# System Zero docs

> System Zero makes structured decisions from text: send a state and named questions, then read probabilities, confidence and typed answers.

API base: `https://api.rightnowai.co/v1`.

## Guides

- [Overview](https://www.rightnowai.co/docs/system-zero): System Zero makes structured decisions from text: send a state and named questions, then read probabilities, confidence and typed answers.
- [Quickstart](https://www.rightnowai.co/docs/system-zero/quickstart): Make a System Zero text decision with a workspace key in cURL, PowerShell, Python or TypeScript, then read the named answer and retry guidance.
- [Authentication](https://www.rightnowai.co/docs/system-zero/authentication): Authenticate System Zero calls from your server with a workspace API key, keep it in the calling process, and replace a lost or revoked key.
- [Decisions](https://www.rightnowai.co/docs/system-zero/decisions): Build a System Zero decision from state and named boolean, choice or score questions, then read the returned answers, probabilities and refusals.
- [Sessions](https://www.rightnowai.co/docs/system-zero/session-affinity): Understand System Zero routing affinity: session_id does not create a persistent session, and the held session routes return an explicit refusal.
- [Idempotency](https://www.rightnowai.co/docs/system-zero/idempotency): Keep the same System Zero Idempotency-Key and JSON body when retrying a decision, and handle conflicts, changed requests and unavailable replays.
- [Workspaces and keys](https://www.rightnowai.co/docs/system-zero/workspaces): Use a System Zero workspace to manage API keys, usage and the Playground, and understand how member roles control access to workspace settings.
- [API reference](https://www.rightnowai.co/docs/system-zero/decide): Call the System Zero decide API with text state and named questions, then inspect structured answers, response headers and validation errors.
- [Errors](https://www.rightnowai.co/docs/system-zero/errors): Read System Zero error codes, HTTP statuses and retry flags, distinguish held inputs from transient failures, and keep the request ID for support.
- [Rate limits](https://www.rightnowai.co/docs/system-zero/rate-limits): Read the System Zero rate-limit headers and refusal codes, pace work to the returned limits, and understand that workspace limits still apply.
- [Versions](https://www.rightnowai.co/docs/system-zero/versions): Choose the System Zero model alias or a pinned version, discover the currently attested model IDs, and understand the retirement notice policy.
- [Models](https://www.rightnowai.co/docs/system-zero/models): Read the authenticated System Zero model list to find the alias target, attested versions, metadata, serving limits and features held at launch.
- [Inputs](https://www.rightnowai.co/docs/system-zero/attachments): Send text state to System Zero and read the exact launch refusals for held image, audio, document and video inputs before preparing a request.
- [Coding agent setup](https://www.rightnowai.co/docs/system-zero/agent-setup): Give a coding agent the System Zero skill and a request example, keep the API key in the calling environment, and check its generated integration.
- [Playground](https://www.rightnowai.co/docs/system-zero/playground): Try System Zero text decisions in the workspace Playground, read structured results, and use its server-held identity without pasting an API key.
- [Leaked API keys](https://www.rightnowai.co/docs/system-zero/leaked-api-keys): Revoke an exposed System Zero API key, create a replacement, update the apps that use it, and keep keys out of browser code, commits and logs.
- [Billing and credits](https://www.rightnowai.co/docs/system-zero/billing-and-credits): Understand System Zero billing at launch: the API is not charged, the console takes no payment, workspace limits apply, and the credits API is held.
- [Questions](https://www.rightnowai.co/docs/system-zero/questions): Find direct answers about System Zero question types, held inputs, retry behavior, workspace access, launch billing and the handling of your data.
- [Support](https://www.rightnowai.co/docs/system-zero/support): Contact RightNow about a System Zero API issue with the request ID, HTTP status and error code so support can investigate the call you identify.
- [Release notes](https://www.rightnowai.co/docs/system-zero/release-notes): System Zero release notes cover text decisions, Playground and launch billing, with links to the guides for access and usage limits.

## Markdown

- [Overview](https://www.rightnowai.co/docs/system-zero/index.md): The same guide in Markdown.
- [Quickstart](https://www.rightnowai.co/docs/system-zero/quickstart.md): The same guide in Markdown.
- [Authentication](https://www.rightnowai.co/docs/system-zero/authentication.md): The same guide in Markdown.
- [Decisions](https://www.rightnowai.co/docs/system-zero/decisions.md): The same guide in Markdown.
- [Sessions](https://www.rightnowai.co/docs/system-zero/session-affinity.md): The same guide in Markdown.
- [Idempotency](https://www.rightnowai.co/docs/system-zero/idempotency.md): The same guide in Markdown.
- [Workspaces and keys](https://www.rightnowai.co/docs/system-zero/workspaces.md): The same guide in Markdown.
- [API reference](https://www.rightnowai.co/docs/system-zero/decide.md): The same guide in Markdown.
- [Errors](https://www.rightnowai.co/docs/system-zero/errors.md): The same guide in Markdown.
- [Rate limits](https://www.rightnowai.co/docs/system-zero/rate-limits.md): The same guide in Markdown.
- [Versions](https://www.rightnowai.co/docs/system-zero/versions.md): The same guide in Markdown.
- [Models](https://www.rightnowai.co/docs/system-zero/models.md): The same guide in Markdown.
- [Inputs](https://www.rightnowai.co/docs/system-zero/attachments.md): The same guide in Markdown.
- [Coding agent setup](https://www.rightnowai.co/docs/system-zero/agent-setup.md): The same guide in Markdown.
- [Playground](https://www.rightnowai.co/docs/system-zero/playground.md): The same guide in Markdown.
- [Leaked API keys](https://www.rightnowai.co/docs/system-zero/leaked-api-keys.md): The same guide in Markdown.
- [Billing and credits](https://www.rightnowai.co/docs/system-zero/billing-and-credits.md): The same guide in Markdown.
- [Questions](https://www.rightnowai.co/docs/system-zero/questions.md): The same guide in Markdown.
- [Support](https://www.rightnowai.co/docs/system-zero/support.md): The same guide in Markdown.
- [Release notes](https://www.rightnowai.co/docs/system-zero/release-notes.md): The same guide in Markdown.

## Agent files

- [Coding agent skill](https://www.rightnowai.co/docs/system-zero/SKILL.md): The skill linked by Coding agent setup.
- [All guides](https://www.rightnowai.co/llms-full.txt): The same guides in reading order.