🤖 AI & LLMsAnthropic

AttributeError: module 'anthropic' has no attribute 'beta'

Fresh5 months ago

Mar 14, 20260 views

Confidence Score87%

87%

Problem

Hi , I am testing the Anthropic API / MCP integration in Python SDK. I received the error: "AttributeError: module 'anthropic' has no attribute 'beta' Have you run into this ? Any idea if the Python SDK is ready for beta messages API ? my code: [code block] Reference doc/example: https://docs.anthropic.com/en/docs/agents-and-tools/mcp-connector Anthropic SDK version: Version: 0.62.0 Anthropic SDK libraries / namespaces : `['AI_PROMPT', 'APIConnectionError', 'APIError', 'APIResponse', 'APIResponseValidationError', 'APIStatusError', 'APITimeoutError', 'Anthropic', 'AnthropicBedrock', 'AnthropicError', 'AnthropicVertex', 'AsyncAPIResponse', 'AsyncAnthropic', 'AsyncAnthropicBedrock', 'AsyncAnthropicVertex', 'AsyncClient', 'AsyncMessageStream', 'AsyncMessageStreamManager', 'AsyncStream', 'AuthenticationError', 'BadRequestError', 'BaseModel', 'BetaAsyncMessageStream', 'BetaAsyncMessageStreamManager', 'BetaContentBlockStopEvent', 'BetaInputJsonEvent', 'BetaMessageStopEvent', 'BetaMessageStream', 'BetaMessageStreamEvent', 'BetaMessageStreamManager', 'BetaTextEvent', 'Client', 'ConflictError', 'ContentBlockStopEvent', 'DEFAULT_CONNECTION_LIMITS', 'DEFAULT_MAX_RETRIES', 'DEFAULT_TIMEOUT', 'DefaultAioHttpClient', 'DefaultAsyncHttpxClient', 'DefaultHttpxClient', 'HUMAN_PROMPT', 'InputJsonEvent', 'InternalServerError', 'MessageStopEvent', 'MessageStream', 'MessageStreamEvent', 'MessageStreamManager', 'NOT_GIVEN', 'NoneType', 'NotFoundError', 'NotGiven', 'Omit', 'PermissionDeniedE

Error Output

error:
"AttributeError: module 'anthropic' has no attribute 'beta'

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Moderate Confidence Fix

84% confidence100% success rate2 verificationsLast verified Mar 14, 2026

Solution: AttributeError: module 'anthropic' has no attribute 'beta'

Low Risk

Hey! Our instructions on that docs page have a syntax error, which I'm working on fixing now! The actual code should be: [code block]

Trust Score

2 verifications

100% success

Hey! Our instructions on that docs page have a syntax error, which I'm working o

Hey! Our instructions on that docs page have a syntax error, which I'm working on fixing now! The actual code should be:

python

import anthropic

client = anthropic.Anthropic()

response = client.beta.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1000,
    messages=[{
        "role": "user",
        "content": "What tools do you have available?"
    }],
    mcp_servers=[{
        "type": "url",
        "url": "http://a.b.c.d/mcp",
        "name": "xyz01",
   
    }],
    betas=["mcp-client-2025-04-04"]
)

print(response.content)

Validation

Resolved in anthropics/anthropic-sdk-python GitHub issue #1012. Community reactions: 1 upvotes.

Verification Summary

Worked: 2

Last verified Mar 14, 2026

Environment

Submitted by

Alex Chen

2450 rep