Quick Answer
The answer is an invalid or missing API key, as a 401 Unauthorized status from the Meraki API directly indicates the request lacks valid authentication credentials. This occurs because the Meraki API requires a valid API key to be included in the `X-Cisco-Meraki-API-Key` header for every request; without it, the server cannot verify the client’s identity and rejects the call. On the Cisco DevNet Associate 200-901 exam, this scenario tests your understanding of REST API authentication mechanisms, specifically how Meraki enforces key-based access. A common trap is confusing a 401 with a 403 Forbidden—remember that 401 means “who are you?” (missing or bad key), while 403 means “you’re known but not allowed.” For a quick memory tip, think “401 = No ID,” so always double-check that your API key is both present in the header and hasn’t been revoked or expired.
This 200-901 practice question tests your understanding of cisco platforms and development. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Python script uses the Cisco Meraki API to fetch the list of organizations. The script fails with a 401 HTTP status. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The API key is invalid or missing.
401 Unauthorized means authentication failure.
The API request exceeded the rate limit.
Why wrong: Rate limit returns 429.
The API key does not have permission to list organizations.
Why wrong: Permission issues return 403.
The API endpoint URL is incorrect.
Why wrong: Incorrect endpoint yields 404, not 401.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The API key is invalid or missing.
A 401 HTTP status indicates 'Unauthorized', which in the context of the Meraki API means the request lacks valid authentication credentials. The most common cause is an invalid or missing API key, as the Meraki API requires a valid API key in the `X-Cisco-Meraki-API-Key` header for all requests.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The API key is invalid or missing.
Why this is correct
401 Unauthorized means authentication failure.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The API request exceeded the rate limit.
Why it's wrong here
Rate limit returns 429.
The API key does not have permission to list organizations.
Why it's wrong here
Permission issues return 403.
The API endpoint URL is incorrect.
Why it's wrong here
Incorrect endpoint yields 404, not 401.
Common exam traps
Cisco often tests the distinction between HTTP 401 (authentication failure) and 403 (authorization failure), and candidates frequently confuse these status codes, especially when the API key is valid but lacks permissions for a specific resource.
Detailed technical explanation
The Meraki API uses API keys as bearer tokens, passed in the `X-Cisco-Meraki-API-Key` header. A 401 response is triggered when the key is missing, expired, revoked, or malformed. Under the hood, the Meraki dashboard validates the key against its database; if the key is not found or is inactive, the server immediately rejects the request before any authorization checks occur.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
The correct answer is: The API key is invalid or missing. — A 401 HTTP status indicates 'Unauthorized', which in the context of the Meraki API means the request lacks valid authentication credentials. The most common cause is an invalid or missing API key, as the Meraki API requires a valid API key in the `X-Cisco-Meraki-API-Key` header for all requests.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.
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