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EsperWorksEsperWorks
Developer API

Build on top of
EsperWorks

A full REST API with 200+ endpoints, webhook support, and API key management. Build integrations, automate workflows, or embed EsperWorks into your own product.

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What you get

  • 200+ authenticated REST API endpoints
  • API key management with scope-based access control
  • Key rotation without downtime
  • Webhook support with HMAC-SHA256 signature verification
  • Idempotent payment processing
  • Per-key rate limiting at 120 requests per minute
  • Full webhook delivery logs per key
// Create an invoice
POST
/api/businesses/{id}/invoices
Authorization: Bearer ew_live_...
"client_id": 42,
"currency": "GHS",
"due_date": "2026-05-01",
"items": [...]