For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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DocumentationAPI ReferenceChangelog
DocumentationAPI ReferenceChangelog

Changelog

API updates and version history

This changelog documents all changes to the Caesar API. We follow date-based versioning, where each version represents a stable snapshot of the API.

Versioning approach

Caesar uses Stripe-style date-based versioning. Each version is a dated snapshot that remains stable indefinitely. You can pin your integration to a specific version and upgrade on your own schedule.

Set your API version using the API-Version header or pin it to your API key in the dashboard.

August 8, 2025
August 8, 2025

Initial API release

The first public version of the Caesar Research API.

Core features

  • Research endpoint: POST /research for creating research jobs
  • Streaming support: Server-sent events for real-time progress updates
  • OpenAI compatibility: Drop-in compatible endpoints at /compat/completions and /compat/chat/completions

Request parameters

ParameterTypeDefaultDescription
querystringrequiredThe research question
compute_unitsinteger3Number of reasoning iterations
autobooleanfalseEnable automatic parameter selection

Response fields

Each completed research job returns:

  • answer: The synthesized research response
  • results: Array of source citations with URLs and excerpts
  • compute_units_consumed: Actual units used
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