# Salvage Signal

> Chicago demolition-permit intelligence for architectural salvage, deconstruction, and building-material reuse. Public permits are ranked with explainable reuse signals; they never grant site access or guarantee recoverable inventory.

Salvage Signal serves architectural salvage buyers, deconstruction contractors, reuse organizations, material brokers, designers, and builders. The public lead board is free. The Chicago Daily Drop costs $39 per month; the first 10 founding subscribers pay $19 for the first month and then $39 monthly until canceled.

## Product and data

- [Live Chicago salvage lead board](https://salvagesignal.com/#live-feed): Human-readable ranked demolition signals from public City of Chicago permits.
- [Public signal API](https://salvagesignal.com/api/signals): Read-only JSON for current ranked signals; supports `limit` and `include_interior` query parameters.
- [Product discovery JSON](https://salvagesignal.com/api/discovery): Canonical audience, offer, source, safety, and contact facts.
- [Methodology](https://salvagesignal.com/#method): What is watched, read, ranked, and left for the user to verify.
- [Pricing and founding offer](https://salvagesignal.com/#pricing): Free board, $39 monthly Daily Drop, and $19 founding first month.

## Agent interfaces

- [OpenAPI 3.1 document](https://salvagesignal.com/openapi.json): Machine-readable public API contract.
- [A2A 1.0 agent card](https://salvagesignal.com/.well-known/agent-card.json): Standard discovery card for the stateless Salvage Signal agent.
- [A2A JSON-RPC endpoint](https://salvagesignal.com/api/a2a): Use `SendMessage` to retrieve five signals or canonical product facts.
- [Full machine context](https://salvagesignal.com/llms-full.txt): Detailed facts, limits, terminology, and safe-use guidance.

## Policies

- [Terms and privacy](https://salvagesignal.com/legal): Subscription, acceptable-use, privacy, and refund terms.

## Source of record

- [City of Chicago Building Permits](https://data.cityofchicago.org/Buildings/Building-Permits/ydr8-5enu/about_data): Official municipal dataset used for permit fields.

## Optional

- [EPA Deconstruction Rapid Assessment Tool](https://www.epa.gov/large-scale-residential-demolition/deconstruction-rapid-assessment-tool): External deconstruction guidance.