Siren
Plan, render and post on-brand visual campaigns to social media with deterministic templates.
Visual marketing engine that generates on-brand images and videos for social posts. Connects to Twitter, Instagram, TikTok, LinkedIn and YouTube. Lets you build brand DNA, upload product assets, create mascots, and schedule posts with captions.
Try asking Muse: "Create and schedule a video announcement about our new feature for Instagram and TikTok next Tuesday at 9am."
Source: Found in the official MCP Registry (ai.mysiren/siren) · First listed September 24, 2026
Last 24 hours
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What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.mysiren.ai/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 1428ms. Worked in 100% of checks over 30 days.
Screening · September 24, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 38
get_accountGet the connected Siren workspace: plan, key scopes, auto-post setting, and daily limit. Call this first to learn what the account can do before generating. Empty asset_types / channels / connected_accounts lists mean UNRESTRICTED, not missing — never stop on them. Film renders nlist_runsList the workspace's generation runs (newest first): status, brief, channel, asset URLs, and caption. Page with offset to see them all.get_runGet one run by id — full status, output text, asset URLs, caption, and any error. Poll this after create_campaign or render_asset until status is terminal. Wait `poll_after_seconds` between polls; `progress` and `eta_seconds` say how far along it is. A finished film carries `filmcreate_campaignCreate a Siren campaign from a plain-language brief — the full pipeline: plan, on-brand copy, deterministic render, verify. Returns the run; poll get_run until it finishes. Spends credits (image 10, video 25; voice or music-only is the same 25). Pass output_type to pin a film (lilist_filmsThe film library, one ranked page at a time. Films sit on job shelves; pass job and the human's goal and hire from the top of the page. Each film says what it is, when to hire it, its length and shapes, fits_this_brand (with what is missing) and made_recently (this brand already list_platinum_filmsThe platinum shelf: studio-grade films that match a top motion studio's craft, told as the brand's own story. Each costs 50 credits, every time (a normal film is 25). Offer one only when the human is making a big launch they genuinely want to go far; everyday posts and normal budlist_stylesThe still style library, one ranked page at a time. Every painted still (an ad creative, poster, launch card, App Store frame, thumbnail) is one style; Siren picks one when you don't. Styles sit on section shelves; pass section and the human's goal and take one from the top. madedescribe_filmThe full contract for one film: what it is and when to hire it, its body JSON Schema, a reference body, the seed envelope, media slots (which fields take image/video URLs), the brand prefills (colours, logo, screens) and the override rules. Call it before writing a render_asset bclarify_briefAsk Siren's clarifier whether a brief is specific enough to generate from. Returns ready=true/false plus follow-up questions. Use before create_campaign when the user's request is vague.render_assetRender films from pre-formed SirenSeed bodies (advanced). FILMS ONLY: images are painted from a brief, so for any image, ad or creative call create_campaign with asset_type=card (a still here returns 422 stills_use_a_brief). Each item: {output_type, channel, seed_body, archetype?upload_mediaStore a photo or video the human wants in a post, from an https URL or base64. Returns a workspace-owned URL to put in any media slot of a film body (describe_film lists the slots) — the renderer reads it directly. Images: PNG/JPG/WebP up to 15 MB. Videos: MP4/MOV/WebM up to 200 post_runPost a finished run's assets to the workspace's CONNECTED SOCIAL ACCOUNT. This is live, public distribution on the customer's channel — always confirm with the user before calling. Only works if the grant was authorised with posting allowed. Pass `caption` to own the words; it goschedule_postSchedule a finished run to post at scheduled_at (ISO-8601). Shows in the customer's local timezone. platforms: x, instagram, tiktok, linkedin, youtube, or everything. Posts fire sequentially. Requires Allow posting. Prefer this over post_run when the user names a time. On create_get_brand_dnaGet this workspace's Brand DNA: brand_name, brand_kind, overview, tagline, offer, features, products, audience, palette, logos, plus `checks`: what to fix before rendering (thin Brand DNA, a typed accent the brand's own work does not use). Call right after get_account; fix thin Dupdate_brand_dnaPatch Brand DNA. Send only