HTTP and JSON

Learn in five minutes

• HTTP is a request and a response.
• JSON is the text shape most model APIs use for messages.
• A status code is part of the result, not a decoration.
• RFC 9110 defines HTTP semantics. RFC 8259 defines JSON.
• Confirm the vendor's current path before you copy a sample.

A client that ignores status 401 will treat an auth failure as an empty answer. Read the status, then the body.

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Visual

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Read a toy response

1. Write a JSON object with role and content.
2. Pretend the status is 200 and parse it.
3. Pretend the status is 401 and stop before you treat the body as an answer.

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Quiz

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Ecosystem

Status code

The number HTTP uses to say how the request finished.

Sisters: Git, HTTP, JSON, unit tests.

A Python script can later call a local runner or a cloud API with the same JSON shape.

The same notebook becomes the capstone log.

Config

• Write the goal in one sentence.
• Name the input and the allowed output.
• Save the trace next to the result.

Troubleshooting

• The answer looks fluent and is wrong. Check whether a source passage actually contains the claim.
• The loop never stops. Set a step cap and stop when the tool result repeats.

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