The thesis: one assessor scrape, many buyers. Each stream is sold to its own buyer; the county data behind them is shared, so adding a stream is near-zero marginal cost — and that's reflected in the price.
Pick a stream + county: over-assessment (tax-appeal firms), construction-financing window (hard-money / construction lenders), or exemption-contradiction flags (recovery contractors). Full PIN-level feed, high+medium tiers, weekly first-seen delta, source links, 50 leads/call, 1,000 calls/day.
Every stream for a single county at a bundle price — for a multi-line firm (e.g. a tax-services shop that does both appeals and exemption recovery). All tiers, 200 leads/call, 5,000 calls/day, full first-seen delta + new-candidate webhook each cycle.
Pay only for the candidates you pursue. Construction-window lender leads $25–100; over-assessment $40–150; exemption-recovery flags priced to the contractor's contingency. Good for testing a channel before a subscription.
Autonomous agents call overassessment_leads, construction_window_leads, or exemption_flags over MCP and settle USDC on Base mainnet per pull — no account, no key. Free preview (counts + redacted samples) included. See Developers.
Pay by invoice (invoice@dropwatchhq.com), USDC on Base, or x402 per-call. Reach us to start a county or a stream. Honest note: signal density is uneven and we tell you before you buy. Over-assessment needs a public sale price — live in Cook IL, Allegheny PA (thin: 2024 reassessment), Philadelphia PA, King WA, Maricopa AZ. In non-disclosure states (TX, GA) there is no public sale price, so we run the exemption-flag stream instead (Travis TX, Harris TX, Fulton GA). The live coverage map on the home page shows exactly which county × stream is on, with honest nulls.