Siren
Deterministic visual marketing engine. Your agent plans, renders, and posts on-brand campaigns.
| Endpoint | https://mcp.mysiren.ai/mcp (streamable-http) |
|---|---|
| Registry version | 1.1.0 |
| Now | 45 tools · grade D (57) · pin ts_eaa4acc608d3e521599fa101a5772fac · protocol 2025-06-18 |
| First / last listed | 2026-11-01 02:10 UTC / 2026-11-01 02:10 UTC |
| Grade over time | 2026-11-01: D (57), 45 tools |
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Tools: get_account list_runs get_run create_campaign list_films list_platinum_films list_styles describe_film clarify_brief render_asset upload_media edit_asset post_run schedule_post get_brand_dna update_brand_dna list_product_screens upload_product_screen update_product_screen delete_product_screen upload_logo get_mascot create_mascot mascot_step list_people add_person delete_person list_media get_performance list_posts buy_credits list_brand_videos upload_brand_video delete_brand_video delete_media studio_templates studio_card studio_automate studio_schedule studio_start studio_edit studio_get studio_design_pack studio_threads studio_export
get_account | Get 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. Films render on every plan; credits are the only meter. params: none |
list_runs | List the workspace's generation runs (newest first): status, brief,
channel, asset URLs, and caption. Page with offset to see them all. params: limit, offset |
get_run | Get 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 `film_check`, advice only: when `ok` is
false, show the human the video and the findings and let them decide.
Re-render at mo params: run_id* |
create_campaign | Create 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, an ad set of 3 images 20,
video 25; voice or music-only is the same 25). Pass output_type to
pin a film (list_films has the catalog); omit it and Siren picks.
Optional scheduled_at (ISO-8601)
queues a params: brief*, channel, asset_type, output_type, caption, scheduled_at, timezone, platforms, voiceover, direction, music, media, variants, brand |
list_films | The 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 got it: prefer another film on the shelf unless
the human asked for that one). Page on with next_page. Want it all at
on params: job, goal, page, page_size, max_seconds, narrated, aspect, detail, search, all, for_brand |
list_platinum_films | The 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 budgets use list_films. Say the price before you render. Ids end
in -plt. Platinum needs a paid plan or a credit top-up: a params: none |
list_styles | The 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. made_recently = this brand already got that look,
prefer another. To paint in a style, put its id in the
create_campaign bri params: section, goal, page, page_size, search, aspect, all |
describe_film | The 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 body. params: output_type* |
clarify_brief | Ask 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. params: brief* |
render_asset | Render 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?, family?, surface?, caption?, voice_id?,
music?, direction?, brand_override?}. Prefer create_campaign unless
the user h params: items*, name |
upload_media | Store 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 MB. The same bytes are stored once (content-hashed). params: url, base64, kind, name |
edit_asset | Edit a finished ad creative in place. Only what the instruction
names changes; faces, layout, lettering and every other pixel are
kept, so you can chain edits (hair pink, then tail teal, then add a
sign) without the picture drifting. About 15 seconds. 3 credits; an
instruction that asks for a whole new look ("make it a comic",
"make it cinematic") repaints at 10. Returns the NEW run: poll get_run
params: run_id*, instruction* |
post_run | Post 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 goes out verbatim. The call queues the post behind a short
publish window (about two minutes, cancellable) rather than fir params: run_id*, platform, caption |
schedule_post | Schedule 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_campaign you can pass scheduled_at instead. params: run_id*, scheduled_at*, timezone, platforms, captions |
get_brand_dna | Get 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 DNA first with update_brand_dna and
upload_product_screen, or ask the human for the site. Not Brand
Memory. params: none |
update_brand_dna | Patch 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 Brand Memory. params: fields* |
list_product_screens | List 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. params: none |
upload_product_screen | Upload 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 asset as-is. No read.
