API reference

VectorAxis API

The VectorAxis AI gateway: OpenAI, Anthropic and Cohere compatible inference, and the management API for virtual keys, prompts, routing configs, guardrails, observability, the MCP Gateway and the AI Trust Pack.

Base URL https://api.vectoraxis.ai. Every path below is the full HTTP path. With the OpenAI SDK set base_url to https://api.vectoraxis.ai/v1; with the Claude SDK, to https://api.vectoraxis.ai (the SDK adds /v1/messages). The whole reference is generated from the API's OpenAPI document, https://api.vectoraxis.ai/v1/openapi.json, which you can also feed to an SDK generator or an API client.

Authentication

AuthorizationBearer va_
A platform API key (va_...), created under Settings > API keys. Scoped to an organization or one workspace, with an admin or member role. Used by the management API.
AuthorizationBearer <slug>.<secret>
A virtual key's API key (vk-....<secret>), as Authorization: Bearer. What the OpenAI SDK sends from its api_key. Used by the inference endpoints.
x-virtual-keyheader
A virtual key's API key in the x-virtual-key header, for clients that keep Authorization for something else.
x-api-keyheader
Direct credentials: the provider's own API key in x-api-key, with the provider named in x-provider (for example openai). On /v1/messages a virtual key is accepted in x-api-key too, which is what the Claude SDK sends.

Gateway behaviour shared by the inference endpoints (caching, retries, fallbacks, guardrails, routing configs) is controlled with request headers: see Request headers.