Delos API · v1

Build on the world’s public-need infrastructure.

Every Signal Score, brief, and data product - behind one clean, versioned REST API. Free to start, rate-limited per key, JSON all the way down.

Get an API key Read the reference
Quickstart

Three steps to your first request

  1. 1

    Create a key

    Generate a free key below - no credit card.

  2. 2

    Send it as a header

    Pass X-API-Key on every request to /v1.

  3. 3

    Build

    Wire briefs, scores, and data products into your app.

Your first request
curl https://delos-api-655533220686.us-central1.run.app/v1/briefs?limit=5 \
  -H "X-API-Key: sig_live_your_key_here"
Authentication

Get an API key

Reference

Endpoints

GET/v1/briefsList opportunity briefs, ranked by Signal Score.
GET/v1/briefs/{brief_id}Full brief detail with scored sub-components.
GET/v1/score/{fips}Signal Score + sub-scores for a census tract.
GET/v1/products/broadband-dark-zonesWorst-served broadband tracts (BEAD targeting).
Examples

Call it from anywhere

curl "https://delos-api-655533220686.us-central1.run.app/v1/score/42003020100" \
  -H "X-API-Key: sig_live_your_key_here"
Limits

Rate limits & tiers

Free

60 req/min

Prototyping & civic hacks

StandardPopular

300 req/min

Production apps & dashboards

Partner

1,200 req/min

High-volume & research

Every response includes X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset headers. Exceeding your limit returns 429 with a Retry-After.

Attribution

Show you’re Built on Delos

Built on Delos

Using Delos data in your product? Add the badge - it links back and helps communities discover the tools being built for them.

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