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Fhddos gives you access to Anthropic’s Claude models through the standard Anthropic Messages API protocol. You get the same request and response shapes you’d use with Anthropic directly, but you authenticate with a single Fhddos token — no Anthropic account or API key needed. Claude excels at complex reasoning, long-form code generation, enterprise Agent workflows, and multimodal tasks including vision.

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Set Up Your Environment

export BASE_URL="https://aiapi.fhddos.com"
export TOKEN="your-fhddos-token"

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Quick Test

Verify your setup with a simple messages call: 
curl -X POST "$BASE_URL/v1/messages" \
  -H "Authorization: Bearer $TOKEN" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 256,
    "messages": [
      {"role": "user", "content": "Hello! Briefly introduce yourself."}
    ]
  }'

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Available Models

ModelStrengths
claude-opus-4-6Complex reasoning, long-form coding, and enterprise Agent orchestration
claude-sonnet-4-6Balanced capability and cost — ideal for coding, Agent tasks, and enterprise workflows
claude-haiku-4-5Low latency, high throughput, cost-efficient for high-volume use cases
Start with claude-sonnet-4-6 for most workloads. Upgrade to claude-opus-4-6 for tasks that require deep reasoning or extended Agent loops, and switch to claude-haiku-4-5 when throughput and cost are the priority.

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Capabilities

Text and code — Generate, explain, refactor, and debug code across all major languages. Summarise documents, extract structured data, translate, and compose long-form content. Vision — Pass image blocks directly inside the messages array. Claude reads base64-encoded images or image URLs using the same field structure as the Anthropic Messages API. Tool calling — Define functions in the tools array and let Claude decide when to invoke them, parse structured outputs, and chain multi-step reasoning. Streaming — Add "stream": true to any messages request to receive tokens as server-sent events, enabling low-latency chat experiences.

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Authentication

Every request to Fhddos uses a Bearer token — the same token across all Fhddos APIs: 
Authorization: Bearer <your-fhddos-token>
You do not need an Anthropic API key. Provide your Fhddos-issued token in the Authorization header (or as the api_key field when using the Anthropic SDK). Fhddos handles the upstream routing.

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Explore the Claude API

Messages API

Text, vision, tool calling, and streaming through the Anthropic Messages protocol

Claude Code

Install the Claude Code CLI and point it at Fhddos in minutes