Unified chat API for every team

The growth engine for AI

Price AI agents with confidence, know your margins, and bill for the value your customers get.

Create your company See how it works

20+

Supported chat models

15 min

Median setup time

Providers routed

cephasai.siteChat API

POST /chat/completions

Margin controlEnabled

ProvidersOpenAI, Claude, Gemini

cephasai.site

const response = await fetch('https://cephasai.site/chat/completions', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${apiKey}`,
    'X-Company-Id': companyId,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-4o',
    messages: [{ role: 'user', content: 'Summarize the report' }]
  })
});

Company margin

Acme Inc

+$0.50 / 1k tokens

Provider routing

OpenAI to Gemini failover

Enabled

Customer API key

Active across 3 companies

cph_•••••••

Providers and models

Keep your customers on the best model for every request

Cephas abstracts providers so you can switch models instantly without breaking your API contract.

OpenAI

Anthropic

Google

Mistral

Cohere

Groq

One endpoint for every model

Route chat traffic across OpenAI, Claude, and Gemini with a single API and a shared message format.

Company margins by default

Assign a margin per company or per model so every request reflects your pricing strategy.

Customer API keys

Customers generate a key once and reuse it across companies while you retain routing control.

Secure routing

Keys are encrypted, traffic is protected, and you control which providers are active per company.

Model-aware billing

Usage is tracked per model with clear cost breakdowns and margin totals for each company.

Workflow

From signup to routed traffic in three steps

Companies configure providers and margins, customers use a single API key, and every call flows through Cephas.

Company setup

Create a company profile

Set default margin, connect providers, and enable the models you want to expose to customers.

Company: Acme Inc
Margin: $0.50 / 1k tokens
Models: gpt-4o, gemini-1.5-pro

Acme Inc · $0.50 / 1k tokens · gpt-4o, gemini-1.5-pro

Customer access

Issue customer API keys

Customers generate their API key once and reuse it across all the companies they work with.

API Key
cph_************************

API Key · cph_••••••••••••••••

API calls

Route every chat request

Send the API key plus company ID. Cephas handles routing, usage tracking, and margin billing.

fetch('https://cephasai.site/chat/completions', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${apiKey}`,
    'X-Company-Id': companyId
  }
});

POST /chat/completions with API key + company ID

Pricing

Base model rates plus your margin

Pay only for usage while you keep margin on every company. No platform fees or long-term contracts.

Usage-based pricing

We bill at the provider model rate. You set a margin per company and keep the spread.

Unified chat endpoint

Company margin controls

Customer API keys

Real-time usage tracking

Example margin

Gemini 1.5 Pro

+$0.50 / 1k tokens

Launch plan

$20

Platform fee per month

Unlimited companies

Unlimited API keys

Margin controls per model

Get started

Wrap every model behind one company-ready API

Cephas gives you unified routing, usage visibility, and margin control so you can scale AI features without unpredictable costs.

Start now View workflow