Track 1 · Web
For writers
Browser-based memory dashboard. Keep characters, world, and timeline straight across long fiction.
- Indie / Pro / Studio plans
- BYOK or Managed
- Works with Claude, GPT, Gemini
Pick your path
Three ways to use Seizn — pick the one that fits how you work.
Track 2 · API · MCP
For developers
REST API and MCP server. Build memory-aware writing tools, plugins, or custom agents on Seizn.
- REST API + MCP server
- BYOK from $9/mo
- Webhooks, SSE stream, agent_id scoping
Track 3 · Desktop · Q3 2026
Desktop app
Native authoring app with offline-first memory and direct local file integration. Coming Q3 2026.
- Offline-first
- Mouse-gesture commands
- Charter pricing eligible
Building games or AI agents?Seizn Engine — NPC memory infrastructure →
02 / workflow
Three steps. One ledger.
Import, review, and write with the same canon behind every keystroke.
01
Import
Bring your canon in.
Drop a manuscript, point at a Google Doc, or sync a worldbuilding file. Seizn parses characters, locations, and rules into a structured ledger.
DOCXPlain textGoogle DocsNative
02
Review
Your verdict, recorded.
Every fact lands with a verdict: accepted, queued, or in conflict. Your review becomes the source of truth, replayable on demand.
canon 142pending 8conflict 3
03
Write
Draft inside the ledger.
Compose new scenes alongside the graph. Contradictions surface the moment they appear, with the rule cited and one click to override.
Scene draftLive checkReplay
03 / inputs
Meet your work where it lives.
Four ingest modes. Same ledger, same review, same canon.
docx.previewsynthetic demo data
DOCX import
Drag in a .docx, .rtf, or .odt file. Seizn extracts characters, scenes, and dialogue into the ledger.
manuscript_v3.docx
142 facts / 8 chars / 22 rules
appendix_lore.docx
36 facts / 3 rules
character_bible.rtf
3 conflicts in canon
04 / conflicts
Every contradiction, cited and ranked.
Severity is signal, not noise. Critical breaks canon outright. Minor flags a soft drift you may want to keep.
criticalcharacter.han_iseul.eye_color
Chapter 11: Mira has gray eyes.
Canon in chapter 2 says brown.
ref scene.2.1ref character.han_iseul
majorrule.r03 rooftop access
Chapter 7: Eli enters the rooftop on day 9.
Rule r03 locks rooftop access until day 14.
ref rule.r03ref scene.7.4
minorcharacter.yun_hana.club
Chapter 18: Yun Hana attends astronomy club.
Canon says photo club. It may be a transfer event.
ref character.yun_hana
canon graph D306 nodes / 8 links
Han Iseul
Jeong Serin
Yun Hana
Park Jio
Kim Minchae
Choe Doyun
canonpendingconflict
saebyeok synthetic demoThe graph is not cosmetic. Every conflict points to the exact node and edge that broke.
05 / simulation
Replay before you commit.
Stage a scene against the ledger. Seizn projects downstream impact at the token level: safe paths and risk paths, ranked.
Safe pathcontinuity 92%
Mira stays at the observatory until dawn.
Honors r02 and r04. No new conflicts. Continuity stays intact.
scene.continuesrule.r02rule.r04
Risk pathcontinuity 41%
Mira leaves before the eclipse peak.
Drops r02 anchoring. Two downstream scenes lose their grounding event.
drops.r02scene.16.orphanscene.21.orphan
token-level diff: scene 14.observatory.draftreplay ready
14: Mira climbed the rooftop on day 9 // proposed
14: Mira climbed the rooftop on day 14 // safe rewrite
06 / trust
Author-grade by default.
Decisions you can defend, infrastructure you can audit, separation rules you can prove.
Workspace-isolated
Sample IP is synthetic. Your manuscript never trains a public model.
BYOK supported
Bring your own Anthropic key. 50% off list price, unlimited tokens.
Replayable canon
Every verdict is logged. Roll back, branch, or audit any decision.
SFW-only policy
Litheon LLC operates Seizn under a strict safe-for-work content rule.
07 / pricing
Pay for the ledger, not the LLM.
BYOK halves the price and lifts the token cap. Yearly saves 15%. 30-day trial on every tier.
1M tokens / mo
Indie
$39/ month
For solo authors holding their own canon.
- 1 IP project
- Canon ledger and replay
- Unlimited reviews
- 30-day trial, no card
5M tokens / mo
Pro
$149/ month
For pro authors and small studios shipping multiple IPs.
- 5 IP projects
- Branch and diff canon
- Priority conflict review
- Team-of-3 collaboration
- BYOK 50% off
Studio
20M tokens / mo
Multi-IP, multi-author. Audit log, role permissions, dedicated review queue.
$499 / month
Enterprise
Unlimited
Custom data residency, SSO, on-prem replay archive, premium SLA.
From $2,500 / month
Contact salesAPI · MCP
API plans for Claude, Cursor, and Cline
Track 2 connects Seizn canon recall, conflict checks, and timeline tools to the AI workspace you already use.
Checkout and legal consent stay on the pricing page's API · MCP tab.
Free
$0
50 calls/day · 30/min
Indie
$19/mo$11/mo
1,000 calls/mo · 60/min
Pro
$39/mo$23/mo
10,000 calls/mo · 60/min
Studio
$199/mo$119/mo
100,000 calls/mo · 600/min
Studio Managed
$999/mo$599/mo
100,000 calls/mo · 600/min
08 / faq
Five things authors ask first.
How is Seizn different from Sudowrite or NovelCrafter?+
Seizn is not a writing assistant. It is a canon ledger. We do not generate your prose; we hold your facts to the letter and surface contradictions as they appear.
What does BYOK actually unlock?+
Bring your own Anthropic key and pay 50% of list price with unlimited tokens.
Can I export my canon?+
Always. Every ledger exports as structured JSON, plain markdown, or DOCX. No lock-in. Cancel anytime and leave with your work.
What happens to my manuscript?+
Your work is isolated from sample IPs and from any public model training. The Saebyeok demo on this page is synthetic data, not a real customer.
Does the trial need a credit card?+
No. 30 days, no card. After day 30, pick a tier or your project archives in read-only mode for another 60 days.