curl --request POST \
--url https://core-api.adipredictstreet.com/api/orders/place \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--data '
{
"marketId": "NC26-BIN-83479265",
"price": "0.42",
"quantity": "2",
"nonce": "<string>",
"expiry": 0,
"maker": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
"signature": "<string>",
"clientOrderId": "<string>",
"type": "limit",
"postOnly": false
}
'import requests
url = "https://core-api.adipredictstreet.com/api/orders/place"
payload = {
"marketId": "NC26-BIN-83479265",
"price": "0.42",
"quantity": "2",
"nonce": "<string>",
"expiry": 0,
"maker": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
"signature": "<string>",
"clientOrderId": "<string>",
"type": "limit",
"postOnly": False
}
headers = {
"X-Api-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
marketId: 'NC26-BIN-83479265',
price: '0.42',
quantity: '2',
nonce: '<string>',
expiry: 0,
maker: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3',
signature: '<string>',
clientOrderId: '<string>',
type: 'limit',
postOnly: false
})
};
fetch('https://core-api.adipredictstreet.com/api/orders/place', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://core-api.adipredictstreet.com/api/orders/place",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'marketId' => 'NC26-BIN-83479265',
'price' => '0.42',
'quantity' => '2',
'nonce' => '<string>',
'expiry' => 0,
'maker' => '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3',
'signature' => '<string>',
'clientOrderId' => '<string>',
'type' => 'limit',
'postOnly' => false
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://core-api.adipredictstreet.com/api/orders/place"
payload := strings.NewReader("{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://core-api.adipredictstreet.com/api/orders/place")
.header("X-Api-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://core-api.adipredictstreet.com/api/orders/place")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}"
response = http.request(request)
puts response.read_body{
"orderId": "<string>",
"status": "PENDING",
"filledQty": "<string>",
"remainingQty": "<string>",
"trades": [
{
"id": "<string>",
"orderId": "<string>",
"userWallet": "<string>",
"marketId": "<string>",
"price": "<string>",
"quantity": "<string>",
"fee": "<string>",
"side": "buy",
"createdAt": "<string>"
}
],
"code": "<string>",
"message": "<string>",
"clientOrderId": "<string>"
}{
"error": {
"code": "bad_request",
"message": "<string>",
"details": {},
"trace_id": "<string>"
},
"status": 400
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"error": {
"code": "bad_request",
"message": "<string>",
"details": {},
"trace_id": "<string>"
},
"status": 400
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}Place a signed order
Submits an EIP-712-signed order to the matching engine. Strict balance lock runs inside a single PG transaction before the matcher is called. The signer (your key’s associatedWallet) must equal the EIP-712 signer — impersonation is refused. Rate limited at 20 req/s per wallet. Sign the EIP-712 struct with Order.expiration = 0 to avoid MatchFailed(OrderExpired) (selector 0xc56873ba) on on-chain settlement — settlement is asynchronous, and a tight TTL races the submitter.
curl --request POST \
--url https://core-api.adipredictstreet.com/api/orders/place \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--data '
{
"marketId": "NC26-BIN-83479265",
"price": "0.42",
"quantity": "2",
"nonce": "<string>",
"expiry": 0,
"maker": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
"signature": "<string>",
"clientOrderId": "<string>",
"type": "limit",
"postOnly": false
}
'import requests
url = "https://core-api.adipredictstreet.com/api/orders/place"
payload = {
"marketId": "NC26-BIN-83479265",
"price": "0.42",
"quantity": "2",
"nonce": "<string>",
"expiry": 0,
"maker": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
"signature": "<string>",
"clientOrderId": "<string>",
"type": "limit",
"postOnly": False
}
headers = {
"X-Api-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
marketId: 'NC26-BIN-83479265',
price: '0.42',
quantity: '2',
nonce: '<string>',
expiry: 0,
maker: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3',
signature: '<string>',
clientOrderId: '<string>',
type: 'limit',
postOnly: false
})
};
fetch('https://core-api.adipredictstreet.com/api/orders/place', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://core-api.adipredictstreet.com/api/orders/place",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'marketId' => 'NC26-BIN-83479265',
'price' => '0.42',
'quantity' => '2',
'nonce' => '<string>',
'expiry' => 0,
'maker' => '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3',
'signature' => '<string>',
'clientOrderId' => '<string>',
'type' => 'limit',
'postOnly' => false
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://core-api.adipredictstreet.com/api/orders/place"
payload := strings.NewReader("{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://core-api.adipredictstreet.com/api/orders/place")
.header("X-Api-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://core-api.adipredictstreet.com/api/orders/place")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"marketId\": \"NC26-BIN-83479265\",\n \"price\": \"0.42\",\n \"quantity\": \"2\",\n \"nonce\": \"<string>\",\n \"expiry\": 0,\n \"maker\": \"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3\",\n \"signature\": \"<string>\",\n \"clientOrderId\": \"<string>\",\n \"type\": \"limit\",\n \"postOnly\": false\n}"
response = http.request(request)
puts response.read_body{
"orderId": "<string>",
"status": "PENDING",
"filledQty": "<string>",
"remainingQty": "<string>",
"trades": [
{
"id": "<string>",
"orderId": "<string>",
"userWallet": "<string>",
"marketId": "<string>",
"price": "<string>",
"quantity": "<string>",
"fee": "<string>",
"side": "buy",
"createdAt": "<string>"
}
],
"code": "<string>",
"message": "<string>",
"clientOrderId": "<string>"
}{
"error": {
"code": "bad_request",
"message": "<string>",
"details": {},
"trace_id": "<string>"
},
"status": 400
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"error": {
"code": "bad_request",
"message": "<string>",
"details": {},
"trace_id": "<string>"
},
"status": 400
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}{
"code": "<string>",
"message": "<string>",
"details": {}
}Authorizations
Partner / integrator key — format ps_live_<keyId>_<secret>. Issued by PredictStreet ops on request; never self-service. Never ship to a browser. multi_wallet partners must additionally send X-User-Wallet: 0x<40-hex> on every authenticated request to declare the acting wallet. See the API keys guide for scope taxonomy, partner kinds, rate limits, and rotation procedure.
