Neg-Risk Child Markets

Every child market inside a Polymarket neg-risk event — one row per candidate with its own condition_id, question, slug, active/closed state, and volume.

Drill into a single neg-risk event to get every child market (one per candidate) with its own condition_id, question (formatted "Will {candidate} win?"), slug, active/closed state, and lifetime volume.

Backed by v2.neg_risk_child. Sorted by volume_all_time DESC so the most-traded outcomes surface first.

Request

GET /clobv2/neg-risk/events/{parent_id}/children

Authentication

Paid tier required. See /clobv2/trades for auth formats.

Path parameters

Parameter	Type	Required	Description
parent_id	string	Yes	The neg-risk event’s id (32-byte, 0x + 64 hex). Get one from /clobv2/neg-risk/events.

Query parameters

Parameter	Type	Required	Description
limit	integer	No	Max children returned (1-1000, default 200).

Parameter validation

• parent_id: regex ^0x[a-f0-9]{64}$.
• limit: 1-1000.

Bad input → 400 Bad Request.

Response

{
  "parent_id": "0x3124c2b2cc076379db07e928b48a4c8c82b4508bc6b87730c7e664a4b711e300",
  "source": "onchain-v2",
  "count": 3,
  "children": [
    {
      "parent_id": "0x3124c2b2cc076379db07e928b48a4c8c82b4508bc6b87730c7e664a4b711e300",
      "child_condition_id": "0x4a81b2661bc43539adc883981071bc54dbb4bb69e3456c4e76365b9a56d907dc",
      "outcome_title": "Cameron Young",
      "question": "Will Cameron Young win the 2025 Wyndham Championship?",
      "slug": "will-cameron-young-win-the-2025-wyndham-championship",
      "event_title": "PGA TOUR Wyndham Championship – Winner",
      "event_slug": "pga-tour-wyndham-championship-winner",
      "active": true,
      "closed": true,
      "end_date": "2025-08-04T00:00:00+00:00",
      "volume_all_time": "183122.12766699999338015913963",
      "image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/fedex-cup-winner-uXTWFOWO-0w7.png"
    }
  ]
}

Response fields

Field	Type	Description
parent_id	string	Echoes the path parameter.
source	string	Always "onchain-v2".
count	integer	Number of children returned.
children[].parent_id	string	Same as top-level parent_id.
children[].child_condition_id	string	32-byte condition_id for this child market. Use with /clobv2/trades?condition_id=... to pull fills.
children[].outcome_title	string	Candidate name (e.g. "Cameron Young", "Donald Trump").
children[].question	string	Full question string ("Will {candidate} win ...").
children[].slug	string	Polymarket URL slug for the child market.
children[].event_title	string	Same for every child — the parent event’s title.
children[].event_slug	string	Same for every child — the parent event’s slug.
children[].active	boolean	Market was enabled on Polymarket.
children[].closed	boolean	Market has been resolved (event concluded).
children[].end_date	string | null	ISO-8601 UTC resolution date.
children[].volume_all_time	string (numeric)	Cumulative USDC volume across v1 + v2 for this child (from the metadata layer).
children[].image	string | null	CDN URL of the event image (shared across all children).

Rate-limit headers

Standard: x-ratelimit-limit, x-ratelimit-remaining, x-ratelimit-reset.

Examples

cURL

# All 147 children of the PGA Wyndham winner event
curl "https://api.polynode.dev/clobv2/neg-risk/events/0x3124c2b2cc076379db07e928b48a4c8c82b4508bc6b87730c7e664a4b711e300/children?limit=500" \
  -H "x-api-key: pn_live_..."

Error responses

Status	Body	When
400	{"error": "invalid condition_id ..."}	parent_id isn’t 0x + 64 hex.
401	{"error": "missing API key ..."}	No key or bad key.
402	{"error": "paid plan required ..."}	Free tier.
429	{"error": "rate limit exceeded", "reset_at": <unix>}	Rate limit hit.
5xx	{"error": "upstream gateway error"}	Transient upstream; retried once.

Notes

• An unknown parent_id returns count: 0 with children: [] — not a 404.
• volume_all_time is cumulative across v1 + v2 because a single condition_id can exist in both exchanges. Use /clobv2/markets/{token_id}/volume if you specifically want the v2-only subset for one outcome token.
• The same event’s children all share image, event_title, event_slug, and end_date. These are denormalized for convenience.
• active and closed both being true is expected for a resolved event — closed means resolution happened, active means Polymarket enabled the market (and never disabled).
• Sorted by volume_all_time DESC NULLS LAST.