Introduction
What Signals Infra is, what data it serves, and how it's structured.
Signals Infra is the US public-company disclosure corpus, served as a REST API, an MCP server, and a cited answer engine. It is built first-party from the primary record — SEC EDGAR, FINRA, Senate/House disclosures, and issuer investor-relations sites — never repackaged from a third-party data vendor.
The product invariant: provenance
Every fact you get back carries a provenance object:
"provenance": {
"src_id": "src_kpi2_be16edbfefe50d35",
"source_provider": "sec",
"source_url": "https://www.sec.gov/Archives/edgar/data/1543151/000154315126000019/0001543151-26-000019-index.htm",
"accession": "0001543151-26-000019",
"quote": "Gross Bookings grew 25% YoY to $53.7 billion, and 21% on a constant currency basis.",
"content_hash": null,
"extracted_at": "2026-07-20T10:18:42.762293+00:00"
}quote is present for LLM-extracted facts (KPIs, extracted facts) and null for
structural facts (XBRL, prices). A serving-time allowlist guarantees no
vendor-sourced row can ever appear in a response — only sec,
signals_transcript, signals_ir, signals_rss, issuer-page, FINRA, and
licensed price providers pass the gate.
What's in the corpus
The Access column is the level at which each family unlocks — see Pricing for how levels map to a plan.
| Family | What it is | Access |
|---|---|---|
| Companies | Issuer universe, profiles, executives, segments, peers | Free |
| Events | Earnings calls, investor days — with their filing/deck/transcript bundle | Free |
| Filings | SEC filings (10-K/Q, 8-K, DEF 14A) + exhibit text | Free |
| Transcripts | First-party earnings-call transcripts (speakers, chapters, timestamps) | Builder+ |
| KPIs | Company-native operating metrics with quote + source per point | Free (delayed) / Starter (fresh) |
| Fundamentals | XBRL canonicals + statements | Free (12mo) / Starter (full) |
| Scores | Altman Z, Piotroski F, DCF, red flags | Starter |
| Ownership | Form 4 insider, 13F holdings, congress trades, short interest | Free |
| Funds | N-PORT holdings, NAV, fund-exposure inversion | Starter (alpha) |
| Prices | Daily bars (2016→) + corporate actions | Builder+ |
| Search | Semantic + keyword search across the whole corpus | Free |
| Ask | Cited answer engine over everything | Credit-metered |
Pricing
Start free — get an API key and the Free access level works with no card.
Beyond that, pricing is custom. Coverage, request volume, delivery (REST, MCP, flat files), and redistribution rights vary by team, so we scope a plan to what you're building rather than publishing fixed tiers. Schedule a call or email hi@signals.ai — twenty minutes is plenty for a first pass.
Alpha
The v1 surface is alpha. Schema names and types are stable. Breaking
changes get 90 days' notice via the Sunset and Deprecation response headers
(RFC 8594) and a changelog entry.