Build agents that can
prove what they know.
Standard large language models are stochastic text predictors—they guess the next word.
Exogram is the deterministic control plane that gives them memory and accountability.
"Language models predict the next word. Exogram determines what that word is allowed to mean."
Everyone is trying to build autonomous agents on top of a fundamentally broken architecture.
Models hallucinate and forget because they have zero capacity for accountability.
Admissibility is an existential requirement.
Before & After
Without Exogram
The agent answers confidently — and incorrectly.
User: "What's my writing preference?"
Agent: "You prefer Oxford commas."
// ❌ Hallucinated - no facts stored
Agent: "You prefer Oxford commas."
// ❌ Hallucinated - no facts stored
With Exogram
The agent queries state, finds nothing, and says "unknown".
User: "What's my writing preference?"
Agent: "Unknown - no preference stored."
// ✅ Honest - queried Exogram
Agent: "Unknown - no preference stored."
// ✅ Honest - queried Exogram
Developers buy failure prevention, not features.
First API Call (5 Minutes)
If the ledger returns nothing, your agent must say "unknown."
That is a feature, not a failure.
Store a Verified Fact
POST https://api.exogram.ai/ledger/propose_state
Authorization: Bearer YOUR_API_KEY
{
"claim": "User prefers no em-dashes in writing",
"confidence": 0.95
}
// Response
{
"status": "committed",
"vector_stored": true,
"id": "fact-abc123"
}Query Verified Context
POST https://api.exogram.ai/ledger/semantic_search
Authorization: Bearer YOUR_API_KEY
{
"query": "writing preferences",
"top_k": 5
}
// Response
{
"facts": [
{
"claim": "User prefers no em-dashes in writing",
"confidence": 0.95,
"timestamp": "2026-01-26T12:00:00Z"
}
]
}Developer Tier
$99/mo
- ✓ Unlimited API calls
- ✓ Unlimited API keys
- ✓ Webhooks (event-driven)
- ✓ Team ledgers
- ✓ 99.9% SLA