ViralHunt API v1

Authentication

All endpoints (except this docs page) require an API key. Keys are aMember SoftSale license keys assigned to your user account.

Sending Your Key

Recommended: Use the Authorization header:

Authorization: Bearer YOUR_API_KEY

Alternative: Query parameter (less secure, useful for quick tests):

GET /api/v1/trending.php?source=rss&api_key=YOUR_API_KEY

Getting a Key

Contact your admin to generate a SoftSale license key in the aMember admin panel. The key is tied to your user account and inherits your organization membership.

Rate Limits

API requests are limited to 100 requests per hour per API key (fixed window).

Every response includes rate limit headers:

When exceeded, the API returns 429 Too Many Requests.

Error Codes

Errors return a JSON envelope:

{
  "success": false,
  "error": {
    "code": "auth_required",
    "message": "API key required."
  }
}

Trending Posts

Query trending and viral posts across platforms.

Sort Options by Source

Growth (growth_24h)

Every post can carry growth_24h: how much it moved between our two most distant readings, {from, to, delta, percent, hours, measured_at, samples}. Read it by these rules:

• null means we cannot say (one reading only, or a network with no snapshots: Facebook, Pinterest, Tumblr). Never render it as 0%.
• delta: 0 with samples ≥ 2 means measured and unchanged. Flat, not missing.
• hours is the real window. The comparison point is the newest reading at least 20 hours older than the latest; when none is that old yet, the oldest reading is used and hours says how short the window is. Quote it, never assume 24. full_window is true only when the window reached 20 hours; say "in 24h" only then. Posts under a day old (most of RSS trending) are read at about 1h, 2h, 5h, 11h and 23h after discovery, so short windows there are normal.
• percent is null when from is under 100 (from zero or from a handful of interactions a percentage is noise). delta always holds the absolute change.

Example

curl -H "Authorization: Bearer YOUR_KEY" \
  "https://viralhunt.io/tool/api/v1/trending.php?source=rss&sort=trending&time_range=7d&per_page=5"

{
  "success": true,
  "data": {
    "posts": [
      {
        "id": 123,
        "title": "Why AI is changing everything",
        "url": "https://example.com/article",
        "image_url": "https://example.com/img.jpg",
        "facebook_shares": 1200,
        "reddit_score": 500,
        "pinterest_shares": 300,
        "total_engagement": 2000,
        "trend_score": 85.0,
        "growth_rate": 25.5,
        "feed_name": "TechCrunch",
        "category_id": 3,
        "category_name": "Technology"
      }
    ]
  },
  "meta": {
    "page": 1,
    "per_page": 5,
    "total": 142,
    "total_pages": 29,
    "has_more": true
  }
}

meta.total stops counting at 10,000 and reports 10001 beyond it: a page needs to know whether there is more, not how many million matched. has_more is always exact.

Search Every Network

One keyword, every network, one answer. Each network returns its own top rows for the keyword; they come back normalized to one shape, merged and ranked, with a per-network total that shows where the topic lives. Use it for the research pass on a brand or a niche; use /trending when you want one network with its full sort options and paging.

Response

Every row has the same fields whatever the network: platform, id, title, description, post_url, thumbnail_url, author_name, author_handle, engagement_score, stats (the network's own counts), growth_24h, created_at, and the network's full row under raw. sources[] reports, per network, how many posts matched (total), how many were returned and how long it took.

{
  "success": true,
  "data": {
    "keyword": "montessori playroom",
    "posts": [
      {
        "platform": "pinterest",
        "id": "1234567890",
        "title": "calming corner: cozy ideas for montessori room",
        "post_url": "https://www.pinterest.com/pin/1234567890/",
        "thumbnail_url": "https://i.pinimg.com/....jpg",
        "author_name": "Rachel",
        "author_handle": "confidentlymom1",
        "engagement_score": 17858.5,
        "stats": {"aggregated_saves": 3899, "total_reaction_count": 197, "repin_count": 6832, "comment_count": 0},
        "growth_24h": null,
        "created_at": "2024-06-28 11:43:47",
        "rank": 1,
        "raw": { "...the row /trending returns..." }
      }
    ],
    "sources": [
      {"source": "pinterest", "total": 220, "returned": 10, "ms": 41},
      {"source": "x", "total": 0, "returned": 0, "ms": 12}
    ]
  },
  "meta": {"total": 10, "time_range": "30d", "per_source": 10, "sort": "engagement"}
}

A network with total: 0 has nothing on the keyword in that window: the corpus, not the request. Searches are logged and drive what we extract next.

