Know when the price qualifies—and when it no longer does.

Posterior Pro completes every live Decision: what the outcome is independently worth, the exact price limit that still clears policy, where the best eligible quote exists now, what changed, and the Receipt preserving what Posterior filed. Free keeps public MLB intelligence and settled proof open. Builder remains a separate machine-access add-on that requires active Pro.

Live decision intelligence

Pro

$29per month

Know what Posterior thinks the outcome is worth, the exact price that still qualifies, where the best eligible quote exists now, and what changed afterward.

→Posterior Price: independent probability and fair value
→Action Window: the worst price that still clears policy
→Current quote: exact eligible sportsbook, price, and freshness
→Price-only WAIT triggers kept separate from pending inputs and policy rejections
→Decision timeline and alerts when state or price materially changes
→Permanent Receipt preserving the original filing and settlement
→Every current qualified Decision; no forced slate count

Subscribe to Pro

Public receipts

Free

$0always

One public recommendation is available during supported regular-season slates when an opportunity qualifies. Public records, delayed resolved receipts, news, and descriptive baseball context remain open between boards.

→One public recommendation when a supported slate qualifies
→Explicit paused, unpublished, no-opportunity, and unavailable states
→Safe slate counts and descriptive form
→Resolved ledger CSV after release delay
→Calibration curve and season record
→Source-linked MLB news briefs

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Machine access

Builder API

$99API add-on

Structured access to Posterior’s supported probabilities, immutable decisions, market states, public evidence and player context. Builder is a $99 monthly add-on after Pro, for a $128 monthly combined list price before applicable tax.

→Public OpenAPI schema and delayed resolved CSV
→Bearer-protected supported production endpoints
→Active Posterior Pro plus Builder add-on required
→100 requests per minute per active key by default
→Subscriber and API exports: no resale, mirroring, or bulk republication without written permission

Start Builder API

Compare

Capability	Free	Pro	Builder API
Resolved public ledger	Delayed CSV	Delayed CSV	Delayed CSV + API-ready shape
Live Posterior Decisions	One public recommendation when a supported slate qualifies	Price + Action Window + current quote + timeline	Versioned picks API
Calibration and record	Public dashboards	Public + subscriber views	Public + API endpoints
Personal desk	Account shell	Team, player, and alerts	Team/player context endpoints
API sandbox	Open docs	Open docs	Open docs + production key

Is Free a trial?

No. Free is the public proof layer. A supported regular-season slate may include one public recommendation when an opportunity qualifies; resolved examples, the delayed ledger, public records, news, and descriptive context remain visible when the board is paused or has no qualifying opportunity.

Does Pro promise profit?

No. Pro shows probabilities, market context, and conservative risk references. Posterior publishes losing days and calibration drift instead of promises.

What does Builder API add?

Builder adds structured access to supported probabilities, immutable decisions, market states, public evidence, and player context. It is a $99 monthly add-on that requires active Pro, for a $128 monthly combined list price before applicable tax. A Pro web subscription does not silently grant API access.