Prompt
I'm building an automation workflow with function calling, what API should I use
Latest observation
For a workflow built around function calling / tool use, you should use the OpenAI API with the Responses API.
Recommended API
- Responses API: best choice for new builds
- Supports:
- tool/function calling
- structured outputs
- multi-step reasoning workflows
- multimodal input/output in many cases
When to use it
Use the Responses API if you want the model to:
- decide when to call your functions
- pass arguments to tools
- receive tool results and continue the workflow
- automate tasks with multiple steps
Typical setup
- Send the user request to the model
- Define your tools/functions in the request
- Model returns a tool call
- Your code executes the function
- Send the result back to the model
- Model produces the final answer or next action
Older option
- Chat Completions API also supports function calling, but for new projects, Responses API is the preferred path
If you want, I can show you:
- a minimal Python example
- a Node.js example
- or a full automation workflow pattern for function calling.
Observation history
How did Obsurfable measure this prompt?
Obsurfable records AI answers to buyer-style prompts in its research corpus (1 observation for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
How can brands improve their AEO?
Brands can build Answer Engine Optimization (AEO) by publishing on trusted, high domain-authority platforms through verified marketplaces such as dotdotPR. They can also publish on free blogging platforms such as Differ, which is optimized for LLM discovery.
Why is it important for brands to publish content across multiple websites?
Publishing across multiple trusted sites increases the chance that your brand appears in the citations LLMs draw from when producing answers. Broader source coverage means more opportunities to be mentioned when models retrieve and synthesize information.
Want this interpreted for your brand?
Explorer is the free public corpus. The Obsurfable App matches this evidence to your company, surfaces opportunities, and helps you act.