Best Time to Post

When the posts that went viral on a network were published, measured on the posts of the last 365 days that carry their own publish time. Same engine as viralhunt.io/best-time-to-post. Every response says how many posts it rests on; read confidence before quoting an hour.

Response

{
  "success": true,
  "data": {
    "network": "instagram", "timezone": "Europe/Madrid", "utc_offset_hours": 2,
    "confidence": "high",
    "sample": { "posts": 18432, "window": "365d", "from": "2025-09-08", "to": "2026-09-07", "min_posts_per_slot": 37, "top10_threshold": 41200 },
    "best_slots": [
      { "weekday": 4, "weekday_name": "Thursday", "hour": 20, "weekday_utc": 4, "hour_utc": 18,
        "posts": 112, "avg_engagement": 96410, "hit_rate_pct": 19.6 }
    ],
    "worst_slot": { "...": "same shape" },
    "today": { "weekday_name": "Tuesday", "best_hours": [ { "hour": 21, "posts": 88, "avg_engagement": 71020 } ] },
    "by_hour": [ { "hour": 0, "hour_utc": 22, "posts": 640, "avg_engagement": 30110 } ],
    "by_weekday": [ { "weekday_utc": 4, "weekday_name_utc": "Thursday", "posts": 2610, "avg_engagement": 48900 } ],
    "proof_posts": [ { "engagement": 2140000, "date": "2026-06-12", "caption": "…", "url": "https://…", "handle": "…" } ],
    "how_to_read": "…",
    "page_url": "https://viralhunt.io/best-time-to-post/instagram"
  }
}

hit_rate_pct is the share of a slot's posts that reached the network's top 10%. An average can be carried by one giant post; a hit rate cannot. A slot is only named with a real sample (min_posts_per_slot).

Top Hashtags

Hashtags extracted from the captions of every post we hold, rolled up per network. Totals are over the whole corpus (window.type = "all_time", with updated_at); there is no per-day hashtag history.

{
  "success": true,
  "data": {
    "hashtags": [
      { "hashtag": "fyp", "network": "tiktok", "posts": 14210, "total_engagement": 912400000, "per_post": 64207,
        "page_url": "https://viralhunt.io/hashtag/fyp" }
    ],
    "network": "tiktok", "query": null, "sort": "engagement", "min_posts": 3,
    "window": { "type": "all_time", "updated_at": "2026-09-08 03:10:12", "note": "…" }
  },
  "meta": { "page": 1, "per_page": 20, "total": 38120, "total_pages": 1906, "has_more": true }
}

Trending Sounds

Audio trending on TikTok, Instagram Reels and Douyin, ranked by the engagement of the posts that used it, cross-network sounds first. A sound is listed only when several different accounts used it: audio used by one account is that account's voiceover, whatever language names it. Same engine as viralhunt.io/sounds.

{
  "success": true,
  "data": {
    "sounds": [
      { "slug": "espresso", "title": "Espresso", "artist": "Sabrina Carpenter",
        "networks": { "tiktok": { "posts": 212, "creators": 180, "eng": 48100000, "per_post": 226886 },
                      "instagram": { "posts": 9, "creators": 7, "eng": 1210000, "per_post": 134444 } },
        "cross": true, "stronger": "tiktok",
        "sample": { "posts": 221, "creators": 187 }, "total_engagement": 49310000,
        "page_url": "https://viralhunt.io/sounds/espresso" }
    ],
    "window": { "type": "all_time", "note": "…" }
  },
  "meta": { "page": 1, "per_page": 20, "total": 150, "total_pages": 8, "has_more": true }
}

Best Communities

Where to post a topic, from our own measurements: subreddits (network=reddit) and Bluesky custom feeds (network=bluesky). Same engines as reddit/communities and bluesky/feeds.

