Developer API & Webhooks

Build and automate on modern African fintech rails.

A full REST API with 200+ endpoints, webhook support, and scoped API keys. Automate invoice generation, sync client rosters, or trigger payout webhooks from your own stack.

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Production Infrastructure

African fintech rails with clean, modern REST semantics

Skip managing raw telco APIs or complex reconciliation logic. Trigger instant MoMo charges, generate compliant PDF receipts, and receive cryptographically signed webhook events.

200+ authenticated REST API endpoints

API key management with scope-based granular access

Zero-downtime key rotation & instant token revoking

Webhook delivery with HMAC-SHA256 signature verification

Idempotent payment processing & retry strategies

Per-key rate limiting at 120 requests/minute

REST API Endpoint

Live & Sandbox Ready

POST /api/invoices

200 ok

# Request Payload

client_id: 42,

currency: GHS,

amount: 4800.00,

tax_scheme: GRA_STANDARD_2026,

auto_momo_prompt: true

Webhook HeaderX-Esper-Signature: sha256=...

Verified Customer

“We plugged EsperWorks into our proprietary checkout in less than one afternoon. Our customers pay seamlessly with MoMo, and invoices are automatically GRA-tax registered behind the scenes.”

Kwame Agyapong · Lead Architect, PayFlow Technologies

100% Uptime

Quantified Outcome

Developer Toolkit