BillingAppExternalInvoicing
External Invoicing app enables integration with third-party invoicing or payment system. The app supports a bi-directional synchronization pattern where OpenMeter Billing manages the invoice lifecycle while the external system handles invoice presentation and payment collection. Integration workflow: 1. The billing system creates invoices and transitions them through lifecycle states (draft → issuing → issued) 2. The integration receives webhook notifications about invoice state changes 3. The integration calls back to provide external system IDs and metadata 4. The integration reports payment events back via the payment status API State synchronization is controlled by hooks that pause invoice progression until the external system confirms synchronization via API callbacks.
Properties
| Name | Type | Description |
|---|---|---|
| id | string | ULID (Universally Unique Lexicographically Sortable Identifier). |
| name | string | Display name of the resource. Between 1 and 256 characters. |
| description | string | Optional description of the resource. Maximum 1024 characters. |
| labels | object | |
| created_at | string | An ISO-8601 timestamp representation of entity creation date. |
| updated_at | string | An ISO-8601 timestamp representation of entity last update date. |
| deleted_at | string | An ISO-8601 timestamp representation of entity deletion date. |
| type | string | The app type. |
| definition | object | The app catalog definition that this installed app is based on. |
| status | string | Status of the app connection. |
| enable_draft_sync_hook | boolean | Enable draft synchronization hook. When enabled, invoices will pause at the draft state and wait for the integration to call the draft synchronized endpoint before progressing to the issuing state. Th |
| enable_issuing_sync_hook | boolean | Enable issuing synchronization hook. When enabled, invoices will pause at the issuing state and wait for the integration to call the issuing synchronized endpoint before progressing to the issued stat |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "#/components/schemas/BillingAppExternalInvoicing",
"title": "BillingAppExternalInvoicing",
"description": "External Invoicing app enables integration with third-party invoicing or payment system.\n\nThe app supports a bi-directional synchronization pattern where OpenMeter Billing manages\nthe invoice lifecycle while the external system handles invoice presentation and payment collection.\n\nIntegration workflow:\n1. The billing system creates invoices and transitions them through lifecycle states (draft \u2192 issuing \u2192 issued)\n2. The integration receives webhook notifications about invoice state changes\n3. The integration calls back to provide external system IDs and metadata\n4. The integration reports payment events back via the payment status API\n\nState synchronization is controlled by hooks that pause invoice progression until the\nexternal system confirms synchronization via API callbacks.",
"type": "object",
"properties": {
"id": {
"description": "ULID (Universally Unique Lexicographically Sortable Identifier).",
"type": "string",
"example": "01G65Z755AFWAKHE12NY0CQ9FH",
"pattern": "^[0-7][0-9A-HJKMNP-TV-Z]{25}$",
"readOnly": true,
"title": "ULID"
},
"name": {
"description": "Display name of the resource.\n\nBetween 1 and 256 characters.",
"type": "string",
"maxLength": 256,
"minLength": 1
},
"description": {
"description": "Optional description of the resource.\n\nMaximum 1024 characters.",
"type": "string",
"maxLength": 1024
},
"labels": {
"$ref": "#/components/schemas/Labels"
},
"created_at": {
"description": "An ISO-8601 timestamp representation of entity creation date.",
"type": "string",
"format": "date-time",
"example": "2023-01-01T01:01:01.001Z",
"readOnly": true,
"title": "RFC3339 Date-Time"
},
"updated_at": {
"description": "An ISO-8601 timestamp representation of entity last update date.",
"type": "string",
"format": "date-time",
"example": "2023-01-01T01:01:01.001Z",
"readOnly": true,
"title": "RFC3339 Date-Time"
},
"deleted_at": {
"description": "An ISO-8601 timestamp representation of entity deletion date.",
"type": "string",
"format": "date-time",
"example": "2023-01-01T01:01:01.001Z",
"readOnly": true,
"title": "RFC3339 Date-Time"
},
"type": {
"description": "The app type.",
"type": "string",
"enum": [
"external_invoicing"
],
"readOnly": true
},
"definition": {
"description": "The app catalog definition that this installed app is based on.",
"type": "object",
"example": {
"type": "stripe",
"name": "Stripe",
"description": "Stripe integration allows you to collect payments with Stripe."
},
"properties": {
"type": {
"description": "Type of the app.",
"type": "string",
"enum": [
"sandbox",
"stripe",
"external_invoicing"
],
"readOnly": true,
"x-speakeasy-unknown-values": "allow"
},
"name": {
"description": "Name of the app.",
"type": "string",
"readOnly": true
},
"description": {
"description": "Description of the app.",
"type": "string",
"readOnly": true
}
},
"readOnly": true,
"required": [
"type",
"name",
"description"
]
},
"status": {
"description": "Status of the app connection.",
"type": "string",
"enum": [
"ready",
"unauthorized"
],
"readOnly": true,
"x-speakeasy-unknown-values": "allow"
},
"enable_draft_sync_hook": {
"description": "Enable draft synchronization hook.\n\nWhen enabled, invoices will pause at the draft state and wait for the integration\nto call the draft synchronized endpoint before progressing to the issuing state.\nThis allows the external system to validate and prepare the invoice data.\n\nWhen disabled, invoices automatically progress through the draft state based on\nthe configured workflow timing.",
"type": "boolean"
},
"enable_issuing_sync_hook": {
"description": "Enable issuing synchronization hook.\n\nWhen enabled, invoices will pause at the issuing state and wait for the integration\nto call the issuing synchronized endpoint before progressing to the issued state.\nThis ensures the external invoicing system has successfully created and finalized\nthe invoice before it is marked as issued.\n\nWhen disabled, invoices automatically progress through the issuing state and are\nimmediately marked as issued.",
"type": "boolean"
}
},
"required": [
"id",
"name",
"created_at",
"updated_at",
"type",
"definition",
"status",
"enable_draft_sync_hook",
"enable_issuing_sync_hook"
]
}
Work with this as data
Every JSON Schema here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for schemas
4 MCP tools reach this
find_json_schemasBrowse and filter every JSON Schema in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
curl "https://apis.io/api/v1/json-schemas/kong-billingappexternalinvoicing"
curl "https://apis.io/api/v1/json-schemas?limit=25"
Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.