Melio API

Overview

Melio is an AP platform built for small businesses managing vendor payments, bills, and cash flow, and its core value proposition is simplifying the mechanics of paying suppliers: ACH transfers, check payments, card payments, and international transfers all managed through a single interface without requiring a full-featured accounting system. Its customer base is the SMB market: restaurants, retail shops, professional services firms, and small contractors that need something more capable than a bank's bill pay feature but do not need enterprise AP complexity. For SMB-focused fintech platforms and accounting software connectors building products for this market, Melio is a priority integration target: many of their target customers process vendor payments through it, and connecting to it programmatically is often a requirement for the product to be useful.

The API situation at Melio follows a pattern common to SMB-focused payment platforms: a documented REST API exists, and read access to payment records and vendor data is available without additional approval requirements. The barrier shows up at the write surface. Creating payments and submitting bills requires a separate API access approval process that Melio runs independently of standard account creation, applies regardless of plan tier, and carries no published approval timeline. SMB finance automation tools and accounting connectors that need to create or submit payments programmatically face this approval step as a production blocker: they can build and test integrations against read endpoints, but they cannot ship payment creation functionality until the approval completes. For a small business accounting connector whose customers expect to create and schedule vendor payments through the connector rather than switching back to the Melio portal, this approval gap makes the integration incomplete at launch.

Integuru generates a production-ready HTTP API for Melio using direct HTTP requests against the same endpoints the Melio web application uses internally for bill payment and vendor management. The eleven planned actions cover the full AP surface that SMB finance automation teams need, from reading payment records and vendor data to creating payments, managing bills, and monitoring payment status, without an additional API access approval process blocking the write surface.

Why Teams Need This Integration

Melio's payment creation approval gap creates a consistent production blocker for the same categories of SMB finance automation product.

Accounting software connectors and bookkeeping platforms. Tools that sync bill data from accounting software into Melio and push payment execution back face the sharpest version of this problem. A connector between QuickBooks and Melio, for example, needs list_invoices, get_invoice_detail, and create_payment to run the full bill-to-payment cycle without requiring the small business owner to log into Melio separately for the payment step. The read endpoints are accessible without additional approval; the create_payment action is not. Accounting connectors that cannot create payments programmatically are delivering half the automation their customers expect, with a manual step in the middle that defeats the purpose of the integration.

AI-powered cash flow and AP automation tools. Fintech platforms that analyze SMB cash flow, optimize payment timing for cash flow purposes, and surface early payment discount opportunities need list_payments, get_payment_status, and get_account_balance as live queries rather than exports. The create_payment action is what makes the optimization actionable: a tool that can identify that a vendor offers a 2% discount for payment within 10 days but cannot submit the payment programmatically can only present the opportunity without acting on it. approve_invoice feeds the bill queue management that these tools use to prioritize payment submissions based on discount windows and cash position.

Multi-client bookkeeping and CFO services platforms. Bookkeeping firms and fractional CFO platforms that manage AP for multiple small business clients through a single software layer need list_vendors, create_vendor, and create_payment to onboard new vendor relationships and process payments across all client accounts programmatically. Managing each client's Melio account individually through the portal does not scale past a handful of clients. The write access approval requirement applies per account, which means a bookkeeping platform serving 50 clients would need to complete the approval process for each one before it can automate payment creation for that client.

AP Workflows This Integration Covers

The eleven planned actions cover the payables data and write surfaces that SMB finance automation and accounting connector teams need from Melio:

• Payment operations: list_payments, get_payment_detail, and create_payment cover the payment index, full payment records with delivery method and status, and payment initiation for accounting connectors and cash flow tools that need to submit and track vendor payments programmatically.
• Vendor management: list_vendors, get_vendor_detail, and create_vendor surface the supplier roster with contact and payment preference data, and support programmatic vendor onboarding for bookkeeping platforms managing multiple client accounts.
• Bill lifecycle: list_invoices, get_invoice_detail, and approve_invoice give accounting connectors and AP automation tools the full bill data surface plus the ability to advance bills to the payment queue without requiring manual portal interaction.
• Status and balance monitoring: get_payment_status and get_account_balance provide payment delivery state and available funds data for cash flow monitoring tools and reconciliation systems that need current AP visibility at the SMB account level.

Adjacent Integrations

Integuru already operates in the FinTech vertical in production. The Wefunder integration delivers 6 live actions covering offering discovery, investment execution, and investor updates for equity crowdfunding workflows. The Velocity integration delivers borrower AML enrichment data for lending and compliance automation teams. The Dealground integration delivers 3 live actions for commercial real estate deal sourcing and document retrieval. All three demonstrate Integuru's direct HTTP approach in finance platforms where official API access is limited or approval-gated.