Megaventory API
44
AI ReadinessFoundational (D)44/100
Agent-ready OpenAPI document · curated by JenticE CommerceInventoryapiKey31 EndpointsREST
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For Agents
Manage Megaventory products, stock levels, sales orders, purchase orders, and suppliers so an agent can run the order-to-fulfilment loop programmatically.
Use for: Get the current stock for a product across all warehouses, Create a sales order for a customer with three line items, Update a product's selling price in Megaventory, Cancel an open purchase order with a supplier
Not supported: Does not handle payment processing, shipping label generation, or accounting general ledger - use for inventory, sales orders, purchase orders, and supplier and client records only.
Jentic publishes the only available OpenAPI specification for Megaventory API, keeping it validated and agent-ready. Megaventory is a cloud ERP for SMBs covering inventory, order management, light manufacturing, and reporting. The API exposes 31 endpoints across products, sales orders, purchase orders, suppliers and clients, inventory locations, stock levels, documents, and product bundles. Use it to keep stock counts in sync between Megaventory and a storefront, push purchase orders generated by an agent, or build a unified inventory view across multiple warehouses.
Install Jentic One Beta
Connect the Megaventory API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Megaventory 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://jentic.com/install.sh?src=apis&api=%2Fapis%2Fmegaventory.com%2Fmegaventory" | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fmegaventory.com%2Fmegaventory" | 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 Megaventory API.
Read product details, stock-on-hand, and batch numbers across inventory locations
Update product master records including SKU, name, and tax category
Create or update sales orders with line items, customer, and warehouse
Create or update purchase orders against suppliers with expected receive dates
Adjust inventory location stock by moving units between warehouses
Manage supplier and client records used by sales and purchase orders
Bundle products together as kit SKUs that automatically decrement components on sale
Use Cases
Patterns agents use Megaventory API for, with concrete tasks.
★ Storefront-to-ERP Stock Sync
Keep Megaventory's stock-on-hand in lockstep with a Shopify or WooCommerce storefront so the website never sells units that have already left the warehouse. The /InventoryLocationStock/ProductStockUpdate and /Product/ProductGet endpoints support a periodic two-way sync, and webhooks from the storefront can drive real-time decrements. Operations teams use this to prevent oversells without relying on a third-party middleware.
On every storefront order webhook, call ProductStockUpdate to decrement the corresponding Megaventory product stock at the fulfilment location.
Purchase-Order Automation
Generate purchase orders automatically when stock falls below reorder point, including line items priced at the supplier's last-known cost. The /PurchaseOrder/PurchaseOrderUpdate endpoint accepts a full PO payload, and ProductGet provides the inputs needed to build the lines. Procurement teams use this to remove the manual reorder spreadsheet step.
List products with stock below reorder_point, build a purchase order per supplier with the appropriate line items, and call PurchaseOrderUpdate to create each PO.
Multi-Warehouse Inventory Reporting
Build a single dashboard showing per-warehouse stock and pending sales orders by combining /InventoryLocation/InventoryLocationGet, /InventoryLocationStock/InventoryLocationStockGet, and /SalesOrder/SalesOrderGet. This gives operations a real-time view of where to fulfil from and which warehouses are over- or understocked. It replaces the nightly export-to-spreadsheet workflow that ERP-native dashboards usually require.
Pull all inventory locations and their stock levels along with open sales orders per warehouse, then render a per-location summary.
Agent-Driven Order Intake
Hand a sales-ops agent the ability to capture an order from a chat or email and create it in Megaventory with the right customer, products, and warehouse. Through Jentic the agent searches by intent, loads the SalesOrderUpdate schema, and submits a structured payload - Megaventory returns the order id ready to track. This collapses copy-paste order entry into an autonomous step.
Given a customer email and a list of SKUs and quantities, look up the matching SupplierClient and Products, then call SalesOrderUpdate to create a sales order at the default warehouse.
Key Endpoints
31 endpoints — jentic publishes the only available openapi specification for megaventory api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
POST
/Product/ProductGet
Read product master records
POST
/Product/ProductUpdate
Create or update a product
POST
/SalesOrder/SalesOrderUpdate
Create or update a sales order
POST
/PurchaseOrder/PurchaseOrderUpdate
Create or update a purchase order
POST
/InventoryLocationStock/ProductStockUpdate
Adjust stock for a product at a location
POST
/InventoryLocationStock/InventoryLocationStockGet
Read stock at an inventory location
POST
/SupplierClient/SupplierClientUpdate
Create or update a supplier or client record
POST
/Product/ProductBundleUpdate
Create or update a product bundle
POST
/Product/ProductGet
Read product master records
POST
/Product/ProductUpdate
Create or update a product
POST
/SalesOrder/SalesOrderUpdate
Create or update a sales order
POST
/PurchaseOrder/PurchaseOrderUpdate
Create or update a purchase order
POST
/InventoryLocationStock/ProductStockUpdate
Adjust stock for a product at a location
POST
/InventoryLocationStock/InventoryLocationStockGet
Read stock at an inventory location
POST
/SupplierClient/SupplierClientUpdate
Create or update a supplier or client record
POST
/Product/ProductBundleUpdate
Create or update a product bundle
Jentic AI Readiness Score
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
M
Megaventory API
- Foundational (D)44/100
77
Foundational Compliance56
Developer Experience & Jentic Compatibility41
AI-Readiness & Agent Experience94
Agent Usability15
Security66
AI DiscoverabilityPowered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
Show dimension breakdown
77
Foundational Compliance
Base layer of spec validity and structural soundness.