{
  "success": true,
  "data": {
    "communities": [
      { "subreddit": "running", "slug": "running", "members": 3900000, "peak_per_1k": 14,
        "peak_score": 54800, "peak_comments": 2100,
        "sample": { "posts": 412 }, "window": { "from": "2019-03-02", "to": "2026-09-05" },
        "url": "https://www.reddit.com/r/running/", "page_url": "https://viralhunt.io/reddit/communities/running" }
    ],
    "network": "reddit", "sort": "upside",
    "gates": { "min_posts_held": 25, "min_members": 5000, "min_peak_score": 100, "adult_excluded": true },
    "how_to_read": "…"
  },
  "meta": { "page": 1, "per_page": 20, "total": 5987, "total_pages": 300, "has_more": true }
}

peak_per_1k is the best score we hold divided by members in thousands: upside relative to size. No average score is published, because for a swept community our sample is its greatest hits and an average of those is comparable to nothing.

Create Card

Create a new card on the Editorial Board.

Auto-extraction: If title is omitted but post_url is provided, the API will fetch the URL and extract the title, description, image, and platform automatically from Open Graph / meta tags. If extraction fails, a 422 error is returned asking for a manual title.

Example: With Title

curl -X POST -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"title":"Review viral TikTok video","priority":"high","post_url":"https://tiktok.com/...","platform":"tiktok"}' \
  https://viralhunt.io/tool/api/v1/cards.php

{
  "success": true,
  "data": {
    "card_id": 42,
    "title": "Review viral TikTok video",
    "status": "pending",
    "board_column_id": 1,
    "position": 5
  }
}

Example: URL Only (Auto-Extract)

curl -X POST -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"post_url":"https://techcrunch.com/2026/02/19/some-article/","assigned_to_user_id":7,"priority":"high"}' \
  https://viralhunt.io/tool/api/v1/cards.php

{
  "success": true,
  "data": {
    "card_id": 43,
    "title": "Some Article Title Extracted From Page",
    "status": "pending",
    "board_column_id": 1,
    "position": 6,
    "auto_extracted": true,
    "description": "Description extracted from og:description...",
    "image_url": "https://techcrunch.com/img/hero.jpg",
    "platform": "web"
  }
}

Move a card

Same endpoint, action: "move". Any member of the organization may move a card. Moving into the column flagged is_done completes the card (sets status: completed and completed_at); a comment saying "done" does not.

curl -X POST -H "Authorization: Bearer YOUR_KEY" -H "Content-Type: application/json" \
  -d '{"action":"move","card_id":42,"board_column_id":3,"position":0}' \
  "https://viralhunt.io/tool/api/v1/cards.php"

Schedule / Publish to Social Networks

Publish or schedule a post — text plus media (e.g. a video) — to a project's connected social accounts. Fans out to one post per target, like the in-app composer. Requires the org to have connected accounts (Agency plans).

GET /api/v1/schedule.php?action=targets

Discover where you can post. Optional: &project=NAME or &project_id=ID (defaults to the org's first project). Returns projects[] — EVERY project in the org, each with {id, name, timezone, networks[], account_count} so you can pick which project + networks — plus project (the resolved one) and accounts[] (its postable accounts: account_id, network, name).

POST /api/v1/schedule.php?action=upload

Upload one media file (multipart field file; mp4/mov/jpg/png/gif/webp, up to 50 MB through the API) → { "url", "type" }. Use that url in media. Skip if your media is already a public URL; a bigger video must already live at a public https URL. Check media_limits on targets before sending a big video: an image over a network's ceiling is re-encoded to fit, a video over its size or length is refused for that network only, with the numbers.

POST /api/v1/schedule.php

Publish now or schedule. JSON body:

{
  "project": "Viral Hunt",                 // or "project_id": N; omit = first project
  "body": "your caption",
  "media": ["https://.../video.mp4"],      // omit for text-only
  "target_account_ids": [12, 15],          // omit = ALL connected accounts in the project
  "scheduled_at": "2026-08-01T15:30:00Z",  // ISO-8601 UTC; omit = publish now
  "first_comment": "optional first comment",
  "draft": true,                           // save in Drafts, not sent, until a person approves
  "overrides": {"bluesky": {"body": "…300 chars…", "thread": [{"body": "part 2"}]}, "12": {"media": ["…"], "first_comment": "…"}},  // per network or per account_id: body, media, first_comment, thread
  "card_id": 123,                          // the board card it comes from
  "design": {"template": "studio-news-frame", "format": "feed", "variables": {"text": "…", "image": "https://…"}}  // the picture as a filled template; the app renders it on approval (draft only)
}

Returns { id, status, targets, results, warnings }. Check status later with GET /api/v1/schedule.php?action=get&id=ID (its answer also carries events[], the delivery log of the post, and support_text, the text to paste into a support message). With draft: true (or when the organization's review mode is "all") it returns status: "draft" and a review_url; nothing is sent.

