Make your first API call in three steps

Sign in to SeaLink, then create an API Key from your dashboard. The full key string is only shown once upon creation — afterwards, SeaLink only displays the prefix. We recommend copying it right away. If you lose a key, you can always rotate it from the dashboard to generate a new one.

For OpenAI SDKs and most tools, you only need to change the base_url and api_key. We recommend sending one real request with your target model to verify before going live.

curl --request POST \
  https://api.sealink.io/v1/chat/completions \
  -H "Authorization: Bearer $SEALINK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-5-5",
    "messages": [
      { "role": "user", "content": "Hello, SeaLink." }
    ]
  }'

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.sealink.io/v1",
    api_key=os.environ["SEALINK_API_KEY"],
)

response = client.chat.completions.create(
    model="claude-opus-5-5",
    messages=[{"role": "user", "content": "Hello, SeaLink."}],
)

print(response.choices[0].message.content)

export ANTHROPIC_BASE_URL=https://api.sealink.io/anthropic
export ANTHROPIC_API_KEY=$SEALINK_API_KEY

claude

• A 'choices' field in the response means the model returned content successfully.
• A 'usage' field means token accounting was recorded for this request.
• If the request fails, check the error code first: 402 usually means balance, budget, or spend-limit issues; 503 with error.code billing_circuit_open means platform usage is paused for billing review and is not fixed by topping up.