Grade: A-Signals: 4
97%
Lint Results
Aggregated quality score from linter diagnostics, weighted by severity.
100%
Resolution Completeness
Percentage of `$ref` references that resolve successfully.
100%
Specification Validity
Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).
10%
Structural Integrity
Structural correctness score based on schema issues using logarithmic dampening.
56
Developer Experience & Jentic Compatibility
Clarity, completeness, and ingestion readiness for developers and tooling.
Grade: CSignals: 4
0%
Example Density
How richly the API is illustrated with examples.
100%
Example Validity
Percentage of examples that conform to their schemas.
25%
Response Coverage
Percentage of operations with complete response definitions (success, client error, server error).
100%
Tooling Readiness
Health of API ingestion, bundling, and resolution within Jentic pipelines.
41
AI-Readiness & Agent Experience
Semantic breadth, depth, and agent comprehension for AI systems.
Grade: D-Signals: 4
14%
Description Coverage
Coverage of descriptions across API elements.
0%
Error Standardization
Coverage of RFC 9457 Problem Details for error responses.
100%
OperationId Quality
Coverage, uniqueness, and casing consistency of operationIds for AI inference.
50%
Summary Coverage
Coverage of summaries across operations/tags/info.
94
Agent Usability
Functional utility, complexity comfort, and AI orchestration readiness.
Grade: A+Signals: 1
94%
Complexity Comfort
Agent comfort level based on API operational and structural complexity.
15
Security
Trust, risk posture, and security compliance.
Grade: FSignals: 1
15%
Authentication Strength
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
66
AI Discoverability
Findability, semantic richness, and reasoning readiness.
Grade: BSignals: 1
66%
Descriptive Richness
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring Megaventory by hand means passing its APIKEY query parameter and hand-coding each POST call against api.megaventory.com for products, sales orders, purchase orders, and stock. Through Jentic you install once, import the Megaventory API from the API Directory, store the APIKEY once, and your agent calls it.
Permission scoping
Megaventory's operations carry their target in the request body rather than the URL path, so scope the agent to the operations it needs, such as reading products or updating a sales order. You choose the operations it may call, so a ProductUpdate or stock update runs only if you include it.
Credential isolation
Your Megaventory APIKEY is stored once, encrypted, by your own Jentic One instance and injected as the APIKEY parameter at execution time. It never enters the agent's prompt, logs, or context.
Intent-based discovery
Agents search Jentic by intent such as 'create a Megaventory sales order' or 'check stock at a location', and Jentic returns the matching operation with the schema for line items, customer code, and warehouse references so the agent calls the right endpoint without browsing the reference docs.
Related APIs
Alternatives and complements available in the Jentic catalogue.
Complementary
Stripe API
Stripe handles payment for orders that Megaventory tracks for fulfilment.
Use Stripe alongside Megaventory when payments must clear before a sales order is moved to picking.
FAQs
Specific to using Megaventory API through Jentic.
Why is there no official OpenAPI spec for Megaventory API?
Megaventory does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Megaventory API via structured tooling. It is validated against the live API and kept up to date. Get started with Jentic One, the self-hosted execution layer.
What authentication does the Megaventory API use?
Megaventory uses an APIKEY parameter sent in the request body or query string. Through Jentic the key is stored encrypted in the vault and injected at execution time, so the agent never sees the raw value.
Can I update stock levels through the Megaventory API?
Yes. /InventoryLocationStock/ProductStockUpdate adjusts on-hand quantities for a product at a chosen inventory location, and /InventoryLocationStock/InventoryLocationStockUpdate handles bulk location-level updates.
What are the rate limits for the Megaventory API?
Megaventory does not document a hard numeric limit. In practice, batch product and stock updates rather than calling per-row, and back off on 429 or service-busy responses before retrying through Jentic.
How do I create a sales order through Jentic?
Search Jentic for create a Megaventory sales order, load the schema for /SalesOrder/SalesOrderUpdate, and execute with the customer code, line items, and inventory location. Jentic returns the sales order id which you can read back via /SalesOrder/SalesOrderGet.
Can I bundle products together as a kit?
Yes. The /Product/ProductBundleUpdate endpoint defines a bundle SKU whose components are tracked individually, so selling the bundle decrements the stock of each component product automatically.
Can I limit what my agent is allowed to do with the Megaventory API?
Yes. Because you run Jentic One yourself and set the rules, you decide which Megaventory operations the agent may call, so it can read product and stock data without ever being able to write. For example, you can allow /Product/ProductGet and /InventoryLocationStock/InventoryLocationStockGet while withholding /Product/ProductUpdate, /SalesOrder/SalesOrderUpdate, or /InventoryLocationStock/ProductStockUpdate. Since Megaventory carries the target in the request body rather than the URL path, a stock update or purchase order runs only if you include that operation in the agent's allowed set.
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