# Secnd documentation

Typed decisions with Ren 1.1. Private beta; examples are illustrative.

- [Introduction](https://docs.secndai.com/index.md): A situation and a typed question in. A calibrated answer out.
- [Quickstart](https://docs.secndai.com/quickstart.md): Make one request with curl, Python, or TypeScript.
- [Authentication](https://docs.secndai.com/authentication.md): Keep bearer keys on your server.
- [Models](https://docs.secndai.com/models.md): Pin a model before tuning a workflow.
- [Changelog](https://docs.secndai.com/changelog.md): Track the API contract and model identifiers.
- [Question types](https://docs.secndai.com/primitives/index.md): Choose the smallest question that expresses your decision.
- [Choice](https://docs.secndai.com/primitives/choice.md): Select one of the alternatives your application can handle.
- [Score](https://docs.secndai.com/primitives/score.md): Express an ordered rubric rather than asking for free-form numbers.
- [True/false](https://docs.secndai.com/primitives/true-false.md): Ask whether one stated proposition holds.
- [Probability and the gate](https://docs.secndai.com/confidence.md): Use probabilities to route review, with an explicit risk policy.
- [Patterns](https://docs.secndai.com/patterns/index.md): Keep code in control while the model judges narrow questions.
- [Confidence routing](https://docs.secndai.com/patterns/confidence-routing.md): Use the returned action to choose automation or review.
- [Escalate to a human](https://docs.secndai.com/patterns/escalate-to-human.md): Make uncertainty an explicit operational path.
- [Companion true/false check](https://docs.secndai.com/patterns/companion-check.md): Check category fit before trusting a forced choice.
- [Batching and concurrency](https://docs.secndai.com/patterns/batching.md): Fan out independent decisions without inventing a batch endpoint.
- [Cookbooks](https://docs.secndai.com/cookbooks/index.md): Concrete decision boundaries for common workflows.
- [Support triage](https://docs.secndai.com/cookbooks/support-triage.md): Suggest a support queue while preserving a fallback.
- [Refund decision](https://docs.secndai.com/cookbooks/refund-decision.md): Separate a refund recommendation from payment execution.
- [Content moderation](https://docs.secndai.com/cookbooks/content-moderation.md): Classify against a stated policy and retain human appeal.
- [Lead routing](https://docs.secndai.com/cookbooks/lead-routing.md): Route expressed product needs to the right sales workflow.
- [Tool selection](https://docs.secndai.com/cookbooks/tool-selection.md): Choose from a fixed allowlist, then validate arguments in code.
- [Document classification](https://docs.secndai.com/cookbooks/document-classification.md): Classify the document you can actually fit in the request.
- [SDKs](https://docs.secndai.com/sdk/index.md): Use a thin typed client or call the HTTP API directly.
- [Python](https://docs.secndai.com/sdk/python.md): Synchronous and asynchronous clients with typed errors.
- [TypeScript](https://docs.secndai.com/sdk/typescript.md): Use typed requests, bounded retries, and cancellation.
- [Request limits](https://docs.secndai.com/limits.md): Reject oversized input rather than silently shortening it.
- [Errors](https://docs.secndai.com/errors.md): Use the HTTP status and the shared JSON error envelope.
- [Rate limits and usage](https://docs.secndai.com/rate-limits.md): Budget requests across keys and the whole account.
- [Where the model fails](https://docs.secndai.com/honest-limits.md): Design around uncertainty, incomplete categories, and changing data.
- [API reference](https://docs.secndai.com/api-reference/index.md): Every gateway endpoint, parameter, schema, and response from the OpenAPI contract.
- [Make a decision](https://docs.secndai.com/api-reference/decide.md): Send one typed question and receive a structured answer.
- [List models](https://docs.secndai.com/api-reference/list-models.md): Discover the pinned model, aliases, configured price, and limits.

- [OpenAPI contract](https://docs.secndai.com/openapi.json)