Drafts and review

Why the flow. Hand publishing to several accounts a day lets the expensive mistakes through (an unverified claim, someone else's clip, the wrong language, a spammy caption), and the networks answer with lost reach, removed posts and strikes. A link in the body cuts the reach on every network, so the body names the source and the link goes in author_notes (private, read by the reviewer) or in the first comment. Every review is stored against the author with its scores and codes (review_stats), so the owner fixes habits, not posts.

The reviewer job, every ten minutes. A token of its own (API Access → Create access: a new agent "Reviewer" with the Reviewer permission group, which grades but cannot draft or approve; tick "Their OK publishes" there or on Team, and on Team turn on "an OK in Review publishes by itself") runs this round on a schedule: GET /policy.php (the content rule, read first every time), GET ?action=drafts&stage=review&all=1&needs_review=1 (the posts with no verdict on their current content), one POST ?action=review per post with verdict, scores, warnings per network and a note the author reads. The server recalculates the verdict from the scores, ignores an OK on a post the same user created (by user, not token: the reviewer is its own agent member), releases only on a trusted token's OK with the time at least 15 minutes away, drops the OK when the post is edited, and keeps a post whose scores sit outside thresholds.auto_send (risk10 > 5, fake_news < 70, image_match < 60) for a person even on a trusted OK (sent.skipped names the rule: risk_threshold). Drafts rows carry project_lang, the project's declared language: a post in another language is fix_language. The prompt that sets it up is in the agent guide inside the app and in the skill, section 5c.

Example: publish a video now

curl -X POST -H "Authorization: Bearer YOUR_KEY" \
  -F "file=@video.mp4" \
  "https://viralhunt.io/tool/api/v1/schedule.php?action=upload"
# then, with the returned url:
curl -X POST -H "Authorization: Bearer YOUR_KEY" -H "Content-Type: application/json" \
  -d '{"project":"Viral Hunt","body":"New drop","media":["URL_FROM_UPLOAD"]}' \
  https://viralhunt.io/tool/api/v1/schedule.php

Team Members

List members of your organization.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/members.php

{
  "success": true,
  "data": {
    "members": [
      {"user_id": 1, "user_name": "Jane Doe", "user_email": "jane@example.com", "role": "owner"},
      {"user_id": 5, "user_name": "John", "user_email": "john@example.com", "role": "member"}
    ]
  }
}

Organization Info

Get details about your organization.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/organization.php

{
  "success": true,
  "data": {
    "id": 1,
    "name": "My Team",
    "team_size": 5,
    "timezone": "America/New_York",
    "niche_tags": ["tech", "AI", "startups"],
    "created_at": "2024-06-15 10:00:00"
  }
}

Board Columns

List Editorial Board columns. Auto-creates defaults if none exist.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/columns.php

{
  "success": true,
  "data": {
    "columns": [
      {"id": 1, "name": "To Review", "color": "#6366f1", "position": 0, "is_default": true, "is_done": false},
      {"id": 2, "name": "In Progress", "color": "#f59e0b", "position": 1, "is_default": false, "is_done": false},
      {"id": 5, "name": "Published", "color": "#10b981", "position": 4, "is_default": false, "is_done": true}
    ]
  }
}

Board Categories

List active board categories for tagging cards.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/categories.php

{
  "success": true,
  "data": {
    "categories": [
      {"id": 1, "name": "General", "color": "#6b7280", "icon": "fa-folder"},
      {"id": 2, "name": "Urgent", "color": "#ef4444", "icon": "fa-fire"},
      {"id": 3, "name": "Ideas", "color": "#8b5cf6", "icon": "fa-lightbulb"}
    ]
  }
}

News Categories

The categories of the news corpus (source=rss), with how many feeds carry each and how many articles arrived in the last 7 and 30 days. Pass a name or id as category= on trending.php?source=rss. Not the Editorial Board categories above. Technology and Artificial Intelligence are separate: for AI content ask for both.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/news-categories.php

