@agentier/anthropic

Anthropic provider for the agentier framework. Communicates via the Anthropic Messages API (/v1/messages).

Functions

anthropic(config)

Creates an Anthropic ModelProvider. Supports both blocking chat and streaming stream completions. Handles the Anthropic-specific SSE event protocol.

function anthropic(config: AnthropicProviderConfig): ModelProvider

Parameters:

• config — Provider configuration including API key and optional overrides.

Returns: A ModelProvider wired to the Anthropic Messages API.

Example:

import { anthropic } from '@agentier/anthropic'

const provider = anthropic({ apiKey: process.env.ANTHROPIC_API_KEY! })
const response = await provider.chat({
    model: 'claude-sonnet-4-20250514',
    messages: [{ role: 'user', content: 'Hello!' }],
})

---

Interfaces

AnthropicProviderConfig

interface AnthropicProviderConfig {
    apiKey: string
    baseUrl?: string
    apiVersion?: string
    defaultHeaders?: Record<string, string>
    fetch?: typeof globalThis.fetch
}

Property	Type	Description
apiKey	string	Anthropic API key sent via the x-api-key header.
baseUrl	string?	Base URL for API requests. Defaults to https://api.anthropic.com.
apiVersion	string?	Anthropic API version sent via the anthropic-version header. Defaults to '2023-06-01'.
defaultHeaders	Record<string, string>?	Additional headers merged into every request.
fetch	typeof globalThis.fetch?	Custom fetch implementation, useful for proxies or test doubles.