Start with a practical implementation path, then use the Finexio Developer Hub for guides, API reference, and technical review. Finexio supports file-based launches, embedded partner workflows, and API-led integrations.
API workflow preview
Plan the payment lifecycle before production code.
v2.1GET /v2/counterparties/
POST /invoices/batch/
GET /payments/?status=in-progress
POST /webhooks/
GET /reconciliation/drawdownData
Buyer, supplier, invoice, remittance, external IDs.
Events
Payment polling plus optional payment.changed webhook prompts.
Controls
Credential ownership, retries, logging, status ownership.
Close
Drawdown, reconciliation, audit trail, downstream consumers.
Public ReadMe v2.1 alignment, reviewed July 12, 2026. Examples use current API-reference values; production credentials and hostnames are confirmed during implementation.
Standard implementations commonly start with SFTP exchange for supplier and payment files, then return status and reconciliation outputs back.
Software, bank, and advisory partners can embed managed AP payments while Finexio handles supplier operations and rail orchestration.
Use the Developer Hub for guides and reference material when your team needs a direct API workflow.
Technical buyers should not be buried behind a generic demo path. These links point to the public Developer Hub, API reference, webhook guidance, lifecycle docs, and AI-readable docs index so implementation teams can self-orient before a review.
Start with the credential setup path for sandbox access, tenant context, and first technical review.
Get started→Review how API authentication works before deciding ownership, storage, and rotation practices.
Review auth→Use the credential validation guide to confirm access before building against payment workflows.
Test access→Map buyers, suppliers, invoices, batches, payment detail, and status outputs before build work starts.
Read summary→Plan payment retrieval, detail review, check images where applicable, and status synchronization.
View lifecycle→Subscribe to payment events so internal systems can update status without manual follow-up.
Open webhooks→Align retries, validation messages, and exception ownership before launch.
Plan errors→Expose structured Finexio API documentation to internal assistants and technical research workflows.
Open llms.txt→Finexio is strongest when implementation covers supplier data, payment instruction flow, exceptions, status, and reconciliation. The docs are the technical reference; this page is the business and implementation bridge.
Buyer and supplier provisioning
Invoice and payment detail
Payment status and reconciliation
Webhook event notifications
Authentication and credential validation
Error handling and exception workflows
Finexio implementations cross AP, treasury, supplier operations, support, security, and engineering. A high-quality integration plan names the system of record, the event owner, and the reconciliation consumer for every payment state.
Sandbox access, credential ownership, and environment handoff
Buyer, supplier, and counterparty data sources
Invoice batch structure, external IDs, and remittance requirements
Payment status ownership across ERP, AP, treasury, and support teams
Webhook subscription, retry, logging, and alerting expectations
Reconciliation output format, cadence, and downstream consumers
The public docs help engineering teams self-orient, but the strongest implementations still align the security model, buyer/supplier data, payment file or API scope, and production release plan with Finexio before build work accelerates.
Finexio provisions sandbox access. Testing should use authenticated HTTPS requests and non-production payment flows before any production cutover.
The public API docs currently describe Basic Auth over HTTPS. Confirm credential ownership, storage, rotation, and go-live handoff with Finexio implementation.
Decide early whether the launch is SFTP file-first, API-led, embedded partner, or hybrid. That choice changes data mapping, support ownership, and launch testing.
These CSVs are planning templates, not production schemas. Use them to align AP, finance, IT, security, support, and accounting before confirming exact file formats, API values, and output requirements with Finexio implementation.
Plan the approved payment-file fields your AP, ERP, procurement, or accounting system can provide before implementation scoping.
Download template CSVMap supplier identifiers, contact details, payment preference signals, verification needs, and support ownership.
Download template CSVAlign AP, treasury, support, and accounting owners around payment state, webhook, polling, and reconciliation behavior.
Download template CSVIdentify drawdown, invoice, supplier, amount, date, tracking, and downstream close fields before launch.
Download template MDUse a contract-grade checklist for environments, owners, endpoints, launch tests, and go/no-go evidence before build work starts.
Download template CSVMap webhook prompts, polling states, idempotency keys, fallback behavior, owners, and downstream consumer actions.
