infr.ad: Free OpenAI-compatible LLM API funded by terminal ads

infr.ad has launched a free, OpenAI-compatible API with no credit card, billing, or trial, supported by occasional ASCII ads in terminal responses. The service exempts agent workloads such as tool use, structured output, and long system prompts, leaving tools like aider, Cursor, and Continue unaffected.

LLM API

Developer Tools

Open Source Business Model

infr.ad offers a free, OpenAI-compatible API with no credit card, billing, or trial; costs are covered by occasional ASCII ads in terminal responses.
Requests using tools, structured output, or long system prompts are exempt from ads, so agent tools like aider, Cursor, and Continue are unaffected.
Users sign in with GitHub and receive an API key in about a minute; the service provides three models across two environment variables.

The service could introduce a new monetization model for developer tools by embedding ads into their output, though no independent verification of its performance, reliability, or ad frequency is yet available.

Sources