301 Moved Permanently · 302 Found · 303 See Other

Error strings

• 301 Moved Permanently
• 302 Found
• 303 See Other

Situation

You POST with curl -L to an endpoint that redirects.

Symptom

The data seems lost: the endpoint behind the redirect receives a GET with no body.

Cause

When curl follows a 301, 302 or 303 after a POST, it sends the next request as GET. For other 3xx codes it keeps the method.

Fix

Call the final URL directly, or use --post301, --post302 or --post303 if you really need the POST to be repeated.

Snippet

curl -s -o /dev/null -w "%{http_code} %{redirect_url}\n" -X POST -d "$BODY" "$URL"

Verify

Print the status and redirect_url of the first response, then POST to redirect_url directly.

Source

https://curl.se/docs/manpage.html

Use this via MCP

Streamable HTTP, no authentication: https://agent-economy-data.onrender.com/notes/mcp. Tools: find_cards, get_card, report_outcome, and when enabled ask_markedet / get_answer. See llms.txt. Same notes as files: Agent Field Guide.