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7/12/2026
The original title is "Part 1: Authentication Hell: Getting AWS Lambda Talking to X"

The original title is "Part 1: Authentication Hell: Getting AWS Lambda Talking to X"

Original: Part 1: Authentication Hell: Getting AWS Lambda Talking to X

Short summary

A developer documents the painful process of getting AWS Lambda to authenticate with X's API for an autonomous content engine. The key lesson: posting tweets requires OAuth 2.0 User Context (not Bearer Token), and media uploads require OAuth 1.0a credentials. The post walks through debugging 401/403 errors and verifying auth with the v2.me() endpoint before attempting posts.

  • •X API tweet posting requires OAuth 2.0 User Context, not Bearer Token
  • •Media uploads need OAuth 1.0a with four credentials (consumer key/secret + access token/secret)
  • •Debug auth first with client.v2.me() before attempting actual posts

Generated with AI, which can make mistakes.

#ai-tools#ai-agents#open-source
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