1. Install & Setup Install Solid – Claude API from Bubble marketplace.

Go to Plugins tab → Solid Claude API → paste your Anthropic API key in Settings.
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2. Configure Shared Settings
Plugin auto-sets headers (x-api-key, anthropic-version: 2023-06-01).
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Add shared params: max_tokens (e.g. 1000), model (e.g. claude-3-5-sonnet-20240620).

3. Create API Calls
In Plugins → API Calls:
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Click "Create Messages call" (or similar pre-made).

POST to https://api.anthropic.com/v1/messages.

Body (JSON): Use fields like messages, system, tools.

Or use existing "Count tokens/Complex prompt" call.

4. Use in Workflows
Page workflow (e.g. button click):

Add Plugins → your Claude call.

Dynamic inputs: messages: [{"role":"user","content": Input's value}].

Access result: Result of step 1 (Claude call)'s content → text.