API Reference
US development intelligence — every output consumable programmatically.
Authentication
Authorization: Bearer <key>Generate tokens in Account → PAT Manager
Endpoints
bbox(string)Bounding box (minLng,minLat,maxLng,maxLat)
state(string)Two-letter state code (e.g. TX)
metro(string)Metro area name
from(string)Start date (YYYY-MM-DD)
to(string)End date (YYYY-MM-DD)
lat(float)Latitude center point
lng(float)Longitude center point
radius(float)Radius in miles
from(string)Start date
to(string)End date
type(string)Signal type filter
fips(string)5-digit FIPS code
q(string)Query
type(string)Layer type
Example
curl "https://metrosignals.com/api/heatmap?state=TX&from=2024-01-01&to=2024-12-31" \ -H "Authorization: Bearer YOUR_API_KEY"
Response Status Codes
200 Success
400 Bad request — check parameters
401 Unauthorized — missing or invalid API key
429 Rate limited — 120 req/min per IP
500 Internal error
Rate Limiting
120 requests per minute per IP. Exceeded requests return a 429 response:
{ "error": "rate_limited", "message": "Too many requests. Try again in a moment." }