API
The complete OpenAI API tutorial
The OpenAI API is the unified entry point for calling GPT-5.6, o-series, GPT Image 2, and GPT-Realtime. This channel takes you from account setup and your first request through real-world Responses API patterns in the Python and Node SDKs, streaming, function calling, error handling, and billing — from zero to production in a week.
14 article(s) total
What you'll learn in this channel
These are the core topics this channel covers. Each featured article unpacks several of them in depth.
- Account & API key
- Python / Node first call
- Responses API
- Streaming
- Function Calling
- Errors & billing
OpenAI API 429 Rate Limit Errors: RateLimitError and SDK Retries Explained
A 429 is two problems in one status: throughput limits vs quota exhaustion. The Python SDK already retries twice and honors Retry-After — this guide explains the mechanics from source.
Read articleopenai-node v7.20.0 Explained: Environment-Variable Vault Credentials, External Storage, and Safety Cases
Six PRs in one openai-node release: environment_variable vault credentials, external storage management, safety case retrieval with two webhook events, a SIP media security field, and a legacy GET fix — each traced to PR and tag sources.
Read articleopenai-python 3.15/3.16 and openai-node 7.18/7.19: Cache Prewarming, Webhook Management, connector_id Deprecation
Six OpenAI SDK releases in one day: prewarm cache warming, client.webhooks endpoint management, connector_id deprecated for post-September-1 models, WebSocket sessions in both languages. Every item traced to its PR.
Read articleThe Responses API Compaction Progress Event: response.compaction.compacting and compaction_trigger
openai-node v7.17.0 adds a Responses API compaction progress event: response.compaction.compacting fires at most once every 30 seconds and carries no summary content. Set in context: trigger item, compact endpoint, context_management.
Read articleopenai-python 3.14.x and openai-node 7.16/7.17: Stream Error Normalization, WebSocket Backpressure, and SSE Fixes
Four OpenAI SDK releases in three days, one theme: reliability — Python normalizes stream errors into SDK exceptions, stringifies error codes, checks max_retries; Node caps WebSocket iterator backpressure and fixes lost terminal SSE events.
Read articleThe Agents API appears in the OpenAI SDK (beta): /agents CRUD, environments, sessions, and vaults
openai-python v3.13.0 / openai-node v7.15.0 (09-10) add the Agents API (beta): reusable Agent CRUD, managed sessions with execution environments, subagents, and credential vaults. Only SDK-source-verifiable facts.
Read articleOpenAI API Key Expiration: expires_in_seconds, Org Policies, and Safe Automation
Service Account API key expiry got its key upgrade in v3.11.0 / v7.13.0: org and project policies can now force expiration with a hard maximum lifetime. Parameter boundaries, code, and an ops checklist, all in one place.
Read articleopenai-python 3.9/3.10 and openai-node 7.11/7.12: Prompt Cache Diagnostics, API Key Expiry, GPT Image 2.5
Four SDK releases in two days, two more for key governance, and two pairs on 09-10: prompt cache diagnostics, key expiry plus org policy, GPT Image 2.5 — and two brand-new API surfaces (Live, Agents). Itemized, with code.
Read articleResponses API vs Chat Completions: Is It Time to Migrate?
The Assistants API is shut down and Chat Completions is in legacy mode. This guide compares the two generations across state management, tool definitions, and built-in capabilities, with a migrate-one-flow-at-a-time path.
Read articleOpenAI Structured Outputs: The Complete Guide to json_schema, strict Mode, and Common Errors
The full path to reliably parseable JSON: the Responses API text.format syntax, strict mode, schema design tips, and troubleshooting for high-frequency errors like passing schema without name.
Read articleResponses API advanced: structured outputs, streaming SSE, Batch API, prompt caching
Responses API advanced usage: JSON Schema strict mode, streaming SSE parsing, Batch API offline cost-cut, prompt caching three-tier cache, cost optimization case studies. From 'it calls' to 'production-grade'.
Read articleOpenAI API Error Handling and Retry: 401/429/5xx Patterns
Production-ready error handling for the OpenAI API: 401/429/500/503/timeout. Exponential backoff + jitter, error budgets, upstream protection, streaming-mode specifics.
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