Board
Awaiting Sleeper Draft Sync
1.01
WR
1.02
RB
1.03
WR
1.04
QB
1.05
WR
On the clock — Awaiting sync
On Clock
1.06
RB
Upcoming
1.07
TE
Upcoming
Current Pick
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Pick Advisor
Awaiting draft sync
Rec
— Sync draft first
Roster Fit
Unknown
ADP Gap
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Ceiling
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Trade-Back
Alert
Trade-back value alerts appear when moving back creates better value. — Awaiting draft data.
Best Available
WR Run?
RB Tier Break
QB Value
Position run and value alerts load when draft is synced.
WR
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RB
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QB
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TE
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Roster Needs
QB
RB
WR
TE
PK
DEF
Heat map awaiting synced roster. Colors shown are placeholders.
What Fantavex Draft Room Provides
Live Feed
Connects to your active Sleeper draft in real time. Read-only — no picks made by Fantavex AI.
Pick Advisor
Next-pick recommendation with confidence grade, roster fit, and evidence summary at every turn.
ADP Alerts
Flags value picks when players fall past their ADP — dynasty and redraft supported.
Module: News
Sport: NFL
Platform: Sleeper
Source: No news feed connected
Confirmed facts
Credible reports
Team-plan signals
Rumors / speculation
News
Team and player news scored for roster impact — injuries, suspensions, depth chart changes, and usage shifts mapped directly to your roster.
Impact Scoring
Each news item scored High / Medium / Low impact on roster value — no noise, only what matters.
Roster Alerts
News linked to your synced Sleeper players — you see only news that affects your team.
Action Guidance
Each alert includes a recommended roster action: hold, drop, add, or watch.
Module: League Market
Sport: NFL
Platform: Sleeper
League: Awaiting Sleeper Sync
League Market
Trade partner analysis and league economy intelligence — who is buying, who is selling, and where the best deals are in your specific league.
Trade Partner Finder
Identify league-mates most likely to accept specific packages based on their roster needs.
Buy-Low / Sell-High
Players whose value diverges most from league perception — sourced from league transaction data.
League Economy
Contender vs rebuilder mapping, draft capital distribution, and trade difficulty by team.
Account
Signed in securely
Role:
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Your account is secured so that only your data is accessible to you. Passwords are handled by our secure sign-in — Fantavex AI never sees or stores them.
We will email a confirmation link to your new address. Your email only changes after you click that link.
Fantavex AI never makes roster moves
Fantavex AI recommends roster actions only. All adds, drops, trades, and lineup changes are made by you inside Sleeper or your platform. No fantasy passwords are stored. No roster actions are performed by Fantavex AI.
Fantasy Platform Connections
Y!
Yahoo Fantasy
E
ESPN Fantasy
MFL
MFL
Sleeper Connection
Loading connection status…
Two-Factor Authentication
Optional. Not required to use Fantavex AI today. Adds a time-based one-time-passcode (TOTP) app (e.g. Google Authenticator, 1Password) as a second sign-in factor.
Loading two-factor status…
Scan this QR code with your authenticator app, then enter the 6-digit code it shows.
Can't scan? Enter this code manually:
Lost your device? Contact support from the Help page to verify your identity and remove your two-factor factor — do not share your recovery codes or authenticator app with anyone, including anyone claiming to be Fantavex AI support.
Have a Beta Invitation Code?
Core beta tools require an approved account. If you received an invitation code, enter it here to request access. You can still manage your account before approval. Need an invitation? Contact support@fantavexai.com.
Your Data
A truthful summary of what Fantavex AI stores about you, and a complete download.
Loading data summary…
The export includes everything listed above. It never includes your password or platform access tokens. Your device-local watchlist and preferences are included automatically when exported from this browser.
Security Status
Your data is private — only you can access your information
Every request is authenticated and verified
Sensitive keys stay secure on our servers, never in your browser
Industry-standard security protections are active
Email verification status loading…
OAuth tokens (Yahoo/ESPN) — encrypted storage when platforms are added
Context Preferences
Your active sport, platform, and fantasy mode. Saved in browser storage — moves to your account in a future release.
Active Sport
Fantasy Mode
Active Platform
Preferences persist in localStorage. They reset to defaults if browser storage is cleared.
Sleeper integration uses only Sleeper’s public, read-only API. Fantavex AI is not affiliated with or endorsed by Sleeper App, LLC. No Sleeper password is ever requested or stored.
App & Install
Install Fantavex AI for a faster, standalone app experience with an offline fallback shell.
Running as installed app
You're offline. Fantavex AI is showing the last saved app shell; fantasy data will not refresh until you're back online.
Legal & Compliance
Terms, privacy, AI transparency, and platform disclosures.
Sign Out
You will be returned to the login screen.
If you suspect unauthorized access to your account, sign out of all devices, then use Forgot Password on the sign-in screen to set a new password.
Super Admin Only
Full App Diagnostic Framework
14-category system check · Provider health · Sleeper data-flow trace · DOM render audit · Security compliance
Diagnostic Summary
—Provider Registry Health
Sleeper Data-Flow Pipeline Trace
API → DB write → DB read → frontend state → DOM render
All Checks
Click "Run Full Diagnostics" to begin.
Raw Report (paste into ChatGPT)
Sensitive values are redacted · No secrets exposedRun diagnostics to see the full report here.
Super Admin Only
Admin Management
Assign and remove admin and super_admin roles. Changes are logged to the audit trail.
