One price per reply
Every reply shows what it cost. There is no subscription. New accounts start with a $5 signup credit.
Katara
Chat and build on Katara Cortex. Pay per reply with account credits, or in USDC from a wallet you control.
Credits or USDC
Account credits are bought by card. USDC stays in a wallet only you can spend from: approve a cap once and each reply pulls its exact cost. Replies paid either way can run on Katara Community. Pricing and fees
Verified models
A model on Katara is a pinned bundle: the same weights and settings on every provider, checked by validators that probe providers with known prompts.
Always an answer
If no provider can take a request, a managed fallback answers at a published price. The reply says so.
Three products
Section titled “Three products”Katara is three products on one account: the same organizations, environments, keys and API. Each stands on its own, and none of them requires the others.
Cortex: inference
Models behind one API that speaks the OpenAI Chat Completions and Responses formats and the Anthropic Messages format, so Claude Code, Cursor and the OpenAI and Anthropic SDKs work against it. Requests paid with account credits or USDC run on Katara’s own models and can also run on independent providers in Katara Community. Cortex answers requests; it keeps no agent state. How Cortex answers
Synapse: agents that run and remember
Durable execution for agents: runs that can be inspected, cancelled and scheduled, knowledge and memory an agent draws on, and evaluation that measures whether it is doing its job. Synapse and Locus
Locus: what an agent may do
Authority over actions: the grants and budgets an agent holds, the tools it can call, the policy that decides each action, the approvals a person gives and the governed action that runs after them. Tools and approvals
They meet where one needs what another does. An application can call Cortex with no agent involved. A Synapse agent asks Cortex for inference, and when it reaches outside itself, by calling a tool or spending a budget, Locus decides whether it may. An agent you run yourself can act through Locus without Synapse at all.
Every account has a Test environment and a Live one. Networks says what each settles on, and Product availability how to ask whether a Synapse or Locus service is switched on where you call it.