{
  "success": true,
  "data": {
    "categories": [
      {"id": 4, "name": "Politics", "feeds": 18, "posts_7d": 1240, "posts_30d": 5310},
      {"id": 3, "name": "Technology", "feeds": 22, "posts_7d": 410, "posts_30d": 1790},
      {"id": 15, "name": "Artificial Intelligence", "feeds": 6, "posts_7d": 120, "posts_30d": 530}
    ],
    "how_to_use": "trending.php?source=rss&category= ..."
  }
}

Workspace Context

Get combined workspace context in a single call: organization info, team members, board columns, and categories. Ideal for bot integrations that need full context before taking actions.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/context.php

{
  "success": true,
  "data": {
    "organization": {
      "id": 1,
      "name": "My Team",
      "team_size": 5,
      "timezone": "America/New_York",
      "niche_tags": ["tech", "AI", "startups"],
      "created_at": "2024-06-15 10:00:00"
    },
    "members": [
      {"user_id": 1, "user_name": "Jane Doe", "user_email": "jane@example.com", "role": "owner"},
      {"user_id": 5, "user_name": "John", "user_email": "john@example.com", "role": "member"}
    ],
    "columns": [
      {"id": 1, "name": "To Review", "color": "#6366f1", "position": 0, "is_default": true, "is_done": false},
      {"id": 5, "name": "Published", "color": "#10b981", "position": 4, "is_default": false, "is_done": true}
    ],
    "categories": [
      {"id": 1, "name": "General", "color": "#6b7280", "icon": "fa-folder"},
      {"id": 2, "name": "Urgent", "color": "#ef4444", "icon": "fa-fire"}
    ]
  }
}

Pending Cards

Get pending and in-progress cards grouped by assigned team member. Useful for bot reminders and workload overview.

curl -H "Authorization: Bearer YOUR_KEY" \
  https://viralhunt.io/tool/api/v1/pending.php

{
  "success": true,
  "data": {
    "summary": {
      "total_pending": 8,
      "total_urgent": 2,
      "total_overdue": 1,
      "total_unassigned": 1
    },
    "members": [
      {
        "user_id": 7,
        "user_name": "Alejandra Galaz",
        "total": 3,
        "urgent": 1,
        "overdue": 1,
        "cards": [
          {
            "card_id": 42,
            "title": "Review: NASA Starliner Report",
            "priority": "high",
            "status": "pending",
            "due_date": "2026-02-18",
            "is_overdue": true,
            "column_name": "To Review",
            "post_url": "https://nasa.gov/..."
          }
        ]
      }
    ],
    "unassigned": [...]
  }
}

GET /account

Who the key belongs to, the plan, and the credit balance. Call it first: it tells an agent what it may do before it tries.

Two meters. Daily quota: free accounts may make 24 content queries a day (/trending, /best-time, /hashtags, /sounds, /communities, /url-meta), counted together; the response carries X-Daily-Limit, X-Daily-Remaining and X-Daily-Reset, and the 25th answers 429 daily_limit_reached. Paid plans have no daily cap, only their hourly rate limit. Credits: aMember credits charged per successful call on endpoints that do real work (template renders, images, video, when they exist); queries never spend credits. A call that costs credits carries X-Credits-Cost and X-Credits-Balance, and answers 402 insufficient_credits when the balance is short. Free accounts also get an API key with 60 requests an hour, see trending content with a 72 hour delay and with engagement numbers withheld (metrics_hidden: true), the same as the web app; publishing needs a paid plan.

{
  "success": true,
  "data": {
    "user_id": 12, "organization_id": 7, "role": "owner",
    "plan": {"key": "free", "label": "Free", "group": "free", "requests_per_hour": 60, "can_publish": false},
    "daily_queries": {"limit": 24, "used_today": 3, "remaining": 21, "resets_at": "2026-09-15T00:00:00+00:00"},
    "credits": {"enabled": true, "balance": 50, "free_monthly_allowance": 50, "note": "Credits pay for rendering work (templates, images, video). Queries do not spend credits."},
    "endpoints": {"trending": {"credits": 0, "counts_toward_daily_quota": true}, "templates": {"credits": 0, "counts_toward_daily_quota": false}},
    "free_plan_notes": ["Trending content is served with a 72 hour delay on the free plan.", "Publishing and scheduling need a connected account, which paid plans include."]
  }
}

My Cards

The cards assigned to the member the token belongs to. When the token belongs to an agent member (created in Account → API Access), this is the agent's own workload: the loop is read this list, validate the source, comment progress, move the card to the is_done column.