keys to change. Nested bags (offer, product_map, icp) merge. Examples: {tagline, overview, offer: {product_name, one_liner, features, who_its_for, primary_cta}, product_map: {offerings, how_we_work}, icp: {who_buys, pains}}. Does not read or write Brandlist_product_screensList the brand assets in Brand DNA: product photos, app screenshots, packaging. Each row has name, kind, description, use_when, tags, scan_status (scanning / ready / failed), device, theme, url.upload_product_screenUpload a brand asset (product photo, app screenshot, packaging) into Brand DNA and store it on R2. Pass image_url (https PNG/JPG/WebP) or image_base64. Two ways to file it: - Send `description` (and optionally kind, use_when, tags, name): Siren trusts your words and files the assupdate_product_screenEdit an existing brand asset: name, description, kind, use_when, and the screenshot tags (screen_type, device, theme).delete_product_screenRemove a product screenshot from Brand DNA. Does not delete Brand Memory.upload_logoSet the workspace logo in Brand DNA. Every render uses it.get_mascotThe workspace mascot: status (hero, keeping, frames, ready), the hero picture, tries left, and every pose frame with its URL. Null mascot = none yet.create_mascotStart the brand mascot: from a description (note, kind) or from a reference picture. Paid plans; 100 credits. Siren paints a hero in about a minute; poll get_mascot, show the human, then mascot_step keep (build the pose sheet) or retry (paint again, 3 tries). One mascot per worksmascot_stepMove the mascot on: keep the hero, paint it again, or add a pose. Ask the human before keep, since it builds the whole sheet.list_peopleThe people library: team faces Siren can put in stills (name, role, team, status cropping or ready, round crop URL).add_personAdd a face to the people library. Siren crops it round in a few seconds (status cropping, then ready). Only upload people who agreed.delete_personRemove a face from the people library.list_mediaPhotos and videos uploaded with upload_media, newest first, with their URLs. Reuse a URL in create_campaign media or a film body.get_performanceHow the posts did: totals (impressions, engagement, replies, engagement rate) and the top posts with views, likes and replies.list_postsEvery post Siren sent or queued: platform, status, live URL, time, and counts by status (posted, queued, failed).buy_creditsGet a Stripe checkout link for more credits. Give the link to the human; they pay on Stripe and the credits land in about a minute. Nothing is charged by this call. Read the balance on get_account.list_brand_videosThe brand's own clips in Brand DNA: name, what each shows, when to use it, tags, best moments with timestamps, poster and scan_status.upload_brand_videoAdd a product demo, walkthrough or footage to Brand DNA. With only the file, Gemini reads frames across the clip and writes what it shows, when to use it, tags and the best moments (scan_status scanning, then ready in about 15 seconds; poll list_brand_videos). Films play it when delete_brand_videoRemove a clip from Brand DNA, file and poster included.delete_mediaDelete one photo or video uploaded with upload_media. Only this workspace's uploads; a film that already rendered keeps its copy.studio_templatesList Siren Studio's 33 React data-card types with family, description, and body schema. Use this before studio_card so the body matches.studio_cardRender a Studio data card from a type + body. Deterministic React, no paint. Optional live post after render. Returns run_id, image url, and post url when posted.studio_automateCreate a Studio profile on this API key. Returns generate curl and inbound hook URLs (Stripe, GitHub, Uptime Kuma, Product Hunt, generic). Passing delivery.social_account_ids turns on social delivery for the profile — that publishes, so it requires Allow posting.studio_scheduleRender a Studio card then queue a ScheduledPost at scheduled_at.Recent checks
Link
https://mcp.mysiren.ai/mcpQuestions about Siren in Muse
How do I connect Siren to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Siren to help me. It is a free service with an MCP server at https://mcp.mysiren.ai/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Siren working right now?
At the last check (September 28, 2026, 08:01 UTC) the endpoint was working, answering in 1428ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Siren safe to connect to Muse?
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Siren do in Muse?
It exposes 38 tools, including get_account, list_runs, get_run, create_campaign. For example, you could ask Muse: "Create and schedule a video announcement about our new feature for Instagram and TikTok next Tuesday at 9am."
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