FastSpring Invoices API

The Invoices API from FastSpring — 2 operation(s) for invoices.

Work with this as data

Every API 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 apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • 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.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/fastspring-invoices-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

fastspring-invoices-api-openapi.yml Raw ↑
openapi: 3.1.0
info:
  title: FastSpring Accounts Invoices API
  description: REST API for FastSpring's ecommerce / merchant-of-record platform. Covers orders, subscriptions, products, coupons, accounts (customers), sessions (checkout), invoices, quotes, returns, events (webhook history), data jobs (reports), and webhook key rotation. Authenticated via HTTP Basic credentials issued from the FastSpring App Dashboard under Integrations > API Credentials. Rate limited to 250 calls per minute per IP. Requires TLS 1.2+, UTF-8 encoding, a User-Agent header, and Content-Type application/json on writes.
  version: 1.0.0
  contact:
    name: FastSpring Developer Hub
    url: https://developer.fastspring.com
servers:
- url: https://api.fastspring.com
  description: FastSpring production API
security:
- BasicAuth: []
tags:
- name: Invoices
paths:
  /invoices:
    post:
      tags:
      - Invoices
      summary: Create a custom invoice
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Invoice
  /invoices/{invoice_id}:
    parameters:
    - in: path
      name: invoice_id
      required: true
      schema:
        type: string
    get:
      tags:
      - Invoices
      summary: Retrieve an invoice
      responses:
        '200':
          description: Invoice
components:
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic
      description: HTTP Basic with credentials from FastSpring App Dashboard