Data source licenses and terms of use for Signals, the DRM3 open data ingestor.
Every data source ingested by Signals is documented here with its license type, restrictions, and terms URL. All fetched data is provenance-signed with Ed25519 per-row receipts.
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| Congress.gov | US Gov Public Domain | Yes | No | api.congress.gov |
| Federal Register | US Gov Public Domain | No | No | federalregister.gov |
| FRED | Free API | Yes | Yes | fred.stlouisfed.org |
| GovInfo | US Gov Public Domain | Yes | No | api.govinfo.gov |
| GSA .gov | US Gov Public Domain | No | No | gsa.gov |
| SEC EDGAR | US Gov Public Domain | No | No | sec.gov/edgar |
| US Census | US Gov Public Domain | No | No | census.gov/data |
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| Binance | API ToS | No | Yes | binance.com/terms |
| Etherscan | API ToS | Yes | Yes | etherscan.io/terms |
| FDIC | US Gov Public Domain | No | No | fdic.gov |
| NASDAQ | FTP Public | No | No | nasdaqtrader.com |
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| Open-Meteo | CC BY 4.0 | No | Yes | open-meteo.com/terms |
| USGS Earthquakes | US Gov Public Domain | No | No | earthquake.usgs.gov |
| USGS Water | US Gov Public Domain | No | No | waterservices.usgs.gov |
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| GDELT | Free / Academic | No | Yes | gdeltproject.org |
| GitHub Activity | API ToS | No | Yes | docs.github.com |
| API ToS | No | Yes | reddit.com/wiki/api-terms |
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| Polymarket | Free API | No | No | polymarket.com/terms |
| Source | License | Key | Attribution | Terms |
|---|---|---|---|---|
| Cisco Umbrella | Free Top 1M | No | No | umbrella.cisco.com |
| Google Safe Browsing | API ToS | Yes | Yes | developers.google.com |
| Majestic | Free Million CSV | No | Yes | majestic.com/terms |
| Mozilla Observatory | MPL 2.0 | No | No | observatory.mozilla.org |
| Tranco | Free / Academic | No | Yes | tranco-list.eu |
- US Gov Public Domain - Federal government data, no restrictions
- CC BY 4.0 - Free to use with attribution (Open-Meteo)
- API ToS - Proprietary terms, typically allows display but not raw resale
- Free / Academic - Open for non-commercial use, attribution expected
- MPL 2.0 - Mozilla Public License, open source
- FTP Public - Publicly available FTP data (NASDAQ)
- Free Top 1M / Free Million CSV - Freely distributed ranking datasets
All data is:
- Fetched via public APIs on a scheduled cadence
- Signed with Ed25519 per-row provenance receipts (row-level attestation)
- Rolled up into Merkle trees per batch
- Stored in D1 (7-day hot cache) and BigQuery (permanent archive)
- Served via authenticated API with provenance verification
We do NOT resell raw data. All data is transformed via provenance signing and aggregation.