NeverMetered
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Use NeverMetered with Anthropic SDK

The official Python and TypeScript clients for the Messages API.

Anthropic Messages
Model
qwen3.8-27b
8,192 max output tokens on the free planReplace YOUR_API_KEY with your key.
  1. 1

    Create an API key

    Create a key in API keys and name it after the tool, for example “Anthropic SDK”. A dedicated key per tool lets you see its usage separately and give it its own parallel-stream cap. The key is shown once; the snippets below use YOUR_API_KEY where it goes.

  2. 2

    Install the SDK

    pip install anthropic
  3. 3

    Export your key

    export NEVERMETERED_API_KEY="YOUR_API_KEY"
  4. 4

    Stream a message

    Use the base URL without /v1; the SDK adds it. The key is sent as the x-api-key header, which the gateway accepts.

    import os
import anthropic

client = anthropic.Anthropic(base_url="https://api.nevermetered.com", api_key=os.environ["NEVERMETERED_API_KEY"])

with client.messages.stream(
    model="qwen3.8-27b",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Reply with the word ready"}],
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)
  5. 5

    Verify it works

    Run the script; it prints the model's reply. The request shows up in Requests within a few seconds, with its input, cached and output tokens.

Tips
  • max_tokens is required by the Messages API. Your plan allows up to 8,192 output tokens per request.
  • Token counting (client.messages.count_tokens) is supported and doesn't use your daily free requests.

Troubleshooting

404 on every request
The base URL probably ends in /v1, so the SDK calls /v1/v1/messages. Use https://api.nevermetered.com.
404 model_not_found
Use a model id exactly as GET /v1/models lists it, for example qwen3.8-27b. Plans can restrict which models a key may call.
429 concurrency_limit_exceeded
All your parallel streams are busy and your queue allowance is full. Lower the tool's parallelism (subagents, batch size), or get more streams on your plan.
Answers stop mid-sentence
The response hit your plan's output cap of 8,192 tokens (finish reason length or max_tokens). Ask for shorter steps, or upgrade for a higher cap.
403 email_verification_required
Free requests need a verified email. Click the link in your verification email (you can resend it from the dashboard), or upgrade.
429 daily_quota_exceeded
You've used today's free requests; agents send one request per step, so they go quickly. The allowance resets at 00:00 UTC, and paid plans have no daily limit.
503 / 504 request_queue_timeout
The service stayed busy longer than the queue timeout and nothing was generated. Retry with backoff, and give the tool a generous request timeout.