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send-curl-to-claude-text-completion-api.md

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Send cURL To Claude Text Completion API

Here is how we can make a cURL (POST) request to the Claude text completion API. It requires already having a Claude API account with (paid) credits. At this time, you can get $5 in free credits to try it out.

Assuming all that, we can grab an API key, store it somewhere safe and accessible like 1Password, and then start formatting a request.

We need to specify a couple headers as well as POST body parameters.

curl -X POST \
  -H "Content-Type: application/json" \
  -H "x-api-key: $(op item get "Anthropic Claude API Key" --field credential)" \
  -H "anthropic-version: 2023-06-01" \
  -d \
'{
  "model": "claude-2.1",
  "max_tokens_to_sample": 1024,
  "prompt": "Human: Show me an example of a simple Ruby program.\n\nAssistant:"
}' \
  https://api.anthropic.com/v1/complete

The required headers are:

  • "Content-Type: application/json"
  • x-api-key with our API key
  • "anthropic-version: 2023-06-01" (the latest Anthropic API version)

Then, in the body, we specify:

  • the model (e.g. claude-2.1)
  • the max number of tokens you want the model to use
  • a prompt that starts with Human: and then prompts the Assistant:

Note: this is a legacy API and the Messages API should be preferred.

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