Download template CSVDefine buyer and Finexio ownership for status questions, returns, reissues, bank-change concerns, reconciliation gaps, and security requests.
Download templateThese examples are planning previews for technical evaluation. Use the public Developer Hub as the source of truth for current base URLs, authentication handling, schemas, field requirements, endpoint status, webhook event names, and environment-specific behavior.
Validate sandbox credentials against the current v2.1 reference host, then keep the base URL configurable for production handoff.
curl --request GET "https://api.finexio-stage.com/v2/counterparties/" \
--header "Authorization: Basic <base64 credentials>"
# Credential-validation use only; confirm production host during onboarding.Plan the invoice batch around durable buyer, supplier, invoice, remittance, and reconciliation identifiers.
POST /invoices/batch/
[
{
"amount_cents": 480000,
"currency": "USD",
"invoice_date": "2026-07-01",
"invoice_due_date": "2026-07-15",
"invoice_number": "INV-1042",
"originating_counterparty_id": "buyer-id",
"receiving_counterparty_id": "supplier-id",
"reconciliation_id": "ap-run-2026-07-01"
}
]Use payment polling and optional payment.changed webhooks as prompts to update downstream status and reconciliation consumers.
GET /payments/?status=in-progress
POST /webhooks/ { "event": "payment.changed" }
GET /reconciliation/drawdown?created_start=2026-07-01T00:00:00ZTreat webhooks as prompts to fetch the latest payment detail, not as the only synchronization source. Confirm the current subscription event name in the public docs before building.
{
"object_type": "payment",
"object_id": "pmt_mnXYAtWkNQEGbOGoDaOFJDREAekAlZh",
"event": "payment.changed"
}Exact API values should be confirmed in the public docs during implementation. The mapping below gives engineering, AP, treasury, and support teams a shared launch checklist for status, webhook, and reconciliation behavior.
Planning state
Signal
Invoice batch or payment instruction is received for processing.
Implementation move
Persist the external batch ID, source-system run ID, buyer, supplier, and invoice identifiers before any downstream update.
Owner
ERP/AP owner and integration lead
Planning state
Signal
Payment is not yet ready to be treated as delivered.
Implementation move
Keep AP status conservative, route supplier-data questions, and avoid marking invoices paid until delivery evidence exists.
Owner
AP operations and supplier-data owner
Planning state
Signal
Payment work is underway through the selected rail or operational workflow.
Implementation move
Expose status to support teams, continue polling, and use webhook notifications as prompts to fetch the latest record.
Owner
Integration lead and support owner
Planning state
Signal
Payment is complete enough to drive reconciliation and downstream ledger updates.
Implementation move
Match status, amount, supplier, invoice, tracking ID, and drawdown records before closing the AP run.
Owner
Treasury, accounting, and reconciliation owner
Planning state
Signal
A payment needs action, retry, reissue, supplier outreach, or operational review.
Implementation move
Assign an owner, preserve the original identifiers, log the resolution path, and decide whether the ERP needs a hold, reversal, or reissue signal.
Owner
Finexio implementation and customer AP owner
Use these tests to align API behavior with AP, treasury, security, support, and reconciliation expectations before the first production file or API run.
Validate sandbox credentials and confirm where secrets will live in production.
Confirm buyer, supplier, counterparty, and external IDs map cleanly before invoice batches move.
Submit a small approved invoice batch with representative invoice, amount, remittance, and reconciliation fields.
Poll payment status and confirm which downstream systems consume each status change.
Register a webhook subscription, log delivery attempts, and test idempotent handling for repeated notifications.
Compare drawdown reconciliation output against invoice, payment, bank, and ERP records before cutover.
Read the Finexio integration guide, then align the technical workflow with implementation scope.
Open docs→Review endpoints and objects for direct integration planning.
Open reference→Score file, supplier data, security, status, reconciliation, and launch readiness before scoping.
Score readiness→Embed AP Payments as a Service into software, bank, and advisory workflows.
Learn more→Finexio can review file format, ERP/AP system constraints, data quality, supplier workflow, payment status outputs, and reconciliation requirements before engineering work starts.