Mostly CLI
Post from your terminal.
Generate an on-brand carousel, schedule it to TikTok and Instagram, and call every Mostly tool from the command line or the coding agent you already use.
~/northbrew — zsh
$ mostly slides generate --prompt "5 cold brew mistakes" --aspect-ratio 4:5 --wait Planned "5 Cold Brew Mistakes You're Making". Rendering slides… Rendering… 4/6 slides 5 Cold Brew Mistakes You're Making · 6/6 slides rendered 1. Your grind is too fine https://media.mostly.so/s/dk_8f2a91/1.webp 2. You steep it for 4 hours https://media.mostly.so/s/dk_8f2a91/2.webp … Studio: https://mostly.so/create/slides/dk_8f2a91 $ mostly integrations list PLATFORM ACCOUNT STATUS TIKTOK northbrew ACTIVE INSTAGRAM northbrew.co ACTIVE $ mostly posts create --deck dk_8f2a91 --platform tiktok,instagram --caption "Save this before your next batch" --at "2026-11-06 09:00" --publish Schedule for Fri, Nov 6, 9:00 AM to TikTok @northbrew, Instagram @northbrew.co? [y/N] y Scheduled po_3kq9z for Fri, Nov 6, 9:00 AM → TikTok @northbrew, Instagram @northbrew.co
Works with your agent
Ask in words. It runs the commands.
Any agent with a terminal can drive Mostly. No plugin to install: add one line to your agent instructions and it reads --help like you would.
Claude Code“Make a 6-slide carousel on our oat latte and schedule it to TikTok for Friday 9am.”
Cursor“We just shipped dark mode. Turn the changelog into a LinkedIn carousel draft.”
Codex“Retry every post that failed this week and tell me what went wrong.”
Commands
Small commands. Whole workflows.
Every command takes --json, prints progress to stderr and exits non-zero on failure, so it pipes into jq and scripts as easily as it reads in a terminal.
mostly slides generate --prompt "…" --waitDecks on brand
Plans the story, writes the headlines and renders every slide with your brand kit. Prints the image URLs when it's done.
mostly posts create --deck <id> --platform tiktok,instagramDrafts, never surprises
Saves a carousel post to every connected account as a draft. Nothing goes out until you publish it.
mostly posts publish <id> --at "+1d"Schedule in plain time
ISO, local wall time or +2h. Asks you to confirm in a terminal; agents need --yes after you approve.
mostly posts list --status failedSee what shipped
Scheduled, published and failed posts with per-platform links. Retry or cancel in one command.
mostly storyboard render <id> --max-credits 150Video with a ceiling
Scene-by-scene video that never spends past your limit. Without one it prints the price and stops.
mostly call <tool> --args '{…}'Every tool, raw
Research, brand memory, products, generations: anything the MCP server exposes, as JSON in and out.
One backend
CLI, MCP and API. Same Mostly.
All three call the same services as the Mostly app. A deck you generate from the terminal shows up in your library, uses your brand kit and spends the same credits. Pick whichever fits the job.
Mostly services
- Brand kit & products
- Credits & limits
- Decks, videos & posts
- Connected accounts
Install it. Ask your agent.
Grab an API key in Settings, run one command and your next carousel is a sentence away.