Check ILSmart part availability through an API

What you can build on ILS

• Get a part's listing summary

  Build this

  Searches one part number on ILS and reads its descriptions, manufacturers, condition codes and counts of availability listings, MRO / repair capability and PMA sources.

  Takes

  Part number

  Returns

  Part number, descriptions, manufacturers, ATA chapter, condition codes, counts of availability listings, MRO capability, PMA sources, MCRL references, Airworthiness Directives, Message Broadcasts

• Get alternate part numbers and NSNs

  Build this

  Reads the alternate part numbers sellers list a part under, and the NSNs linked to it, so your checks can include each equivalent.

  Takes

  Part number

  Returns

  Part number, alternate part numbers, NSNs, manufacturers

• Check your RFQ Recipient addresses

  Build this

  Opens My ILS, Set Preferences, then Company Profile, and reads the email addresses in the RFQ Recipient and MRO RFQ Recipient tiles.

  Takes

  Nothing

  Returns

  RFQ Recipient addresses, MRO RFQ Recipient addresses

• Send an RFQ to selected vendors

  Build this

  Searches a part number and sends an RFQ for it to the vendors you pick from the results.

  Takes

  Part number, quantity, condition code, vendors

  Returns

  Part number, quantity, condition code, vendors sent to, sent at

Automate ILS with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Weekly availability check of your part watch list

  Build this

  Starts

  Every Monday at 7:00

  Step 1

  For each part number on your list, get its listing summary on ILS.

  Step 2

  Keep the parts whose availability listings or MRO capability count changed since the last run.

  Step 3

  Email you the list with part number, condition codes and the old and new counts.

• Shortage parts, checked when your ERP flags them

  Build this

  Starts

  When your system calls the workflow's webhook with a list of part numbers

  Step 1

  For each part number, get its listing summary on ILS.

  Step 2

  Get its alternate part numbers and NSNs.

  Step 3

  Post part number, availability listings, condition codes and alternates to your ERP's webhook.

• RFQ Recipient addresses, checked every week

  Build this

  Starts

  Every Friday at 16:00

  Step 1

  Read the RFQ Recipient and MRO RFQ Recipient tiles in Company Profile.

  Step 2

  Stop when nothing changed since the last run.

  Step 3

  Email you the old and new addresses.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get a part's listing summary” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "marketplace.ilsmart.com/get_part_listing_summary",
    "input": {
      "part_number": "AC-4471-02"
    }
  }'

{
  "status": "completed",
  "data": {
    "part_number": "AC-4471-02",
    "descriptions": [
      "Actuator"
    ],
    "manufacturers": [
      "Acme Aerospace"
    ],
    "ata_chapter": "Landing Gear",
    "condition_codes": [
      "NE"
    ],
    "parts_availability_listings": 42,
    "mro_repair_capability": 5,
    "mcrl_references": 18,
    "pma_sources": 2,
    "airworthiness_directives": 0,
    "message_broadcasts": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

ILS’s own options

ILS offers Web Services in XML and JSON for part searches, reviewing RFQs and updating your inventory listings from your own system, in bundles for buyers, sellers, MROs and government. ILS Bridge connects Quantum Control, CORRIDOR, Pentagon and CAMP IMS to the marketplace. Prices are not published: you arrange both with ILS.

Read on November 12, 2026: ILS Integration.

Signing in to ILS

ILS signs people in at marketplace.ilsmart.com with an ILS User ID and password. A company's root User ID is shown under My ILS, Set Preferences, on the User tab, and defense and government users request their User ID from ILS. With Fous you sign in once with your own account, the login is sealed with AES-256, and code and AI agents never see it.

Worth knowing

Listing files are loaded on business days

Uploaded listings are processed during ILS business hours, US Central time, Monday to Friday, not on US holidays, and can take up to 24 hours to show on ILSmart.

RFQs arrive by email

ILS emails RFQs to the addresses in the RFQ Recipient and MRO RFQ Recipient tiles of Company Profile, so a changed address quietly sends buyers' RFQs elsewhere.

Search alternates, not just one number

Sellers list the same part under alternate part numbers and NSNs. A check that reads only one part number can miss listings that sit under an equivalent.

Partner listings may need supplier web services

Partners that submit listings for you may need ILS to activate supplier web services on your account. Retrieving RFQs needs no such step.

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