Address validation API for your AI agent: US and worldwide addresses

    For ecommerce, operations and CRM teams whose AI agent handles postal addresses. Our tools validate US addresses and return them normalized with coordinates, match addresses in other countries to map records, split free text into fields and look up postal codes. No developer account or API key: your agent pays per check from one balance.

    9 tools. Pay per use from one balance, no API keys.

    Connect your AI AgentSee the tools

    Starting prices. Prices can vary with length and quality. Your AI Agent works out the exact price, runs the tool from your balance and tells you what it cost. Failed uses are free.

    What do you want your agent to do?

    • Validate a US address

      Check a US street address and get it back normalized, with coordinates.

      Best pick: Validate a US address, $0.013 per call

    • Match an address anywhere

      Match a free-text address to map records and get a standard form with a confidence estimate.

      Best pick: Strale Address Validate, $0.0422 per call

    • Split an address into fields

      Turn one line of text into street, city, postal code, state and country.

      Best pick: Strale Address Parse, $0.0702 per call

    • Geocode an address

      Latitude and longitude from OpenStreetMap, for maps and distance checks.

      Best pick: Strale Address Geocode, $0.0281 per call

    • Look up a postal code

      The city, region and rough location for a ZIP or postal code.

      Best pick: Strale Postal Code Lookup, $0.0281 per call

    • Check that a contact adds up

      Grade whether a name, phone, email, address and IP point to one consistent contact.

      Best pick: Verify contact details, $0.039 per call

    Our address validation tools and MCPs

    SourceBest forExample, today's price
    TrestleUS address validation and normalization, plus contact checksValidate a US address, $0.013 per call
    Map-based address matchingAddresses outside the US, matched to map records with a confidence estimateStrale Address Validate, $0.0422 per call
    OpenStreetMap geocodingCoordinates and address parts for an addressStrale Address Geocode, $0.0281 per call
    Postal code lookupCity and region for ZIP and postal codesStrale Postal Code Lookup, $0.0281 per call
    Address parserFree text split into street, city, postal code, state and countryStrale Address Parse, $0.0702 per call

    We haven't confirmed USPS CASS certification for any tool here. If you need CASS certified results, for example for bulk mail discounts, use a certified provider directly.

    How to choose the best address validation tool or MCP for you

    US only or worldwide

    The Trestle tool works on US addresses only. For other countries, use the map-based matcher and give your agent the country code for better matches.

    Validate, parse or geocode

    Parsing splits text into fields but doesn't check that the address exists. Geocoding finds coordinates. Validation matches the address to real records, and that is the step that catches bad addresses.

    One address or a list

    Your agent can check one address in a chat, or work through a spreadsheet column and return cleaned rows with a status for each address.

    If you needChooseToday's price
    A US shipping addressTrestle US validation$0.013 per call
    An address outside the USMap-based matcher$0.0422 per call
    Street, city and postal code in separate fieldsAddress parser$0.0702 per call
    Coordinates for a mapOpenStreetMap geocoder$0.0281 per call
    The city a ZIP code belongs toPostal code lookup$0.0281 per call
    Whether a lead's details fit togetherTrestle contact check$0.039 per call

    Quick picks: Trestle for US addresses, the map-based matcher elsewhere, the parser for messy text and the geocoder for coordinates.

    Why use Agensi instead of separate address APIs?

    Address APIs usually mean a developer account and an API key per provider, which is a lot of setup for cleaning a list now and then. With Agensi your agent validates, parses and geocodes addresses through one connection and pays per check from one balance, with no API keys. It runs without asking while your balance covers it, then tells you what it cost. Set limits or have it ask first in Dashboard → Balance.

    What you getOfficial MCP per brandOwn API key or community serverAgensi
    AccountsOne per brandOne per brandOne
    API keysPer brand, or a sign-inPer brand, kept by youNone
    PaymentA plan or credits per brandPer brandOne balance, per use
    Spending controlVariesUp to youLimits per use, day and month, or ask first
    Several sources in one answerConnect several serversSeveral servers and keysOne connection
    Skills for the whole jobNoNoYes, from the marketplace

    When another way is the better choice. For address autocomplete in a checkout or sign-up form, call an address API from your own site: an agent isn't part of that flow. For high-volume mailing that needs CASS certified results and postal discounts, a certified address provider is the better choice.

    Set up in your AI agent

    Connect your AI agent to Agensi once, sign in and click Allow. After that it can use every tool: it runs one from your balance and tells you what it cost. No API keys or provider accounts.

    1. Open Settings, then Connectors, then Browse connectors and add Agensi (or Add custom connector and paste https://mcp.agensi.io/mcp/auth).
    2. Sign in to Agensi and click Allow. One agent per account: connecting a new one disconnects the old one.
    3. Ask for what you want, for example: "Use Agensi to clean the 50 addresses in this sheet: validate the US ones, match the rest to map records and flag anything that fails." Top up from $5 if your balance is low; failed uses are free.

    Grok, VS Code, GitHub Copilot, Cline, Kiro and other agents with remote MCP and sign-in work too: see the setup guide.

    What it costs: a worked example

    "Use Agensi to clean the 50 addresses in this sheet: validate the US ones, match the rest to map records and flag anything that fails."
    About$1.088

    At today's starting prices. Your agent works out the exact price for your request and tells you what it cost.

    Combine address validation tools with skills

    Address validation MCP: frequently asked questions

    A service that checks a postal address against reference data, fixes its format and tells you whether it matches a real address. Many also return coordinates. Through Agensi your AI agent can use one without a developer account or API key of its own, and pays per check.

    No. USPS offers its own Addresses API, which needs a USPS business account and a registered app. Our US tool comes from Trestle and validates and normalizes US addresses through Agensi with no account of your own. We haven't confirmed it is CASS certified, so for bulk mail discounts use a certified provider.

    Yes. The map-based matcher compares an address with map records and returns a standard form with a confidence estimate. Results depend on the map data for each country, so treat a low-confidence match as a reason to check, not a final answer.

    Each tool shows its live price on this page. Your agent runs it from your Agensi balance without asking while the balance covers it, then tells you what it cost. You can set limits per use, day and month, or have it ask first, in Dashboard → Balance. Failed uses are free.

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    Questions, partnership ideas, or feedback on the platform? Tell us what's working and what isn't, we love to hear from you!

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    Samuel Rose

    Founder & CEO of Agensi

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    info@agensi.io

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