Claude API
Buy Claude API access — Sonnet, Opus and Haiku — at a fraction of official pricing. OpenAI-compatible, pay only for what you use.
Get an Anthropic Claude API key without a corporate account or overseas card. APIMaster gives you Claude Sonnet, Opus and Haiku at a fraction of Anthropic's list price, billed strictly per token. One key also works across GPT and DeepSeek, and it's OpenAI-compatible — drop it straight into Claude Code, Cursor, Codex or any OpenAI SDK by changing the base URL.
チャネル 32
フィンガープリント履歴
検出データなし
稼働状況
チャネル 42
フィンガープリント履歴
検出データなし
稼働状況
検出データなし
チャネル 04
フィンガープリント履歴
稼働状況
チャネル 44
フィンガープリント履歴
検出データなし
稼働状況
検出データなし
チャネル 03
フィンガープリント履歴
稼働状況
Every channel is fingerprint-checked before it's listed, so you get the real Claude — not a silently swapped, weaker model.
Claude API — Pricing
| Model | Our price | Official | Save |
|---|---|---|---|
| Sonnet 4.6 | $0.4031/M | $3/M | 87% |
| Opus 4.7 | $0.6718/M | $5/M | 87% |
| Opus 4.8 | $0.6718/M | $5/M | 87% |
Capabilities
Ultra-long context
Huge context windows for long documents, whole codebases and multi-turn agents.
Advanced reasoning
Strong multi-step reasoning, analysis and instruction-following on complex tasks.
Coding & agents
Top-tier code generation, refactoring and tool use — excellent with Claude Code, Cursor and agent frameworks.
Use cases
Quick start
curl https://apimaster.ai/v1/chat/completions \
-H "Authorization: Bearer $APIMASTER_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-sonnet-4-6",
"messages": [{ "role": "user", "content": "Hello" }]
}'Claude API — よくある質問
Which Claude models are available?
Currently available: claude-sonnet-4-6, claude-opus-4-7, claude-opus-4-8 — the same models Anthropic offers, all reachable through one key.
Which Claude model should I choose?
Pick Haiku for fast, low-cost tasks; Sonnet for the best balance of speed and quality; Opus for the most complex reasoning and analysis.
How is it billed? Is there a minimum?
Billed per token (input + output) — see the price table above. Pay-as-you-go with Alipay, WeChat Pay, USDT and credit card, from as little as $1.
Is it compatible with the Anthropic SDK and Claude Code?
Yes. We expose both an OpenAI-compatible endpoint and an Anthropic-style one: Cursor, Codex and any OpenAI SDK just need the base URL changed; for Claude Code, set ANTHROPIC_BASE_URL and your key.
Is my data safe?
Yes. Your API data is not stored or used for training, and all requests are sent over encrypted connections.
Why is it cheaper than buying from Anthropic directly?
We aggregate volume across channels and bill strictly per token with no minimums, so the effective price lands well below Anthropic's official list price.
Other models
はじめ方
コードやエージェントに組み込む
APIMaster keyとbase URLを差し替えるだけで、OpenAI互換のあらゆるツール（Claude Code, Cursor, LangChain, LiteLLMなど）で動作します。
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