/smart_money

Polymarket smart-money signals — markets with the largest net inflow from the profitable-wallet cohort, or markets that cohort bought well below the mid.

GET https://data.vike.io/v1/polymarket/smart_money

Where the wallets that have historically made money are putting it. The cohort is the set of wallets with at least $1,000 of realized P&L, at least five resolved markets and at least $5,000 of volume; the route reports what that cohort is doing, in one of two modes. It is the same answer the polymarket_smart_money MCP tool gives — the route runs that tool.

cURL

# where the profitable cohort has been putting net money over the last day: markets ranked by net_inflow, largest first
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=flows&hours=24&limit=2"

# what the cohort is buying right now: the same ranking over the last hour; 20 is the most rows the route returns
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=flows&hours=1&limit=20"

# the longest view the route allows: 720 hours, thirty days of cohort flow
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=flows&hours=720&limit=20"

# crypto markets only: the category scopes the cohort as well as the markets, and its names are exact (Crypto, Sports, Politics, Pop-Culture, Tech)
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=flows&category=Crypto&hours=24&limit=10"

# markets the cohort bought well below where they trade now, best delta first: a market needs at least $500 of cohort buying and a 0.03 gap to appear
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=mispricings&hours=24&limit=10"

# mispricings inside one category: a filter is how to keep the fast five-minute up-or-down markets, which resolve quickly and show large deltas, from filling the board
curl -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=mispricings&category=Politics&hours=72&limit=10"

# there is no as-of parameter, so a research series is a stored one: keep each hourly response with its timestamp
curl -s -H "X-API-Key: $VIKE_API_KEY" \
  "https://data.vike.io/v1/polymarket/smart_money?mode=flows&hours=1&limit=20" -o "flows-$(date -u +%Y%m%dT%H).json"

modequeryoptional

flows (default) — markets with the largest net cohort inflow in the window. mispricings — markets where the cohort bought meaningfully below the current mid. Any other value is a 400.

hoursqueryoptional

Lookback window in hours, an integer from 1 to 720. Default 24. Anything else is a 400.

categoryqueryoptional

Restrict to one market category (at most 64 characters). Default: all. An unknown category returns [], not an error.

limitqueryoptional

Maximum rows, a positive integer. Default 10; values above 20 are capped at 20.

A real response for mode=flows.

Example response (mode=flows)

[
  {
    "condition_id": "0xe0b5bd8eef80fe8976e2c287e0b76a5cda138ddc437acf95f9ba91112dbc983d",
    "title": "Seahawks vs. Broncos",
    "slug": "nfl-sea-den-2026-10-16",
    "smart_wallets": 227,
    "buy_inflow": 3819464.49,
    "sell_outflow": 166081.01,
    "net_inflow": 3653383.48,
    "trades": 4576,
    "last_ts": "2026-10-16 03:49:49",
    "yes_mid": 0.015
  }
]

And a real response for mode=mispricings.

Example response (mode=mispricings)

[
  {
    "condition_id": "0x6a93a3190840da7ad3545168388c83c2244c4b5279bbe8ef537f1a091bcec7a0",
    "title": "Solana Up or Down - October 15, 10:50AM-10:55AM ET",
    "slug": "sol-updown-5m-1792075800",
    "smart_wallets": 49,
    "last_buy_ts": "2026-10-15 14:55:16",
    "total_buy_value": 1548.59,
    "side": "YES",
    "avg_buy_price": 0.2466,
    "current_mid": 0.985,
    "delta": 0.7384,
    "buy_value": 384.66
  }
]

Reading it

net_inflow is dollars, not shares: cohort buys minus cohort sells in the window.
yes_mid can be null — the market has no recorded mid yet. It is absent data, not zero.
mispricings only lists clear cases. A market appears when the cohort put at least $500 into it and the current mid is at least 0.03 away from their average entry in their favour. delta is current_mid - avg_buy_price for the side they bought; a large positive value means the market has already moved toward the cohort. It records where they were early and is not a forecast.
side is the outcome position, not a literal Yes/No. YES is the first outcome of the market and NO the second, so on an Over/Under or a two-team market read them as "outcome 1" and "outcome 2" and take the names from the market.
category names are exact. The categories are Crypto, Sports, Politics, Pop-Culture and Tech; omit the parameter for all markets. The cohort is built per category, and any other spelling matches no cohort, so it returns [] rather than an error.
Rows are ordered best first: flows by net_inflow descending, mispricings by delta descending, then by total_buy_value.
A short-dated market can dominate. Five-minute "up or down" markets resolve fast and show large deltas; filter with category when you want slower markets.

Errors

Status	When
`400`	`mode`, `hours` or `limit` is outside the values above, `category` is too long, or an unknown query parameter is sent. The body is `{"error": "…"}`.
`401` / `429`	No or bad credential, or the hourly budget is spent — see Authentication and Rate limits.
`503`	The store behind it is unavailable. The body carries no driver text.