AI Provider Setup · BYOK

Connect Anthropic (Claude)

Claude Opus, Sonnet, and Haiku straight from Anthropic.

Anthropic is the maker of Claude — the model Admaxxer itself is built on. Connect directly if you want first-party prompt caching, the lowest per-token latency on Claude, or your org already has an Anthropic enterprise agreement.

Best used for

Key details

Where to generate your key
https://console.anthropic.com/settings/keys
Expected key format
Starts with sk-ant-
Environment variable name (if self-hosting)
ANTHROPIC_API_KEY
Provider pricing
https://www.anthropic.com/pricing
Official docs
Anthropic API docs

Step-by-step setup

  1. 1 Create an Anthropic Console account

    Go to console.anthropic.com and sign up with your work email. Anthropic separates Console (API) from claude.ai (chat) — you need the Console one.

  2. 2 Add billing

    Open Settings then Billing and add a card. Anthropic requires a payment method before the API will accept any requests, even for trial credits.

  3. 3 Open the API Keys page

    Navigate to console.anthropic.com/settings/keys. You may need to select a workspace first if your org has more than one.

  4. 4 Click Create Key and name it Admaxxer

    Labels help you rotate later. We recommend one key per app so you can revoke just Admaxxer if it ever leaks.

  5. 5 Copy the key — shown only once

    The full key starts with sk-ant-api03- and is displayed exactly one time. Paste it somewhere safe before closing.

  6. 6 Paste into Admaxxer

    Go to Settings then AI Providers, find the Anthropic row, paste the key, and click Connect. Admaxxer runs a one-token test call to verify.

  7. 7 Pick your default model

    We recommend claude-opus-4-7 — best reasoning and tool use, 200K context. Use claude-sonnet-4-6 for cheaper day-to-day work.

  8. 8 If the connection test fails

    Make sure the key starts with sk-ant-, billing is active in Console, and your workspace has API access enabled.

Test the connection inside Admaxxer

Once you've pasted your key into /settings/ai-providers, hit Test. Admaxxer makes a single no-cost call against the provider's /v1/models (or equivalent) endpoint and reports back:

Available models

These are the pinned model IDs Admaxxer tests against. The model picker in chat will show these plus any live-catalog entries the provider returns.

Model ID Display name Context Tools Best for
claude-opus-4-7 Claude Opus (recommended) 200K Yes Top-tier reasoning and tool use. The default we ship with for Admaxxer chat.
claude-sonnet-4-6 Claude Sonnet 200K Yes Roughly 5x cheaper than Opus, still strong on tool use. Good for agent loops.
claude-haiku-4-5-20251001 Claude Haiku 200K Yes Fastest Claude. Use for quick classification, short summaries, batch work.

Common errors and fixes

401

When it happens: Immediately on Connect, if the key is wrong or revoked.

Fix: Go to console.anthropic.com/settings/keys, create a fresh key, paste it in.

429

When it happens: When you exceed per-minute or per-day token limits.

Fix: Anthropic rate-limits by org tier. Check console.anthropic.com/settings/limits and request a tier bump if needed.

402

When it happens: If billing is not set up or the card on file was declined.

Fix: Open console.anthropic.com/settings/billing and confirm the card is active.

529

When it happens: Overloaded — a rare capacity error under peak demand.

Fix: Retry after a short backoff. If it persists, switch to a Sonnet-tier model or via OpenRouter.

model_not_found

When it happens: If the model id is stale or not enabled for your account.

Fix: Use claude-opus-4-7 or claude-sonnet-4-6. Enterprise-only models need activation in Console.