Documentation / Races

The field

GET/v1/races/{race_id}/field

Available on Live Plus only

A Live key reaches the other 42 endpoints and receives 403 upgrade_required here. Compare plans

The whole field in one call: record here, grade record, layoff and the draw, per runner.

Authenticate with your key in the X-API-Key header, or ?key= if your tool cannot set one — see Authentication. Works with sandbox keys inside the sandbox data window.

Parameters

NameInTypeRequiredDescription
race_id path integer yes The race identifier.

Request

curl "https://api.greyhoundapi.com/v1/races/3959843903/field" \
  -H "X-API-Key: $GAPI_KEY"
<?php
$ch = curl_init('https://api.greyhoundapi.com/v1/races/3959843903/field');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER     => ['X-API-Key: ' . getenv('GAPI_KEY')],
]);
$response = json_decode(curl_exec($ch), true);
curl_close($ch);

print_r($response['data']);
const res = await fetch('https://api.greyhoundapi.com/v1/races/3959843903/field', {
  headers: { 'X-API-Key': process.env.GAPI_KEY }
});
if (!res.ok) throw new Error(`GreyhoundAPI ${res.status}`);
const { meta, data } = await res.json();
console.log(meta.data_as_of, data);
import { useEffect, useState } from 'react';

export default function Example() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('https://api.greyhoundapi.com/v1/races/3959843903/field', {
      headers: { 'X-API-Key': import.meta.env.VITE_GAPI_KEY }
    })
      .then((r) => r.json())
      .then((body) => setData(body.data));
  }, []);

  if (!data) return <p>Loading…</p>;
  return <pre>{JSON.stringify(data, null, 2)}</pre>;
}

Browser code exposes whatever key it ships with — use a sandbox key for prototypes and proxy live keys through your own server in production.

import os
import requests

r = requests.get(
    "https://api.greyhoundapi.com/v1/races/3959843903/field",
    headers={"X-API-Key": os.environ["GAPI_KEY"]},
    timeout=10,
)
r.raise_for_status()
body = r.json()
print(body["meta"]["data_as_of"], body["data"])

Response

200 OKapplication/json
{
    "meta": {
        "request_id": "req_8f2ac1",
        "data_as_of": "2026-07-08T13:05:12Z"
    },
    "data": {
        "race_id": 3566844427,
        "region": "GB",
        "track": {
            "track_id": 3423913378,
            "name": "Romford"
        },
        "distance_m": 575,
        "grade": "S2",
        "is_handicap": false,
        "scheduled_start": {
            "utc": "2026-09-15 14:19:00"
        },
        "field": {
            "runners": 5,
            "avg_first_split_s": 13.948,
            "with_split_figure": 5
        },
        "runners": [
            {
                "trap": 1,
                "dog_id": 2643190085,
                "dog_name": "Zenith Angel",
                "pace": {
                    "avg_first_split_s": 13.939,
                    "runs": 18
                },
                "here": {
                    "runs": 18,
                    "wins": 2,
                    "places": 10,
                    "win_pct": 11.1,
                    "scope": "this track and distance"
                },
                "from_this_trap": {
                    "track_trap_win_pct": 20.03,
                    "track_trap_runs": 2601
                },
                "at_this_grade": {
                    "grade": "S2",
                    "runs": 5,
                    "wins": 2,
                    "win_pct": 40
                },
                "layoff": {
                    "days_since_last_run": 6,
                    "band": "0-7",
                    "band_runs": 20,
                    "band_wins": 5,
                    "band_win_pct": 25
                }
            },
            {
                "trap": 5,
                "dog_id": 3043608518,
                "dog_name": "Kilbride Office",
                "pace": {
                    "avg_first_split_s": 13.99,
                    "runs": 3
                },
                "here": {
                    "runs": 3,
                    "wins": 0,
                    "places": 0,
                    "win_pct": 0,
                    "scope": "this track and distance"
                },
                "from_this_trap": {
                    "track_trap_win_pct": 15.64,
                    "track_trap_runs": 2544
                },
                "at_this_grade": {
                    "grade": "S2",
                    "runs": 1,
                    "wins": 0,
                    "win_pct": 0
                },
                "layoff": {
                    "days_since_last_run": 4,
                    "band": "0-7",
                    "band_runs": 1,
                    "band_wins": 0,
                    "band_win_pct": 0
                }
            }
        ],
        "thin": [
            {
                "trap": 5,
                "dog_name": "Kilbride Office",
                "reason": "3 runs at this track and distance",
                "min_runs": 6
            }
        ],
        "form_state_computed_utc": "2026-09-15 13:49:42",
        "note": "Measurements only, never a forecast. Form state is rebuilt nightly."
    }
}

Run it live

A real request from your browser straight to api.greyhoundapi.com with your own key — nothing is proxied or logged by this page.

GET/v1/races/{race_id}/field

Held in this tab only, sent only to the API host. No key yet? Create a free sandbox key — it runs every endpoint against the sandbox data window.

Related in Races