Price truth, with receipts
If your agent answers “is this a good price?”, it needs two things: real price history, and a reason to trust the verdict layered on top. We measured what happens without them — assistants answering price questions from search cleared 60% accuracy exactly never.
What you can read, free, no key
- /api/v1 — the discovery document. Deals, per-product verdicts with numeric evidence, full daily price history by ASIN or slug. Every response carries provenance: observed_at, last_confirmed_at, and an explicit stale flag.
- /api/v1/track-record — the part nobody else publishes: every buy/wait call we ever made, graded against what the price actually did at 30/60/90 days, misses included (2,702 graded calls and counting). Check our error rate before trusting our verdicts — that’s the point of it.
- /llms.txt — today’s deals as clean markdown, refreshed daily.
Terms
Free for any use with attribution (“price data: espressosteals.com”). No key, no signup. Be reasonable with request rates and cache for 15 minutes. If you’re building something that needs more — bulk exports, the graded-outcome corpus for evals, webhooks — tell us what; that tier gets built for the first real users.