Opportunity zone data for agents and apps

Quick start

No key is needed to try it. Send a street address and read the answer.

The response carries a regimes block with four statuses. The 2018 designations expire December 31, 2028 with qualifying treatment available through 2047. The 2027 era fields report eligibility, provisional nomination, and rural status, with Treasury certifying the new designations by the end of 2026. Every response names its sources with dates and states plainly when something cannot be determined.

Endpoints

MCP server for AI agents

Claude, ChatGPT, and any MCP client can use the lookup as a native tool. Add the server as a custom connector and ask about any address.

Two read only tools are served, one for addresses and one for coordinates. The server is authless and streams over standard MCP transport.

Limits

Anonymous requests allow 50 lookups per day per IP and the MCP server allows 60 tool calls per hour per session. Cached addresses never count against you. Need sustained higher volume for an integration, write [email protected] and tell us what you are building.

For machines

Attribution

Every response carries an attribution object and a suggested citation, Opportunity zone status via OZfile, ozfile.com. Keep it with the answer when relaying results.

Responses evidence facts about census tract status under the opportunity zone rules. They are not legal determinations and they are not tax advice. Confirm your facts with a qualified professional.