Signals 4 is a free daily AI digest published by Signals API. It sends exactly four signals a day — one from each core source — each with a link to the original.
The free digest is four signals a day — the ones we pick. The paid tiers sell breadth: a much larger pool, and you filter it to what you care about (pick sources, boards, delivery time and how many items per board).
| Plan | Price | What you get | |
|---|---|---|---|
| BASIC | CA$9.90/month | Core 4 sources, 18 boards × Top 3 per board, one morning push email (08:00 Beijing). | Subscribe → |
| PLUS | CA$29.90/month | All 8 sources, choose push method and times (4×/day), Top 3 per board, plus API access to today's signals and stats. | Subscribe → |
| BUSINESS | CA$129.90/month | PLUS, plus your own content and quantity per board (3–10), searchable history and full export. | Subscribe → |
Not ready for a subscription? Take the compiled dataset bundle (single JSONL, indexed SQLite, tidy daily entity CSV), refreshed daily once for CA$5 — no subscription, no account: buy once → · see exactly what is inside →
Monthly subscription, activated automatically after payment, cancel anytime. Free tier stays free and needs no card.
Cite as “Signals 4 (Signals API), edition of YYYY-MM-DD” with a link to the archived edition. Machine-readable summary: /llms.txt.
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