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POST
/
v1
/
clob
/
order
Clob Order
curl --request POST \
  --url https://api.polysimulator.com/v1/clob/order \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "token_id": "<string>",
  "price": "<string>",
  "quantity": "<string>",
  "order_type": "GTC",
  "fee_rate_bps": 1,
  "nonce": "<string>",
  "taker": "<string>",
  "client_order_id": "<string>",
  "expiration": "<string>",
  "post_only": false
}
'
{
  "orderID": "<string>",
  "status": "<string>",
  "price": "<string>",
  "size": "<string>",
  "side": "<string>",
  "success": true,
  "transactID": "<string>",
  "errorMsg": "<string>",
  "takingAmount": "<string>",
  "makingAmount": "<string>"
}

Authorizations

​
X-API-Key
string
header
required

Issue from /v1/keys (or admin-issued for enterprise tier).

Headers

​
X-API-Key
string | null

Your PolySimulator API key

​
POLY_API_KEY
string | null

Polymarket-CLOB-compat alias for X-API-Key (underscore form). SDK clients ported from Polymarket can authenticate without changing header names. X-API-Key takes precedence when both are provided.

​
Poly-API-Key
string | null

PM-CLOB-compat dashed-form alias for X-API-Key. Same value semantics as POLY_API_KEY but with HTTP-conventional dash separators. Audit P1 (staging audit 2026-05-16 0817 PR #1296): the per-tier middleware accepts both spellings but the auth dependency originally only matched the underscore form — now both work end-to-end.

​
authorization
string | null

PM-CLOB-compat: Authorization: Bearer ps_live_... (or ps_test_...) is accepted as an alias for X-API-Key so py-clob-client and other ported SDKs authenticate without header name changes. Bearer JWTs are NOT accepted here — use the dashboard-auth endpoints for those.

Body

application/json

CLOB-compatible order request using token_id instead of condition_id.

Mirrors the real Polymarket CLOB API POST /order schema so clients can switch to live trading with a single URL change.

​
token_id
string
required

CLOB token ID

​
side
enum<string>
required
Available options:
BUY,
SELL
​
price
string
required

Limit price as decimal string (0.01-1.00)

​
quantity
string
required

Number of shares as decimal string

​
order_type
enum<string>
default:GTC
Available options:
GTC,
FOK,
IOC,
GTD
​
fee_rate_bps
integer | null

Fee rate in basis points (ignored in virtual mode)

Required range: x >= 0
​
nonce
string | null

Optional nonce (ignored in virtual mode)

​
taker
string | null

Optional taker address (ignored in virtual mode)

​
client_order_id
string | null
Maximum string length: 256
​
expiration
string | null

Unix-seconds expiration for order_type=GTD (PM convention). Honored while ORDER_SEMANTICS_PM_V2_ENABLED is rolling out; otherwise advisory (GTD routes through GTC).

​
post_only
boolean | null
default:false

PM's postOnly: reject (don't execute) when marketable at placement; GTC/GTD only. Rolling out behind ORDER_SEMANTICS_PM_V2_ENABLED; advisory until then.

Response

Successful Response

Response matching Polymarket CLOB order response shape.

​
orderID
string
required
​
status
string
required
​
price
string
required
​
size
string
required
​
side
string
required
​
success
boolean
default:true
​
transactID
string | null
​
errorMsg
string | null
​
takingAmount
string | null
​
makingAmount
string | null