Welcome Aboard
Captain is a deterministic File Search API for unstructured data.
Connect cloud storage, index files, and retrieve source chunks.
Quickstart
New to Captain? Start here to build your first collection.
API Reference
Complete reference for all Captain API endpoints with examples.
File Search API
- Deterministic Retrieval: Ask questions in plain English and get retrieved chunks with source metadata.
- Cloud Storage Integration: Connect AWS S3 or GCS buckets and Captain processes and cleans files over a single API call.
- Multi-Tenancy: Organize collections to scope different teams, folders, projects, etc.
- Chunk-Level Workflow: Use stable chunk IDs, regions, custom metadata, and relations for source-grounded applications.

Complex Docs, Images, and Sheets
Captain can search across very large documents, text-heavy or visual images, and multi-faceted spreadsheets.
Automatic VLM, OCR, and computer vision pipelines support search over visual and text-heavy content.
Getting Help
- Email: support@runcaptain.com
- Website: runcaptain.com
- Sales: runcaptain.com/sales