canonical: https://jentic.com/apis/addressintel.co/addressintel # AddressIntel Peninsula Entitlement API The AddressIntel Peninsula Entitlement API returns parcel-level development data for the Silicon Valley Peninsula and South Bay: SB 9 status, ADU yield, and FAR headroom per lot, each citing the municipal code section it came from and the date it was read. Agents can list SB 9 inventory, redevelopment and ADU leads, and market signals, or pull full intelligence for one property by id. Coverage is regional by design, joined to building permits, listings, and comparable sales. ## For AI agents Query parcel-level entitlement data, ADU yield, and redevelopment leads for the Silicon Valley Peninsula and South Bay, with code citations. ## Scope Does not handle nationwide coverage, mortgage lending, or title and escrow. Use for Peninsula and South Bay parcel entitlement data only. ## Capabilities - List SB 9 inventory for parcels in the covered region - List redevelopment and ADU leads with their yield figures - Pull market signals joined to permits, listings, and comparable sales - Get full entitlement intelligence for one property by id - Register a webhook to receive new leads and signals ## Use cases ### Agent-Driven Parcel Research A developer's agent researches what can be built on a given lot. The AddressIntel API returns full entitlement intelligence for one property by id, including SB 9 status, ADU yield, and FAR headroom, each with the municipal code section and read date, so the agent reports grounded development potential rather than guesses. Example prompt: Fetch the entitlement intelligence for a property id and summarize its SB 9 status, ADU yield, and FAR headroom with code citations ### Lead Discovery for Developers An acquisitions team hunts for redevelopment and ADU opportunities across the Peninsula. The AddressIntel API lists redevelopment leads and ADU leads with their yield figures, so an agent can pull a ranked list of candidate parcels and pass the strongest ones to the team. Example prompt: List current ADU and redevelopment leads in the region and return the parcels with the highest yield ### Entitlement Due Diligence A buyer verifies a parcel's development claims before closing. The AddressIntel API joins SB 9 status and yield to building permits, listings, and comparable sales, and cites the code section and date for each figure, so an agent can assemble a due-diligence summary with its sources attached. Example prompt: Pull the market signals and entitlement data for a parcel and compile a due-diligence summary with its code citations ## Key endpoints | Method | Path | Description | | --- | --- | --- | | GET | `/v1/sb9-inventory` | List SB 9 inventory | | GET | `/v1/redevelopment-leads` | List redevelopment leads | | GET | `/v1/adu-leads` | List ADU leads | | GET | `/v1/market-signals` | List market signals | | GET | `/v1/properties/{id}` | Get full property intelligence | | POST | `/v1/webhooks/register` | Register a webhook for leads and signals | ## Key resources - **SB 9 Inventory** — List SB 9 eligible parcels in the covered region - **Leads** — List redevelopment and ADU leads with yield figures - **Market Signals** — Pull signals joined to permits, listings, and comparable sales - **Property Intelligence** — Get full entitlement intelligence for one property by id - **Webhooks** — Register a webhook to receive new leads and signals ## AI readiness This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use. - **Score:** 61 / 100 - **Maturity:** AI-Aware - **Dimensions:** - Foundational Compliance: 73 / 100 - Developer Experience & Jentic Compatibility: 64 / 100 - AI-Readiness & Agent Experience: 43 / 100 - Agent Usability: 94 / 100 - Security: 50 / 100 - AI Discoverability: 83 / 100 - **View full report:** https://jentic.com/apis/addressintel.co/addressintel/scorecard - **How the score is calculated:** https://docs.jentic.com/reference/api-readiness-framework/overview/ - **More about the dimensions:** https://docs.jentic.com/reference/api-readiness-framework/specification/#dimensional-model-overview ### Score it yourself Every API in the directory is allowlisted, so you can re-score it with no key required. - **Score your own API:** https://jentic.com/scorecard.md - **Scoring CLI agent skill:** https://github.com/jentic/jentic-api-scorecard/blob/main/skills/jentic-api-scorecard/SKILL.md ```sh npx @jentic/api-scorecard-cli score ``` ## Why Jentic - **Setup:** Wiring AddressIntel by hand means handling its header API key and knowing which endpoints are open and which require it. Through Jentic you install once, import it from the API Directory, store the key once, and your agent calls it. - **Permission scoping:** You choose which AddressIntel operations your agent may call, so it can read inventory, leads, and property intelligence while the webhook-registration and subscription operations stay out of the set unless you add them. - **Credential handling:** Your AddressIntel key is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context. - **Discovery method:** Agents search Jentic by intent such as 'get entitlement data for a property' or 'find redevelopment leads', and Jentic returns the matching AddressIntel operation with its input schema so the agent calls the right endpoint without browsing the reference docs. ## Related APIs - **ATTOM Data** — ATTOM provides nationwide property and parcel data; AddressIntel provides deeper entitlement math for the Peninsula and South Bay. - **RentCast** — RentCast focuses on rent estimates and market data nationally; AddressIntel focuses on development entitlement for specific parcels. - **SimplyRETS** — SimplyRETS exposes MLS listings; AddressIntel adds the entitlement and development context for those parcels. ## FAQ ### What authentication does the AddressIntel Peninsula Entitlement API use? The AddressIntel API authenticates with an API key sent in a request header, per its OpenAPI spec. Creating a free key and subscribing to briefings are open, while the data endpoints require the key. Through Jentic the key is stored encrypted by your own Jentic One instance and injected at call time, so it never reaches the agent's context. ### Can I get entitlement data for a specific property? Yes. The API returns full entitlement intelligence for one property by id, including SB 9 status, ADU yield, and FAR headroom, each citing the municipal code section and the date it was read. An agent can pull that record and the related market signals in one research pass. ### What are the rate limits for the AddressIntel Peninsula Entitlement API? The OpenAPI spec does not define rate limits. Check the AddressIntel documentation at https://addressintel.co for the current limits, including any difference between the free tier and a Pro key. ### How do I research a parcel through Jentic? Import the AddressIntel API from the Jentic directory and give your agent an intent such as 'get entitlement data for a property'. Jentic returns the property-intelligence operation with its input schema, your agent supplies the property id and reads the result, and your stored key is injected at execution time. To run it on your own infrastructure, install Jentic One from its GitHub repo. ### Can I limit what my agent is allowed to do with the AddressIntel Peninsula Entitlement API? Yes. Write a rule that allows only the data-read operations, such as listing inventory and leads and reading a property, so your agent cannot register webhooks or change the subscription, and every call it makes is logged. ### Is there an AddressIntel MCP server? You don't need an MCP server to give your agent the AddressIntel API. Jentic connects it directly from the API Directory: import it, store your credential once, and your agent calls it, so no extra server's tool definitions sit in the agent's context.