Pricing

§ Tier comparison

§ Billing

• All prices in USD. Card processing handled by Stripe; XCH1TB, LLC (dba Eyewall Markets) is the merchant of record. Sales tax / VAT, where applicable, is calculated by Stripe Tax and remitted by XCH1TB.
• Subscriptions auto-renew monthly on the calendar day of the original signup. Failed renewals retry per Stripe's standard smart-retry schedule before the subscription lapses.
• Cancel any time from your account page — it opens a Stripe-hosted customer portal where cancellation takes effect at the end of the current billing period and the most recent invoices are downloadable as PDF.
• Refunds: see refund policy.
• Payment methods accepted are whatever Stripe supports for your jurisdiction (Visa, Mastercard, Amex, Discover, Apple Pay, Google Pay, Link, and ACH where eligible).

§ What's included

Alert rules. Each rule describes a price-divergence condition — a category of event, a minimum size of the published price difference between two venues, a minimum 24h volume on each side, a minimum duration the difference has to persist. Rules drive cross-venue spread alerts; pinning an event also auto- enables price-move and high-confidence news-match alerts on it. Each tier caps how many rules a subscriber may keep enabled.

Watchlists. Subscribers pin canonical events to receive personalised signals on them: Eyewall Markets alerts when the implied probability moves materially within a configured window (default 5 percentage points / 60 minutes), and when news matched to the event with high confidence indicates the linked markets are reacting. The /account dashboard shows current cross-venue prices and 24h movement for every pinned event.

Daily digest. Eyewall Markets bundles every signal it finds for a subscriber in a cadence window — cross-venue spreads, price moves on watchlisted events, news matched to watchlisted events, and post-resolution news mispricings — into a single organised email. The tier ceiling sets how many such emails a subscriber receives per UTC day; suppressed items are visible in the account log so subscribers can see what was filtered.

Persistence floor. The shortest duration a rule may require before firing. The Starter floor of 5 minutes filters transient observations; Edge subscribers may opt into single- observation matching.

Historical price data. Each tier sets how far back a subscriber may query the recorded cross-venue price observations. Edge subscribers see the full retained history.

Venue calibration. The free /calibration page ranks every covered venue by how well its prices have matched actual outcomes (Brier score per category and horizon, recomputed weekly from resolved binary events). Subscribers and visitors alike see the leaderboard.

REST API access on the Edge tier is the read-only data surface at /api/v1/*: events, recorded cross-venue price observations, the venue reference table, market detail, and a subscriber's notification inbox. Rate-limited at 10 requests per second per api key.

MCP server on the Edge tier exposes the same dataset as seven Model Context Protocol tools, drop-in for Claude Desktop, Claude Code, Cursor, Zed, and any other MCP-aware host. A subscriber pastes one config block into their LLM client; the client can then read the event ontology, current cross-venue prices, and the subscriber's own notification inbox as native tool calls. Source at github.com/xch1tbllc/storm-mcp; installable via npx -y @eyewallmarkets/storm-mcp. MIT-licensed; uses the same Edge-tier api key.

§ What no tier includes

• Eyewall Markets does not place orders on a subscriber's behalf. There is no funded account on this site. Every venue listed is reached by the subscriber directly with their own credentials at that venue.
• Eyewall Markets is not a broker, not an exchange, not an investment advisor, not a financial, legal, or tax advisor. Notifications describe published prices; they are not buy or sell recommendations.
• Published prices are snapshots from each venue's own public read endpoints and may be stale at the moment a subscriber visits a venue. Eyewall Markets does not warrant fillable depth at any price reported.
• Venue eligibility (including Polymarket's CFTC-constrained US availability and Betfair's US geo-block) is the subscriber's responsibility, governed entirely by the venue and the subscriber's local law.

§ See also

• Methodology — how cross-venue prices are normalised and the limits of any comparison.
• About — what Eyewall Markets is and is not.
• Terms — the operating posture.
• Privacy — what data is collected and why.
• Refunds — refund policy.