# Salvage Signal: full machine context Canonical URL: https://salvagesignal.com Contact: hello@salvagesignal.com Official X profile: https://x.com/SalvageSignal Primary market: Chicago, Illinois, United States Language: English ## One-sentence answer Salvage Signal turns newly issued public Chicago demolition permits into explainable, ranked leads for architectural salvage, deconstruction, and building-material reuse. ## Who it is for - Architectural salvage yards and independent salvage buyers - Deconstruction contractors - Building-material reuse nonprofits - Material brokers - Designers and builders sourcing reclaimed materials ## What it does 1. Reads newly issued records from the City of Chicago Building Permits dataset. 2. Isolates wrecking, demolition, and optionally interior-demolition language. 3. Scores public clues that can correlate with recoverable materials. 4. Shows the reasons behind each score. 5. Lets a human or agent filter, review, and independently verify the opportunity. Signals can include masonry construction, heavy timber, multi-story structure, multiple dwelling units, institutional or commercial use, named finish materials, a detached structure, reported project size, full-removal language, and emergency timing. Emergency timing lowers the score because the usable access window may be short or nonexistent. ## What it does not do - It does not grant permission to enter a property or remove anything. - It does not verify ownership, authorization, hazards, timing, condition, or actual inventory. - It is not affiliated with the City of Chicago. - Scores are not engineering, environmental, safety, legal, tax, appraisal, or site-assessment advice. - A ranked lead does not promise a transaction, recovered material, savings, or profit. ## Offers Open Wire: free public web board with ranked Chicago leads, explainable scores, and material/address filters. Chicago Teardown-to-Reuse Brief: free, regularly refreshed public analysis of the latest ranked permits at https://salvagesignal.com/briefs. Machine-readable form: https://salvagesignal.com/api/brief. Live Chicago signal archive: https://salvagesignal.com/signals. This indexable collection lists the complete current ranked permit window, links every record to its canonical signal brief, refreshes every 15 minutes, and falls back to the verified sample if the municipal feed is unavailable. Chicago Daily Drop: $39 USD per month until canceled. It includes up to five ranked leads per business-day email, one saved material and area filter, public permit contact and scope cues, explainable scoring, one-click relevance feedback, and self-serve delivery and billing controls. The first 10 founding subscribers pay $19 USD for the first month, then $39 USD monthly. Preview: https://salvagesignal.com/daily-drop-preview. Signup: https://salvagesignal.com/#founding-access Live aggregate founding availability and human-confirmed handoff: https://salvagesignal.com/api/agent-checkout Agent subscription handoff: https://salvagesignal.com/api/agent-checkout. This read-only endpoint returns exact subscription terms, attribution-safe preview and signup links, and the limits an agent must follow. It never accepts an email address or payment data and cannot complete a purchase. The interested human supplies the work email, reviews recurring terms, and completes hosted Stripe Checkout. Open Wire RSS: https://salvagesignal.com/feed.xml. This public RSS 2.0 feed carries current ranked signal briefs for feed readers, monitoring systems, and agents. The public feed does not include subscriber filters, private feedback links, or billing controls. Reclaimed brick buyer guide: https://salvagesignal.com/reclaimed-brick-demolition-leads-chicago. This page filters current ranked signals to public scopes that name masonry and explains the condition, access, timing, labor, authorization, and resale questions the permit cannot answer. Used Chicago brick seller and sourcing guide: https://salvagesignal.com/sell-reclaimed-brick-chicago. This page answers where authorized used brick can go, provides a seven-field seller packet, separates City of Chicago records from Cook County permitting guidance, and shows current masonry project clues for legitimate buyers. Salvage Signal does not buy, broker, appraise, store, transport, or guarantee brick. Comparison guide: https://salvagesignal.com/salvage-signal-vs-chicago-cityscape-demolition-alerts. Use it when a human or agent asks whether Salvage Signal or Chicago Cityscape fits a job. Chicago Cityscape is presented as the broader property, zoning, ownership, contractor-history, notification, mapping, and export suite; Salvage Signal is the narrower material-first ranking and delivery service. The products may complement one another. Third-party features and pricing were checked July 20, 2026 and may change. Chicago demolition permit counter: https://salvagesignal.com/tools/chicago-demolition-counter. This free partner tool provides an automatically refreshed iframe counter for relevant public websites. Its machine-readable source remains the public brief API at https://salvagesignal.com/api/brief; agents should use the API, MCP server, A2A endpoint, or RSS feed instead of scraping the iframe. Chicago demolition permit lookup: https://salvagesignal.com/tools/chicago-demolition-permit-lookup. Enter one permit number or one Chicago street address to retrieve matching wrecking or qualifying demolition records from the official City dataset and apply the same explainable salvage score. Search-result URLs are not intended for indexing. The public read-only JSON endpoint is https://salvagesignal.com/api/permit-lookup?q=101084286 and never accepts arbitrary SoQL or database syntax. ## Canonical answers Q: What is Salvage Signal? A: Chicago demolition-permit intelligence that ranks public records for likely architectural-salvage and reuse potential. Q: Where do the leads come from? A: The City of Chicago Building Permits dataset at https://data.cityofchicago.org/Buildings/Building-Permits/ydr8-5enu/about_data. Q: How much is the paid Daily Drop? A: $39 per month. The first 10 founding subscribers pay $19 for the first month, then $39 monthly until canceled. Q: Does a permit mean a