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Functioncalling.ai

Prototype and test function schemas for GPT models by running prompts and iterating on the results.

A prototyping tool that lets developers design and test function schemas for OpenAI's GPT models before writing code. It solves the problem of iterating on structured outputs by allowing users to run prompts against schemas and adjust them in real time. The tool targets software developers and engineering teams building AI-powered applications, typically at startups or small companies. It is delivered as a SaaS subscription or a one-time lifetime license, with a focus on rapid iteration and ease of use.

Key features

  • Prototype function schemas
  • Run prompts against schemas
  • Adjust and repeat iterations
  • Full access to all features
  • Free updates and support
  • 14-day money-back guarantee
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GTM channels
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ICP
  • Software developers
  • Engineering teams
  • Startups