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With one Capriole AI API key, any coding agent that accepts a custom endpoint can run GPT-6 Astra, Claude Fable 5.1, and Opus 5.5 at up to 92% less than official API prices.

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Other agents

Most coding agents can use Capriole AI if they let you set a custom endpoint. Use the values below for the protocol that the agent supports. Chat Completions is the simplest choice, because it serves every model. To use the same key in the agents that have their own page, see Use one API key with coding agents.

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Authentication

Capriole AI accepts the key only as a Bearer token in the Authorization header. If an agent sends the key in an x-api-key header, which many Anthropic clients do, set a custom Authorization: Bearer YOUR_CAPRIOLE_AI_API_KEY header or use the agent’s OpenAI-compatible option instead. An API key needs a Premium plan (USD 8 per month, also includes unlimited web chat) or a Team plan (Subscribe).

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Request an agent

If you want a setup page for another coding agent, contact us with the agent name and its official configuration docs.
Last modified on October 30, 2026