{
  "success": true,
  "data": {
    "cards": [
      { "card_id": 42, "title": "…", "description": "…", "status": "pending", "priority": "high", "due_date": "2026-09-12",
        "post_url": "https://…", "image_url": "https://…", "platform": "tiktok",
        "board_column_id": 1, "column_name": "To Do", "column_color": "#6b7280",
        "category_id": 3, "category_name": "Memes", "comment_count": 2,
        "project_id": 1, "project_name": "My Brand", "created_at": "…" }
    ]
  },
  "meta": { "page": 1, "per_page": 20, "total": 3, "total_pages": 1, "has_more": false }
}

Card Comments

Any active member may read and comment on any card of the organization, like the web board. A new comment notifies the card's assignee (push, and email when they opted in) and is mirrored to Team Chat's #board channel.

curl -X POST -H "Authorization: Bearer YOUR_KEY" -H "Content-Type: application/json" \
  -d '{"card_id":42,"comment":"Source checked, drafting now."}' \
  "https://viralhunt.io/tool/api/v1/comments.php"

{ "success": true, "data": { "card_id": 42, "comments": [ { "id": 7, "user_id": 900000001, "user_name": "Radar agent", "comment_text": "…", "created_at": "…" } ] } }

Card Types

What a card is (Post, Note, Article, Video…), next to the category that says what it is about. Pass the name as card_type or the id as card_type_id when creating a card. The four defaults are seeded on first use; owners and admins add more from the board settings. Before the migration runs the list is empty and carries unmigrated: true.

{ "success": true, "data": { "types": [ { "id": 1, "name": "Post" }, { "id": 2, "name": "Note" }, { "id": 3, "name": "Article" }, { "id": 4, "name": "Video" } ] } }

What Performed

The engagement of the posts published through ViralHunt, as the networks report it back: by_network, by_project and top_posts (with permalinks). ready: false means nothing has been collected yet for this organization. The way to answer "what worked", and to look for more like the winners with /search.

{ "success": true, "data": { "ready": true, "days": 30,
    "by_network": [ { "network": "instagram", "posts": 18, "impressions": 412000, "likes": 9300, "comments": 410 } ],
    "by_project":  [ { "project_id": 1, "project": "Cerebro Digital", "posts": 42, "impressions": 980000 } ],
    "top_posts":   [ { "id": 787, "network": "facebook", "permalink": "https://facebook.com/…", "impressions": 106556, "body": "…" } ] } }

Calendar

The calendar base: international days (UN, UNESCO, WHO) and anniversaries of science, technology, space, health, the environment and civilization (Wikipedia and a verified seed), each with why: what is celebrated or what happened, and why it matters. Write the caption from it. An observance repeats every year (since_year); an event, birth or death carries year and years_ago. importance 3 = most brands can post about it, 2 = worth it inside its category, 1 = niche. image_url is a free Wikipedia thumbnail when there is one (check the article's licence before using it under a brand).

GET ?stats=1 counts the rows per category and kind. POST {"action":"mark_used","calendar_id":N,"note":"…"} records that this organization posted about it this year, so unused=1 skips it. Unknown parameters and categories are a 422.

Quotes

A quotes base for daily-quote series, ranked by our popularity score. Each quote carries text, author, author_context (description, born, died), work, categories, rights, popularity (high, medium, low) and author_image (portrait url, licence, credit, source page). Default rights=public_domain: authors dead more than 70 years, the safe set to publish under a brand; rights=any adds the rest, flagged restricted. max_chars defaults to 180, what the quote templates fit. unused=1 leaves out what this organization already used.

GET ?categories_list=1 lists the categories held with their counts. POST {"action":"mark_used","quote_id":N,"note":"…"} marks a quote used for this organization, so tomorrow's pick is a different one.

Recipes (standing orders)

What a person saved in the app as a standing order for the brand: each recipe carries source (quotes, trending, manual) with source_params and source_call (the exact request that fetches the content), the template (its slug, for /templates?slug=), format, networks, cadence (daily, weekdays, weekly, manual), post_time in the project's timezone (null = the network's best time), caption_brief, is_active and last_run_at. Nothing runs on the server: the agent does the loop (fetch, fill, render, schedule, mark the quote used) and then POST {"action":"ran","recipe_id":N,"note":"…"} so the person sees it happened.

