Your ERP Vendor Never Built an API for That Module. Here Are Your Options.
An ERP module the vendor never exposed through an API leaves five options. You can wait for the vendor, query the database, use a flat-file export, record an RPA bot, or use an agent-based integration. Deck is the agent-based option: it operates the module’s own screens, so the integration does not wait on the vendor’s roadmap.
ERP vendors build APIs for the modules every customer buys, like orders and inventory. The module your team depends on often never got one: a plant maintenance add-on, a regional compliance screen, a quality module bolted on in 2014.
What are the realistic options when one ERP module has no API?
An API gap is a module or screen inside an otherwise integrated system that the vendor never exposed through an API. The rest of the ERP syncs fine, and that one module still runs on manual entry.
There are five realistic paths:
- Wait for the vendor: file a feature request and hope the module lands on the roadmap.
- Query the database directly: read or write the module’s tables, often outside the support agreement.
- Use a scheduled export: pull a flat file if the module offers one, and accept read-only, delayed data.
- Record an RPA bot: script the clicks with a tool like UiPath and maintain it after every ERP patch.
- Use an agent-based integration: let an agent operate the module’s interface and return structured data.
Deck is a computer use agent platform that automates workflows by operating any web interface directly, so the target system never has to expose an API for it to work. Deck reads from and writes to the module through the same screens employees use, and returns every result as schema-validated JSON through Deck’s API.
For most teams, the fifth path is the only one that delivers read and write access this quarter. It avoids both the database and a recorded bot.
Why doesn’t the iPaaS connector cover it?
An iPaaS connector is a wrapper around a vendor’s API. MuleSoft, Boomi, and Workato build excellent connectors for the endpoints an ERP exposes. When the module has no endpoint, the connector has nothing to wrap.
The API gap is common. MuleSoft’s 2025 Connectivity Benchmark Report found the average enterprise manages 897 applications, and only 29% of them are integrated (MuleSoft). A module with no API cannot join the integrated 29% through a connector, no matter how good the iPaaS is.
Deck does not depend on an endpoint existing. Deck connects at the interface layer, the same way it connects AI agents to ERP systems without an API. The module integrates the day Deck connects to it.
Is querying the ERP database directly a good idea?
Usually not. Direct database access looks fast and creates three problems:
- Support risk: many ERP vendors restrict direct table writes in their support terms.
- Undocumented schemas: module tables often change between versions without public documentation.
- Skipped business logic: a direct write bypasses the validation rules, approvals, and audit logging the application enforces.
Writing straight to the tables is like entering a building through the loading dock. You get inside, and the front desk never logs that you arrived. Deck enters through the front door: it submits data through the module’s forms, so every validation rule and audit entry fires normally.
What about recording an RPA bot for one module?
RPA looks like a reasonable fit for a single screen. UiPath and Automation Anywhere can record the sequence in an afternoon.
The trouble starts with the next ERP patch. Recorded bots depend on fixed element positions and IDs, and ERP updates move them. Each update turns into a maintenance ticket for a bot that only serves one module. Deck’s agents read the screen visually rather than matching fixed selectors. After a patch, the agent relearns the task instead of someone re-recording a bot.
How does Deck connect to the module?
The setup follows the same pattern for any module:
- Store access: add a service account for the module in Deck Vault.
- Define the task: describe the read or write action, such as "pull open work orders" or "update inspection status."
- Set the schema: specify the fields and types Deck returns.
- Trigger it: call the task from Deck’s API on a schedule or from an event in another system.
- Consume the JSON: route the validated output to the data warehouse, MES, or the ERP’s API-covered modules.
Deck is set up in hours. BuildVision uses Deck as its interop layer inside legacy manufacturer systems that never exposed APIs. With Deck, BuildVision defers 3 to 6 months of engineering work until after a contract is signed.
FAQs
Does Deck work with ERP modules the vendor never exposed through an API?
Deck works with any ERP module a user reaches through a web interface. If an employee can log in and complete the task on screen, Deck operates the same screen and returns structured JSON.
Will using Deck put our ERP support agreement at risk?
Deck interacts with the ERP the same way an employee does, through the application interface. Deck makes no direct database changes, so the ERP’s own validation and audit logging stay in place.
Can Deck write data back into the module, not just read it?
Yes. Deck submits forms and updates records through the module’s own screens. Deck validates a write’s input before submitting it and validates the result against the task’s schema once the write completes.
What is the difference between Deck and an iPaaS like MuleSoft?
An iPaaS connects systems through their APIs. Deck connects through the interface when an API does not exist. Many teams use both, with Deck covering the modules the iPaaS cannot reach.
Should we just wait for the ERP vendor to build the API?
Waiting works only if the module is on the vendor’s published roadmap with a date. Most teams can’t run a process manually for an open-ended period. Deck connects to the module through its existing screens now, and the team can switch to the vendor API if one ships later.
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