Melissa Property Data API
✓ Official Vendor SpecData EnrichmentAddress ValidationapiKey1 EndpointsREST
For Agents
Look up detailed US property records — ownership, valuation, deed history, and parcel attributes — by address or APN. Returns assessor and recorder data for residential and commercial parcels.
Use for: Look up the current owner of a US property by street address, Retrieve the last sale price and date for a residential parcel, I want to enrich a lead record with property valuation data, Find the assessed value and tax amount for a specific APN
Not supported: Does not handle person enrichment, address autocomplete, or geocoding — use for US parcel-level property record lookups only.
The Melissa Property Data API delivers detailed US property records including assessor, deed, mortgage, and ownership information for over 140 million parcels nationwide. The single LookupProperty endpoint accepts a property identifier or address and returns valuation estimates, lot characteristics, building attributes, and the most recent transaction history. Common use cases include underwriting, real estate due diligence, lead enrichment, and tax assessment workflows.
Install Jentic One Beta
Connect the Melissa Property Data API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Melissa Property Data API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Melissa Property Data API.
Retrieve current and historical assessed value, market value, and tax records for a US parcel
Resolve a parcel by address, FIPS code, or assessor parcel number (APN) in a single LookupProperty call
Pull deed and mortgage transaction history including sale price, loan amount, lender, and recording date
Return building attributes such as square footage, year built, bedroom count, and lot size for underwriting
Identify legal owner and mailing address for direct-mail and skip-tracing workflows
Enrich a real estate CRM record with parcel-level data without scraping county assessor sites
Use Cases
Patterns agents use Melissa Property Data API for, with concrete tasks.
★ Real Estate Lead Enrichment
Enrich inbound real estate leads with parcel-level data including current assessed value, last sale price, owner name, and building attributes. The single LookupProperty endpoint returns this information in one call keyed by address or APN, which lets brokers and proptech apps qualify leads in under a second instead of pulling fragmented data from county sites.
Call LookupProperty with the inbound lead's street address and zip code, return owner name, last sale price, last sale date, and assessed value, and write them back to the CRM record.
Mortgage and Lending Underwriting
Pull recorded deed and mortgage history during loan origination to verify ownership, identify existing liens, and confirm the recorded sale price matches the application. Underwriters use the API to validate borrower-stated property details against assessor records before pricing risk.
For a given subject property address, retrieve the last three recorded transactions, the current mortgage lender, and the assessed value, then flag any mismatch with the borrower-stated purchase price.
Direct Mail Skip Tracing
Resolve an address to a current legal owner and a tax-bill mailing address so off-market real estate investors can target absentee owners. The API returns both the situs address and the owner mailing address, which lets campaign tooling segment owner-occupied versus investor-held properties.
Take a list of 1,000 target addresses, call LookupProperty for each, and return only the parcels where the owner mailing address differs from the situs address along with the owner's full name.
AI Agent Property Research
An AI agent acting on behalf of a real estate analyst can resolve any natural-language question about a US parcel — owner, value, taxes, last sale — into a single LookupProperty call. Through Jentic, the agent receives the input schema and parses the structured response without browsing Melissa documentation or building a custom client.
Given the user request 'who owns 123 Main St in Austin TX and what's it worth', search Jentic for 'look up US property data', load the LookupProperty schema, execute with the parsed address, and return owner and assessed value.
Key Endpoints
1 endpoints — the melissa property data api delivers detailed us property records including assessor, deed, mortgage, and ownership information for over 140 million parcels nationwide.
METHOD
PATH
DESCRIPTION
GET
/
Look up property records for a US parcel by address, APN, or FIPS code
GET
/
Look up property records for a US parcel by address, APN, or FIPS code
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
Melissa requires the license key in the `id` query parameter. Jentic stores the key encrypted in the MAXsystem vault and injects it at request time, so the raw key never appears in agent context or logs.
Intent-based discovery
Agents search Jentic for intents like 'look up US property data' or 'get owner by address' and receive the LookupProperty operation with its full input schema, ready to execute.
Time to first call
Direct integration: 1-2 days to handle Melissa's parameter aliases (FreeForm, AddressLine1+City+State, APN+FIPS) and parse the wide response schema. Through Jentic: under 30 minutes.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Melissa Property Data API through Jentic.
What authentication does the Melissa Property Data API use?
The API uses an API key passed as the `id` query parameter on every request. Through Jentic, the key is stored in the encrypted vault and injected at execution time, so the raw credential never enters the agent's prompt or chat history.
Can I look up a property by APN instead of street address?
Yes. LookupProperty accepts an assessor parcel number combined with a FIPS county code as an alternative to the address-based lookup, which is useful when working from county assessor exports.
What are the rate limits for the Melissa Property Data API?
Melissa enforces credit-based metering rather than per-second rate limits — each LookupProperty call consumes credits from your subscription. The exact rate depends on your contract tier; check the credits remaining header on each response.
How do I look up a property through Jentic?
Run `pip install jentic`, search for `look up US property data`, then call `client.execute` against the LookupProperty operation with the address or APN. Jentic returns the structured JSON response with assessor, deed, and owner fields.
Does the Melissa Property Data API cover commercial properties?
Yes. The dataset includes residential and commercial parcels across all US counties, though attribute coverage is denser for residential properties. Commercial records reliably include owner, assessed value, and lot data; building-level attributes vary by jurisdiction.
Is the Melissa Property Data API free?
No. Melissa offers a small free trial credit pack, but production usage requires a paid subscription priced per credit. Each property lookup consumes credits at a rate set by your plan.
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