Cortexiom API — For Developers
Reasoning as infrastructure.
The Cortexiom API attaches a multi-step reasoning architecture to any AI application. Reflect, calibrate confidence, surface contradictions, maintain persistent state. Across any foundation model.
Now in private beta. Start with 50 free encounters — no credit card.
We are accepting design partners on a rolling basis.
Get your API key01 — The Interface
What the API does
Every AI API returns an answer. The Cortexiom API returns an answer and tells you how certain it is — and why.
Before any response is committed to, the architecture runs multiple structured reasoning steps: observe the input, form competing hypotheses, detect contradictions, calibrate confidence, synthesise. What you receive is the answer plus a reasoning audit trail — confidence score, reasoning depth, and an encrypted state token that carries context forward automatically.
Build products that know when to trust their AI, and when to escalate.
Request
POST /v1/encounter
{
"message": "I can't decide whether
to launch in Q2 or Q3.",
"persona": {
"name": "Aria",
"role": "executive advisor",
"domain": "early-stage startup strategy"
}
}Returns
Reasoned response · confidence score
Depth indicator · credits used
Encrypted state token for continuity
02 — Why It Matters
Why developers want it
Consequential AI decisions need confidence scores.
When your AI approves a request, routes a task, or makes a recommendation, you need to know how certain it is. The Cortexiom API returns a confidence score with every response — so low-confidence decisions get escalated and high-confidence ones go through. You can't build that on a standard completion API.
Calibrated AI has lower total cost than confident AI.
A confident wrong answer costs more than an uncertain correct one — in retries, escalations, and lost user trust. The reasoning layer catches contradictions before any response is committed, shifting spend from correction to prevention. Token cost per call is similar. Operational cost isn't.
Your reasoning infrastructure shouldn't depend on one model.
The Cortexiom API works on top of any foundation model. Switch providers, run experiments, manage costs across tiers — without rebuilding your reasoning layer. Your product's value compounds in the architecture, not in a specific model's weights.
03 — Pricing
Simple, per-encounter.
Get started now
The Cortexiom API is now in private beta. Sign in to the developer portal with your email — no credit card required. Your first 50 encounters are free.
Open the developer portalFor volume pricing or enterprise access, contact us at evolve@synexiomlabs.com
04 — Next Steps
What’s next
Just want to see it work? Try the consumer product at app.cortexiom.com — same reasoning architecture, no integration required.
Ready to integrate? Get your API key at developers.cortexiom.com — 50 free encounters, no credit card.
Building something at scale? Reach out at evolve@synexiomlabs.com for volume pricing or enterprise access.
Not a developer? Explore our consumer and enterprise products.