Logged in as:
Assign Role
Enter the user's email address or Supabase UUID, then select a role.
Current Role Assignments
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Players
Search every loaded player, verify league ownership, and open accessible Player Detail.
More
Settings, data status, help, and what's coming next.
Data Status
Connection and projection freshness for the active league.
Help
Guidance and support for Fantavex AI.
Contact Fantavex AI
For support, privacy or deletion requests: support@fantavexai.com. Do not send passwords, payment details or sign-in codes.
11 help topics
Disconnecting Sleeper
Settings → Sleeper Connection → Disconnect Sleeper removes your Sleeper connection, clears the selected league/team, and removes server-stored imported leagues, rosters, and players. Your Fantavex AI account stays active and you can reconnect any time. This is different from account deletion. Your saved players list on this device and your Recommendation Strategy/Market Style preferences are not affected unless you separately choose to clear that saved list.
Understanding data labels
Checked means we matched the information to its source and your selected league. Past results describe completed games or trades. Not available means we do not have reliable information yet. Roster balance describes how your players fill positions; it does not predict points.
Start/Sit before projections
Start/Sit currently shows verified lineup slots, eligible alternatives, bench, taxi, reserve, and empty-slot warnings. It does not declare a winner, display invented points, or use confidence grades while projections are unavailable.
Waivers and free agents
Waivers shows league waiver type, clearing period, budget when Sleeper provides it, and verified ownership. Browse and filter free agents without automated adds, drops, rankings, FAAB bids, or spending advice.
Players and Player Detail
Players searches the complete loaded Sleeper directory with ownership, team, position, source, and pagination. Select a player name for accessible detail. Projection and news fields remain explicitly unavailable without verified sources.
Device-local watchlist
Use Watch in Players or Add to Watchlist in Player Detail. The list is saved only in this browser using local storage, is separated by sport, and does not sync to Sleeper or make transactions.
Live Draft Room
Draft Room follows your active Sleeper league and reads draft status, picks, traded-pick ownership, history, and the undrafted player pool. It polls only while visible and never submits a pick.
Scouting and league market
Roster structure uses slot coverage, depth, flexibility, and verified inventory. Market views use completed Sleeper trades. Potential partners describe roster fit and activity; they do not predict acceptance, fairness, or motivation.
Privacy and read-only safety
Fantavex AI authenticates access to your workspace and uses Sleeper’s public API for fantasy data. It never asks for a Sleeper password and never performs lineup changes, adds, drops, trades, waiver bids, or draft picks.
Troubleshooting sync
Confirm the exact public Sleeper username, retry Sync in My Teams, and choose the correct active sport and league. If ownership cannot be verified, Fantavex AI labels availability unverified instead of guessing.
No help topics match
Try a broader term or clear the search.
Privacy Center
View, export, or request deletion of your data.
Your rights
You can see exactly what Fantavex AI stores about you, download a complete copy, and request permanent deletion at any time. Fantavex AI never sells your data.
Access and export your data
See a live summary and download a complete JSON copy in Settings → Your Data.
Delete your account
Legal documents
Privacy Policy, Notice at Collection, and Data Deletion Policy are available in the Legal Center.
Pricing
Current beta terms and planned pricing for the future paid launch.
Available in Fantavex Fantasy Beta
Optional analysis packs (planned, not currently available for purchase)
Available now in the beta
- Sleeper NFL and NBA league connection
- League discovery, switching, and roster sync
- Scoring and roster settings
- Verified ownership and free agents
- Players browser and Player Detail
- Device-local watchlist
- Team Scouting roster structure and grade
- Historical performance and head-to-head
- League Trade Market and potential partners
- Live read-only Draft Room
- Start/Sit lineup structure
- Account, export, and privacy controls
- Installable PWA, Help, and Feedback
Planned after provider validation
- Projection-based Start/Sit recommendations
- Projection-based waiver gains and FAAB guidance
- Projected performance grades
- Projection-based league power rankings
- AI-generated explanations
- Injuries and news
- External rankings, dynasty and trade values
- Paid subscriptions and billing
- Apple App Store and Google Play availability
Beta and fair-use terms
Frequently asked questions
Can I be charged right now?
No. Purchasing is disabled for every plan right now. The beta is free to use, and nothing on this page can be bought today.
What happens to my beta access when paid plans launch?
You will be notified before any billing begins. Continuing to use the free tier will remain an option.
Will I be charged automatically for extra AI usage?
No. Fantavex AI will not add automatic overage charges. Optional packs will require your explicit action to purchase once billing is active.
Do failed or cached results use my analysis allowance?
No. A failed AI call will not consume an analysis, and viewing a previously generated result will not consume another one.
Beta Feedback
Tell us what blocked you, what felt confusing, or what would make the recommendation more useful.
Coming Next
Roadmap and future Fantavex AI features.
- Draft guidance and live Fantavex Draft Room integration.
- News and injury impact scoring for your roster.
- League Market insights for trade partners and league economy.
- Yahoo, ESPN, MFL, and additional platform integrations.
- Keeper mode support and natural-language command routing.
Supplemental NFL statistics and season roster records: nflverse, used under CC BY 4.0. Selected factual fields are normalized for league scoring and current-season candidate checks. Fantavex estimates are calculated separately.
Legal Center
Terms, privacy, AI transparency, and platform disclosures.
These documents are working drafts. Attorney review is required before public paid launch.