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anthropic.com
Call Anthropic Claude API with tool use
domain:
anthropic.com
· 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps
POST /v1/messages with model, max_tokens, messages, tools array (name, description, input_schema)
On stop_reason 'tool_use', read the tool_use content block (id, name, input)
Execute the tool; append a user message with tool_result block referencing tool_use_id
Loop until stop_reason is end_turn
Known gotchas
max_tokens is REQUIRED on /v1/messages (unlike OpenAI) — omitting it is a 400
tool_result must be in a USER-role message with the exact tool_use_id
anthropic-version header is required on every request
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