Headers
Required for multi_wallet partners on every authenticated request; ignored for single_wallet. Declares the acting end-user wallet for this request — drives KYC checks, balances/positions/orders attribution, rate-limit buckets, and audit. Lower-cased server-side. Missing on a multi_wallet key → 401 api_key_user_wallet_required; malformed → 401 api_key_user_wallet_invalid. The on-chain CTFExchange/Vault contracts still verify EIP-712 signer ↔ vault binding, so loosening API-layer attribution is safe by construction.
^0x[a-fA-F0-9]{40}$"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3"
Body
App-level market symbol. The platform resolves the on-chain tokenId for the chosen outcome automatically.
"NC26-BIN-83479265"
buy, sell 0 = first outcome (YES for binary), 1 = second outcome (NO for binary). Index into market.outcomes[] for N-ary.
0, 1 Decimal USDC price per outcome token. Strictly between 0 and 1, max 6 decimals.
"0.42"
Decimal outcome-token quantity. Strictly > 0, max 6 decimals.
"2"
Decimal-string of the salt field used in the signed EIP-712 Order struct (uint256).
Unix-seconds = Order.expiration in the signed struct. Recommended 0 (no on-chain expiry); a tight TTL races async settlement and surfaces as MatchFailed(OrderExpired) (selector 0xc56873ba).
x >= 00
Vault address (= VaultFactory.vaultOf(signer)). Must equal Order.maker in the signed struct. The backend recomputes vaultOf(signer) and rejects mismatches with 400 bad_signature.
^0x[a-fA-F0-9]{40}$"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3"
EIP-712 signature over the full on-chain CTFExchange Order struct (11 fields). verifyingContract = the binary CTFExchange or neg-risk PredictStreetNegRiskCtfExchange for the market.
^0x[a-fA-F0-9]+$Idempotency key scoped per associatedWallet. A retry with the same (wallet, clientOrderId) returns the original response.
128Order type. limit rests in the book at price (or matches incoming counterparties at price-or-better). market consumes the best resting prices up to price as a slippage cap. market requires timeInForce ∈ {ioc, fok} — market + gtc is rejected with code: invalid_tif because a MARKET order cannot rest.
limit, market Time-in-force. gtc (Good-Till-Cancelled) — default for limit; rests until filled, expired, or cancelled. ioc (Immediate-Or-Cancel) — match what is available at price-or-better, cancel any unfilled remainder immediately; partial fills are allowed. fok (Fill-Or-Kill) — fully fill or cancel without any partial fill. Default for market is ioc; sending market + gtc returns 400 with code: invalid_tif.
gtc, ioc, fok Post-only: the order must only rest on the book and never match on entry (maker-side guarantee). Only valid for LIMIT orders with GTC time-in-force (optionally with expiry); combining postOnly with a MARKET type or an IOC/FOK time-in-force is rejected with HTTP 400 and code post_only_invalid_order_type. A post-only order whose price meets or crosses the opposite side of the book (at-touch equality included) is rejected with { "status": "REJECTED", "code": "post_only_would_cross" } instead of executing — reprice inside the spread and resubmit. Omitted ⇒ false (unchanged behavior).
Response
Server-side order id (UUID). Empty string when status=REJECTED.
Lifecycle state at the moment of response. Note: a 200 response may carry status=REJECTED together with a populated code / message — partner SDKs MUST inspect the body, not just the HTTP code (audit M5).
PENDING, OPEN, FILLED, CANCELLED, REJECTED, EXPIRED, SETTLEMENT_FAILED Cumulative quantity filled at response time (decimal string).
quantity - filledQty (decimal string).
Synchronous fills produced by IOC/FOK or aggressive LIMIT orders.
Show child attributes
Show child attributes
Reject reason code (insufficient_balance, invalid_amounts, market_not_open, bad_signature, order_signed_with_floor_notional, position_limit_breached, …). Present when status=REJECTED. For order_signed_with_floor_notional the response body also carries a details object with signedMakerAmountWei + expectedCeilMakerAmountWei so the SDK can re-sign without recomputing the CEIL formula — see /errors/codes#order_signed_with_floor_notional-diagnostic-hints.
Human-readable explanation; pairs with code.
Echo of the request clientOrderId (when supplied). Lets MM partners correlate the server-issued orderId to their own client-side handle without a follow-up GET /api/orders/{id}. Present on every shape (success, REJECTED, idempotent replay) when the request carried one. Also echoed on the events.order_placed and events.order_cancelled WS frames.