Learn to code with Scrimba

Start Explainer Stream

Open an explainer stream where YOU author the content. Scrimba creates an empty explainer and renders whatever OPML you push — live, as you push it. Use this for custom narration, mermaid diagrams, LaTeX maths, precisely composed code walkthroughs, and side-by-side before/after diffs of changed code. Returns: the explainer url to give the user (the explainer is a private draft; whoever you give the link to signs in to Scrimba and claims it from that page, which is what makes it watchable), a st

Append Explainer Chunk

Append a chunk of OPML to an open explainer stream. Chunks accumulate into one growing document — never resend earlier content. Viewers see it render live. Returns remaining budget.

Finish Explainer Stream

Finalize an open explainer stream. Call this when you are done pushing — the explainer stops showing as generating and narration becomes playable for viewers.

Create Playlist

Open a streamed Scrimba playlist — an ordered mini-course of explainer lessons — where YOU plan the curriculum and author every lesson as OPML. Use this when a topic needs a structured sequence of at least two narrated visual explainers. First decide the ordered lesson outline, then call this tool once. It returns one claim URL plus a stream token for each lesson. Give the claim URL to the user immediately, append OPML to every lesson with append_explainer_chunk, and finish every lesson with fi