Content Templates

On-brand layout templates (HTML + CSS + a variable manifest) that an agent fills and renders into a finished graphic. ViralHunt stores the layout; your agent renders it — see render_tech on each template.

The list omits html/css on purpose — they run several KB each. Browse the list, then fetch the one you'll render by slug.

curl -H "Authorization: Bearer YOUR_KEY" \
  "https://viralhunt.io/tool/api/v1/templates.php?slug=vh-image-card"

{
  "success": true,
  "data": {
    "template": {
      "id": 1,
      "slug": "vh-image-card",
      "name": "Viral image card",
      "scope": "global",
      "category": "image",
      "media_type": "image",
      "aspect": "4:5",
      "canvas_w": 1080,
      "canvas_h": 1350,
      "formats": [
        {"name": "feed",  "w": 1080, "h": 1350, "aspect": "4:5",  "default": true,
         "networks": ["facebook", "instagram", "threads", "bluesky"]},
        {"name": "story", "w": 1080, "h": 1920, "aspect": "9:16", "networks": ["instagram", "tiktok"]}
      ],
      "palette": {"magenta": "#ff159a", "cyan": "#1edbee", "bg": "#000000"},
      "fonts": [{"family": "Inter", "weight": 400, "url_woff2": "https://..."}],
      "variables": [
        {"key": "text", "label": "Hook", "type": "text",
         "description": "One line, faithful to the original post, punchy.",
         "rules": {"max_chars": 85, "no_em_dash": true},
         "highlightable": true, "required": true,
         "example": "Meet Kio, a lion cub with a big destiny"},
        {"key": "color", "type": "token", "rules": {"enum": ["cyan", "magenta"], "default": "cyan"}}
      ],
      "html": "<div class=\"vh-card\" data-format=\"{{format}}\">…",
      "css": "@font-face{…}",
      "render_tech": "HTML→PNG (Playwright/Puppeteer): set the viewport to the chosen format's w×h, load html+css, wait for [data-vh-ready=\"1\"], screenshot the .vh-card element."
    }
  }
}

Rendering contract: replace every {{key}} in html, honour each variable's rules as hard constraints, set the viewport to the chosen format's size, and wait for [data-vh-ready="1"] before screenshotting .vh-card — the template sets that flag once its fonts and images have loaded and the headline has auto-shrunk. Colors are palette tokens ("cyan"), never raw hex.

Author or edit a template

Templates are built by agents that already write layouts in code, so authoring is an API call. Owner/admin only. Editing a curated/global template clones it into your organization's own copy — the global is never modified. On update send only the fields that change.

curl -X POST -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
        "action": "create",
        "slug": "my-quote-card",
        "name": "My quote card",
        "category": "quote",
        "media_type": "image",
        "canvas_w": 1080, "canvas_h": 1350,
        "formats": [{"name":"feed","w":1080,"h":1350,"aspect":"4:5","default":true}],
        "html": "<div class=\"vh-card\"><p>{{quote}}</p></div>",
        "css":  ".vh-card{width:1080px;height:1350px;background:#000;color:#fff}",
        "palette": {"cyan": "#1edbee"},
        "fonts": [{"family":"Inter","weight":400,"url_woff2":"https://..."}],
        "variables": [
          {"key":"quote","label":"Quote","type":"text","required":true,
           "description":"A verified quote, max 180 chars.",
           "rules":{"max_chars":180,"no_em_dash":true}}
        ]
      }' \
  "https://viralhunt.io/tool/api/v1/templates.php"

Two rules are enforced, so design for them:

• Every {{placeholder}} in html must be declared in variables — otherwise the call is rejected with validation_error. An undeclared hole would render blank for whoever fetches the template.
• html and css are capped at 256KB each. Reference images and fonts by URL instead of inlining them.

Returns 201 with the stored template (and cloned_from when a global was cloned), 200 on a plain update.

Assign a template to a project

Controls what ?assigned=1&project_id=N returns for that project. Owner/admin only — it decides what every agent on that brand may publish with. Humans do the same from Templates in the app.

curl -X POST -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"project_id":1,"template_id":7,"action":"add"}' \
  "https://viralhunt.io/tool/api/v1/template-assignments.php"

{
  "success": true,
  "data": {
    "project":  {"id": 1, "name": "My Brand"},
    "template": {"id": 7, "slug": "vh-image-card", "name": "Viral image card"},
    "assigned": true
  }
}

Try It

Test API endpoints live from your browser.