Poseidon

Connect Remote server

claude mcp add --transport http poseidon https://api.askposeidon.app/mcp --header "Authorization: Bearer <YOUR_API_KEY>"

{
  "mcpServers": {
    "poseidon": {
      "url": "https://api.askposeidon.app/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "poseidon": {
      "type": "http",
      "url": "https://api.askposeidon.app/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://api.askposeidon.app/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 14 found in our last check

• search_winners

  Find winning e-commerce ads (Facebook / Instagram, Meta Ad Library) and show what's working. Use it FIRST when the user asks for winning ads, what's working or scaling in a niche or a country, the best hooks, the longest-running ads, or ads that reach a given age and gender. Exa…

• get_ad

  One ad in full, by its Meta Ad Library id. Use it to read an ad's whole script, see how it is built, or check one ad the user names ('show me the script of ad 862034243491035', 'break down this ad'). Returns the verbatim script sentence by sentence, each labelled Hook, Problem,…

• find_brand

  Find a competitor by name or shop domain, before get_brand or brand_changes. Use it whenever the user names a brand or store ('show me Epycure's ads', 'what is Leaf running', 'gymshark.com'). Fuzzy: returns up to 10 confirmed e-commerce brands, best first, each with what matched…

• brand_changes

  Watch a competitor: what changed for one brand since a date. Use it for 'what's new from <brand>', 'did they launch or stop ads', 'what is scaling for them this week'. Returns, each with its date and source: ads started (Meta's start date), ads stopped (Meta's stop date), ads wh…

• watchlist_edit

  Save competitors to watch, on your key: add or remove brands by page_id (get it with find_brand), up to 25. Use it when the user says 'watch these brands', 'add X to my competitors', 'stop watching Y'. Only confirmed e-commerce brands can be added. Returns the watchlist. Free.

• get_facts

  Weighted facts about what wins, each with its sample and its odds: e.g. 'in weight loss, EU, same brand and same launch day, video reached more people than image in 28 of 40 brands (70%, 95% interval 55-82%, p = 0.017)'. Use it when the user asks what is proven, what works bette…

• watchlist_webhook

  Get pushes instead of polling: set an https URL on your key and Poseidon POSTs the new changes of your watched brands (new ads, stopped ads, more versions, reused media, reach growth) about every hour, signed with HMAC-SHA256 (header Poseidon-Signature: t=…,v1=…; the secret is r…

• watchlist

  The brands saved on your key's watchlist (page_id, name, shop, date added). Free.

• watchlist_changes

  What changed across ALL your watched competitors since a date, in one call. Use it for 'what's new from my competitors', 'weekly competitor report'. Same content, dates and sources as brand_changes, grouped by brand; brands with no change are listed apart. Also says how many wat…

• get_brand

  What one brand or shop is running on Meta. Use it when the user names a store or brand ('what is epycure.com running', 'how long do Leaf Co's ads last'). Give the shop domain (e.g. epycure.com) or the Meta page id. Returns the shop (link, platform), the brand's ads in Poseidon b…

• search_experiments

  Brands' own A/B tests and which version won. Use it when the user asks what brands tested, which video, text or hook won, or for 'A/B test' or 'split test' results ('did shapewear brands in France test different videos with the same text, and which won?'). A test = ads of one br…

• get_weights

  Medians and statistics across many ads (not single ads): the median days live, median EU reach or median versions of a format, niche, country or target, with the sample size. Use it FIRST for any question about a median, an average, a typical value or a comparison of formats: 'm…

• filters

  Free. The values Poseidon accepts, with live counts: niches, Meta formats, countries with reach data, age bands, sort orders, the winner rule and the coverage. Call it when unsure of a niche name or a country code, or when the user asks what Poseidon covers.

• account

  Free. Credits left (they never expire), prices per call, the last calls and credit movements. Use it when the user asks about credits, balance, usage or cost.

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