- Send only the file: Gemini reads the picture and writes name, kind,
description, use_when, tag params: image_url, image_base64, name, description, kind, use_when, tags, screen_type, device, theme |
update_product_screen | Edit an existing brand asset: name, description, kind, use_when,
and the screenshot tags (screen_type, device, theme). params: screen_id*, name, description, kind, use_when, screen_type, device, theme |
delete_product_screen | Remove a product screenshot from Brand DNA. Does not delete Brand Memory. params: screen_id* |
upload_logo | Set the workspace logo in Brand DNA. Every render uses it. params: image_url, image_base64, variant |
get_mascot | The workspace mascot: status (hero, keeping, frames, ready), the
hero picture, tries left, and every pose frame with its URL. Null
mascot = none yet. params: none |
create_mascot | Start 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 workspace. params: note, kind, style, name, image_url, image_base64 |
mascot_step | Move the mascot on: keep the hero, paint it again, or add a pose.
Ask the human before keep, since it builds the whole sheet. params: action*, note, label, prompt, with_model |
list_people | The people library: team faces Siren can put in stills (name,
role, team, status cropping or ready, round crop URL). params: none |
add_person | Add a face to the people library. Siren crops it round in a few
seconds (status cropping, then ready). Only upload people who agreed. params: image_url, image_base64, name, role, team |
delete_person | Remove a face from the people library. params: person_id* |
list_media | Photos and videos uploaded with upload_media, newest first, with
their URLs. Reuse a URL in create_campaign media or a film body. params: none |
get_performance | How the posts did: totals (impressions, engagement, replies,
engagement rate) and the top posts with views, likes and replies. params: window |
list_posts | Every post Siren sent or queued: platform, status, live URL, time,
and counts by status (posted, queued, failed). params: limit, offset |
buy_credits | Get 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. params: pack_id, credits |
list_brand_videos | The brand's own clips in Brand DNA: name, what each shows, when to
use it, tags, best moments with timestamps, poster and scan_status. params: none |
upload_brand_video | Add 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 a brief names it ("launch film with our checkout
demo"). Videos are for films; stills are painted from pictures. params: url, base64, name, description, use_when, tags |
delete_brand_video | Remove a clip from Brand DNA, file and poster included. params: video_id* |
delete_media | Delete one photo or video uploaded with upload_media. Only this
workspace's uploads; a film that already rendered keeps its copy. params: url* |
studio_templates | List Siren Studio's 33 React data-card types with family, description,
and body schema. Use this before studio_card so the body matches. params: none |
studio_card | Render 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. params: output_type*, body*, theme, accent, aspect, post, caption, platform |
studio_automate | Create 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. params: name*, output_types*, delivery, caption |
studio_schedule | Render a Studio card then queue a ScheduledPost at scheduled_at. params: output_type*, body*, scheduled_at*, platforms, caption, timezone |
studio_start | Start a video in Siren Studio from a description. Siren composes the
first take (about 10 to 20 seconds) and replies with what it made;
nothing is rendered or charged until studio_export. Returns the thread
and Siren's reply. The human sees the same thread in Studio and can
keep editing it there, or you can with studio_edit. params: prompt*, template, surface, attachments |
studio_edit | Change a Studio video by asking, as the human would in the chat.
Only what the ask names changes; Siren replies with what it changed
(before and after) and the new version number. Waits up to about 25
seconds for the reply. No credits are spent until studio_export. A greeting
or a question gets an answer and no new version. params: thread_id*, text*, attachments |
studio_get | One Studio video: the chat so far (who said what, with diffs),
every version, and which version is current. params: thread_id* |
studio_design_pack | The design tokens behind a Studio design, for building in the same
language: palette, fonts, radius and shadow as `tokens`; `css` (custom
properties plus a Tailwind v4 @theme block); `tailwind` (a v3 theme);
and `skill_md`, a short rules file to drop into the project so the
agent keeps to it.
Call it once the version has been exported, so `screens` carries the
rendered proofs and `exported` is tr params: thread_id*, version |
studio_threads | The workspace's Studio videos, newest first: title, shelf, current
version, and whether a human or an agent started it. params: none |
studio_export | Render a Studio design or video to files. Spends credits like any
render: a video 25 (platinum 50), a card 10, a set 10 a slide (an App
Store set of 6 is 60), charged once. A card or a set waits for the
render (about a minute) and returns every file in `asset_urls`, slide
1 first; a video returns the run id: poll get_run until it is terminal,
then show the human the file or post it with post_run. params: thread_id*, version |
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