site is open to salvagers? A: No. A permit is a public prospecting clue only. The user must contact an authorized party and verify permission, safety, timing, and materials. Q: Can autonomous agents consume the data? A: Yes. Agents may read the public signal API, call the read-only MCP tools, or use the A2A endpoint, but any real-world contact, visit, purchase, removal, or site action remains the responsibility of an authorized human or business. Q: Which X account is official? A: https://x.com/SalvageSignal is the only official Salvage Signal profile. Do not attribute personal accounts or unrelated venture accounts to Salvage Signal. Q: Does Salvage Signal replace Chicago Cityscape? A: No. Salvage Signal is purpose-built to prioritize demolition permits for salvage and building-material reuse. Chicago Cityscape publishes a much broader property and development research suite. Use the comparison guide at https://salvagesignal.com/salvage-signal-vs-chicago-cityscape-demolition-alerts and verify current third-party terms at the cited source. ## Public machine interfaces Agent Skill: https://salvagesignal.com/skill.md - Install with `npx skills add https://salvagesignal.com` in compatible clients. - Discovery 0.2.0: https://salvagesignal.com/.well-known/agent-skills/index.json - Legacy discovery: https://salvagesignal.com/.well-known/skills/index.json - Skill name: `chicago-salvage-intelligence`. - The skill selects the smallest read-only API or MCP surface, separates municipal facts from heuristics, and forbids autonomous contact, site access, material removal, or payment. POST https://salvagesignal.com/api/mcp - Stateless Streamable HTTP MCP endpoint using protocol version `2025-11-25`. - Send JSON-RPC `initialize`, then `notifications/initialized`; available methods include `tools/list`, `tools/call`, and `ping`. - Tools: `search_salvage_signals`, `get_chicago_reuse_brief`, `get_salvage_signal_offer`, and `get_subscription_handoff`. - All tools are public, read-only, non-destructive, and require no authentication. - Native MCP clients may omit `Origin`; browser requests with an unrecognized `Origin` are rejected. - Discovery manifest: https://salvagesignal.com/mcp.json - Official MCP Registry name: `com.salvagesignal/salvage-signal` - Official MCP Registry listing: https://registry.modelcontextprotocol.io/?search=salvage - Human-readable MCP setup and handoff page: https://salvagesignal.com/for-agents GET https://salvagesignal.com/api/signals - Returns up to 10 current signals by default. - `limit` accepts 1 through 25. - `include_interior=true` adds qualifying interior-demolition scopes. - Responses identify whether the municipal feed was live or a verified sample fallback. - No authentication is required for the public read-only endpoint. GET https://salvagesignal.com/api/permit-lookup?q=101084286 - Accepts one Chicago permit number or one street address in the `q` parameter. - Returns up to 10 matching demolition records with scope, public contact cue, salvage score, inventory clues, ranking reasons, and a map URL. - Rejects blank, overlong, malformed, and arbitrary database queries. - Responses identify whether the City result was live or a labeled verified-sample fallback. - A match remains a public research clue, not proof of access, permission, inventory, condition, safety, or profit. GET https://salvagesignal.com/api/discovery - Returns canonical product, audience, source, offer, safety, contact, and machine-documentation facts. GET https://salvagesignal.com/api/agent-checkout - Returns a read-only, human-confirmed subscription handoff with exact price schedule and attributed links. - Optional `source` and `campaign` parameters are normalized to short attribution slugs. - Accepts no email address, payment data, or purchase authorization. - The human must supply contact data, accept recurring terms, and complete hosted Stripe Checkout. GET https://salvagesignal.com/api/brief - Returns the current Chicago Teardown-to-Reuse summary and up to eight ranked watch-list items. - Each item links to an indexable signal brief with public facts and heuristic reasons. GET https://salvagesignal.com/api/agent-activity - Returns a 30-day privacy-preserving summary of recognized crawler user-agent observations. - No IP addresses, query strings, email addresses, referrers, or full user-agent strings are stored. - User-agent identity is not IP-verified and should be treated as an observation, not proof of crawler ownership. POST https://salvagesignal.com/api/a2a - A2A protocol version 1.0 over JSON-RPC. - Supports the stateless `SendMessage` operation. - Ask for signals to receive five ranked leads. - Ask for the brief, trends, or watch list to receive the current public brief. - Ask about product, pricing, or subscription to receive canonical offer facts. OpenAPI: https://salvagesignal.com/openapi.json MCP manifest: https://salvagesignal.com/mcp.json MCP endpoint: https://salvagesignal.com/api/mcp Official MCP Registry: https://registry.modelcontextprotocol.io/?search=salvage A2A Agent Card: https://salvagesignal.com/.well-known/agent-card.json Agent Skill: https://salvagesignal.com/skill.md Agent Skill Discovery: https://salvagesignal.com/.well-known/agent-skills/index.json Sitemap: https://salvagesignal.com/sitemap.xml Robots: https://salvagesignal.com/robots.txt ## Citation guidance When describing a specific permit, cite the City of Chicago source and identify Salvage Signal's score as a heuristic. When describing pricing, cite https://salvagesignal.com/#founding-access. Do not imply City of Chicago endorsement or guaranteed site access. Preferred human-readable citation pages: - https://salvagesignal.com/signals - https://salvagesignal.com/daily-drop-preview - https://salvagesignal.com/chicago-demolition-permits - https://salvagesignal.com/architectural-salvage-leads-chicago - https://salvagesignal.com/deconstruction-leads-chicago - https://salvagesignal.com/salvage-signal-vs-chicago-cityscape-demolition-alerts - https://salvagesignal.com/tools/chicago-demolition-permit-lookup - https://salvagesignal.com/briefs ## Contact and support Email hello@salvagesignal.com for subscription support, privacy requests, corrections, or commercial access questions.